697 lines
25 KiB
Python
697 lines
25 KiB
Python
###############################################################################
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#
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# Worksheet - A class for writing Excel Worksheets.
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#
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# Copyright 2013-2019, John McNamara, jmcnamara@cpan.org
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#
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import re
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import datetime
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from warnings import warn
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COL_NAMES = {}
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range_parts = re.compile(r'(\$?)([A-Z]{1,3})(\$?)(\d+)')
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def xl_rowcol_to_cell(row, col, row_abs=False, col_abs=False):
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"""
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Convert a zero indexed row and column cell reference to a A1 style string.
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Args:
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row: The cell row. Int.
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col: The cell column. Int.
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row_abs: Optional flag to make the row absolute. Bool.
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col_abs: Optional flag to make the column absolute. Bool.
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Returns:
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A1 style string.
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"""
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if row < 0:
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warn("Row number %d must be >= 0" % row)
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return None
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if col < 0:
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warn("Col number %d must be >= 0" % col)
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return None
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row += 1 # Change to 1-index.
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row_abs = '$' if row_abs else ''
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col_str = xl_col_to_name(col, col_abs)
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return col_str + row_abs + str(row)
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def xl_rowcol_to_cell_fast(row, col):
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"""
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Optimized version of the xl_rowcol_to_cell function. Only used internally.
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Args:
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row: The cell row. Int.
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col: The cell column. Int.
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Returns:
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A1 style string.
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"""
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if col in COL_NAMES:
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col_str = COL_NAMES[col]
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else:
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col_str = xl_col_to_name(col)
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COL_NAMES[col] = col_str
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return col_str + str(row + 1)
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def xl_col_to_name(col, col_abs=False):
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"""
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Convert a zero indexed column cell reference to a string.
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Args:
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col: The cell column. Int.
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col_abs: Optional flag to make the column absolute. Bool.
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Returns:
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Column style string.
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"""
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col_num = col
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if col_num < 0:
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warn("Col number %d must be >= 0" % col_num)
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return None
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col_num += 1 # Change to 1-index.
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col_str = ''
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col_abs = '$' if col_abs else ''
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while col_num:
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# Set remainder from 1 .. 26
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remainder = col_num % 26
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if remainder == 0:
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remainder = 26
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# Convert the remainder to a character.
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col_letter = chr(ord('A') + remainder - 1)
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# Accumulate the column letters, right to left.
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col_str = col_letter + col_str
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# Get the next order of magnitude.
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col_num = int((col_num - 1) / 26)
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return col_abs + col_str
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def xl_cell_to_rowcol(cell_str):
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"""
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Convert a cell reference in A1 notation to a zero indexed row and column.
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Args:
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cell_str: A1 style string.
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Returns:
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row, col: Zero indexed cell row and column indices.
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"""
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if not cell_str:
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return 0, 0
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match = range_parts.match(cell_str)
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col_str = match.group(2)
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row_str = match.group(4)
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# Convert base26 column string to number.
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expn = 0
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col = 0
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for char in reversed(col_str):
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col += (ord(char) - ord('A') + 1) * (26 ** expn)
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expn += 1
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# Convert 1-index to zero-index
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row = int(row_str) - 1
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col -= 1
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return row, col
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def xl_cell_to_rowcol_abs(cell_str):
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"""
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Convert an absolute cell reference in A1 notation to a zero indexed
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row and column, with True/False values for absolute rows or columns.
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Args:
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cell_str: A1 style string.
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Returns:
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row, col, row_abs, col_abs: Zero indexed cell row and column indices.
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"""
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if not cell_str:
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return 0, 0, False, False
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match = range_parts.match(cell_str)
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col_abs = match.group(1)
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col_str = match.group(2)
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row_abs = match.group(3)
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row_str = match.group(4)
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if col_abs:
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col_abs = True
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else:
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col_abs = False
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if row_abs:
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row_abs = True
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else:
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row_abs = False
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# Convert base26 column string to number.
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expn = 0
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col = 0
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for char in reversed(col_str):
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col += (ord(char) - ord('A') + 1) * (26 ** expn)
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expn += 1
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# Convert 1-index to zero-index
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row = int(row_str) - 1
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col -= 1
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return row, col, row_abs, col_abs
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def xl_range(first_row, first_col, last_row, last_col):
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"""
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Convert zero indexed row and col cell references to a A1:B1 range string.
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Args:
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first_row: The first cell row. Int.
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first_col: The first cell column. Int.
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last_row: The last cell row. Int.
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last_col: The last cell column. Int.
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Returns:
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A1:B1 style range string.
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"""
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range1 = xl_rowcol_to_cell(first_row, first_col)
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range2 = xl_rowcol_to_cell(last_row, last_col)
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if range1 is None or range2 is None:
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warn("Row and column numbers must be >= 0")
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return None
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return range1 + ':' + range2
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def xl_range_abs(first_row, first_col, last_row, last_col):
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"""
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Convert zero indexed row and col cell references to a $A$1:$B$1 absolute
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range string.
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Args:
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first_row: The first cell row. Int.
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first_col: The first cell column. Int.
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last_row: The last cell row. Int.
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last_col: The last cell column. Int.
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Returns:
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$A$1:$B$1 style range string.
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"""
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range1 = xl_rowcol_to_cell(first_row, first_col, True, True)
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range2 = xl_rowcol_to_cell(last_row, last_col, True, True)
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if range1 is None or range2 is None:
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warn("Row and column numbers must be >= 0")
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return None
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return range1 + ':' + range2
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def xl_range_formula(sheetname, first_row, first_col, last_row, last_col):
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"""
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Convert worksheet name and zero indexed row and col cell references to
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a Sheet1!A1:B1 range formula string.
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Args:
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sheetname: The worksheet name. String.
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first_row: The first cell row. Int.
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first_col: The first cell column. Int.
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last_row: The last cell row. Int.
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last_col: The last cell column. Int.
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Returns:
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A1:B1 style range string.
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"""
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cell_range = xl_range_abs(first_row, first_col, last_row, last_col)
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sheetname = quote_sheetname(sheetname)
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return sheetname + '!' + cell_range
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def quote_sheetname(sheetname):
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"""
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Convert a worksheet name to a quoted name if it contains spaces or
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special characters.
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Args:
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sheetname: The worksheet name. String.
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Returns:
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A quoted worksheet string.
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"""
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# TODO. Possibly extend this to quote sheetnames that look like ranges.
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if not sheetname.isalnum() and not sheetname.startswith("'"):
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# Double quote any single quotes.
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sheetname = sheetname.replace("'", "''")
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# Singe quote the sheet name.
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sheetname = "'%s'" % sheetname
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return sheetname
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def xl_color(color):
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# Used in conjunction with the XlsxWriter *color() methods to convert
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# a color name into an RGB formatted string. These colors are for
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# backward compatibility with older versions of Excel.
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named_colors = {
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'black': '#000000',
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'blue': '#0000FF',
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'brown': '#800000',
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'cyan': '#00FFFF',
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'gray': '#808080',
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'green': '#008000',
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'lime': '#00FF00',
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'magenta': '#FF00FF',
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'navy': '#000080',
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'orange': '#FF6600',
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'pink': '#FF00FF',
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'purple': '#800080',
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'red': '#FF0000',
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'silver': '#C0C0C0',
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'white': '#FFFFFF',
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'yellow': '#FFFF00',
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}
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if color in named_colors:
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color = named_colors[color]
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if not re.match('#[0-9a-fA-F]{6}', color):
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warn("Color '%s' isn't a valid Excel color" % color)
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# Convert the RGB color to the Excel ARGB format.
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return "FF" + color.lstrip('#').upper()
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def get_rgb_color(color):
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# Convert the user specified color to an RGB color.
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rgb_color = xl_color(color)
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# Remove leading FF from RGB color for charts.
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rgb_color = re.sub(r'^FF', '', rgb_color)
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return rgb_color
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def get_sparkline_style(style_id):
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styles = [
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{'series': {'theme': "4", 'tint': "-0.499984740745262"},
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'negative': {'theme': "5"},
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'markers': {'theme': "4", 'tint': "-0.499984740745262"},
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'first': {'theme': "4", 'tint': "0.39997558519241921"},
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'last': {'theme': "4", 'tint': "0.39997558519241921"},
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'high': {'theme': "4"},
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'low': {'theme': "4"},
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}, # 0
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{'series': {'theme': "4", 'tint': "-0.499984740745262"},
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'negative': {'theme': "5"},
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'markers': {'theme': "4", 'tint': "-0.499984740745262"},
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'first': {'theme': "4", 'tint': "0.39997558519241921"},
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'last': {'theme': "4", 'tint': "0.39997558519241921"},
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'high': {'theme': "4"},
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'low': {'theme': "4"},
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}, # 1
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{'series': {'theme': "5", 'tint': "-0.499984740745262"},
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'negative': {'theme': "6"},
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'markers': {'theme': "5", 'tint': "-0.499984740745262"},
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'first': {'theme': "5", 'tint': "0.39997558519241921"},
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'last': {'theme': "5", 'tint': "0.39997558519241921"},
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'high': {'theme': "5"},
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'low': {'theme': "5"},
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}, # 2
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{'series': {'theme': "6", 'tint': "-0.499984740745262"},
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'negative': {'theme': "7"},
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'markers': {'theme': "6", 'tint': "-0.499984740745262"},
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'first': {'theme': "6", 'tint': "0.39997558519241921"},
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'last': {'theme': "6", 'tint': "0.39997558519241921"},
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'high': {'theme': "6"},
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'low': {'theme': "6"},
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}, # 3
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{'series': {'theme': "7", 'tint': "-0.499984740745262"},
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'negative': {'theme': "8"},
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'markers': {'theme': "7", 'tint': "-0.499984740745262"},
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'first': {'theme': "7", 'tint': "0.39997558519241921"},
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'last': {'theme': "7", 'tint': "0.39997558519241921"},
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'high': {'theme': "7"},
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'low': {'theme': "7"},
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}, # 4
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{'series': {'theme': "8", 'tint': "-0.499984740745262"},
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'negative': {'theme': "9"},
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'markers': {'theme': "8", 'tint': "-0.499984740745262"},
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'first': {'theme': "8", 'tint': "0.39997558519241921"},
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'last': {'theme': "8", 'tint': "0.39997558519241921"},
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'high': {'theme': "8"},
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'low': {'theme': "8"},
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}, # 5
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{'series': {'theme': "9", 'tint': "-0.499984740745262"},
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'negative': {'theme': "4"},
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'markers': {'theme': "9", 'tint': "-0.499984740745262"},
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'first': {'theme': "9", 'tint': "0.39997558519241921"},
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'last': {'theme': "9", 'tint': "0.39997558519241921"},
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'high': {'theme': "9"},
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'low': {'theme': "9"},
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}, # 6
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{'series': {'theme': "4", 'tint': "-0.249977111117893"},
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'negative': {'theme': "5"},
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'markers': {'theme': "5", 'tint': "-0.249977111117893"},
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'first': {'theme': "5", 'tint': "-0.249977111117893"},
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'last': {'theme': "5", 'tint': "-0.249977111117893"},
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'high': {'theme': "5", 'tint': "-0.249977111117893"},
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'low': {'theme': "5", 'tint': "-0.249977111117893"},
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}, # 7
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{'series': {'theme': "5", 'tint': "-0.249977111117893"},
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'negative': {'theme': "6"},
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'markers': {'theme': "6", 'tint': "-0.249977111117893"},
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'first': {'theme': "6", 'tint': "-0.249977111117893"},
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'last': {'theme': "6", 'tint': "-0.249977111117893"},
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'high': {'theme': "6", 'tint': "-0.249977111117893"},
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'low': {'theme': "6", 'tint': "-0.249977111117893"},
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}, # 8
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{'series': {'theme': "6", 'tint': "-0.249977111117893"},
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'negative': {'theme': "7"},
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'markers': {'theme': "7", 'tint': "-0.249977111117893"},
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'first': {'theme': "7", 'tint': "-0.249977111117893"},
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'last': {'theme': "7", 'tint': "-0.249977111117893"},
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'high': {'theme': "7", 'tint': "-0.249977111117893"},
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'low': {'theme': "7", 'tint': "-0.249977111117893"},
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}, # 9
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{'series': {'theme': "7", 'tint': "-0.249977111117893"},
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'negative': {'theme': "8"},
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'markers': {'theme': "8", 'tint': "-0.249977111117893"},
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'first': {'theme': "8", 'tint': "-0.249977111117893"},
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'last': {'theme': "8", 'tint': "-0.249977111117893"},
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'high': {'theme': "8", 'tint': "-0.249977111117893"},
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'low': {'theme': "8", 'tint': "-0.249977111117893"},
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}, # 10
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{'series': {'theme': "8", 'tint': "-0.249977111117893"},
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'negative': {'theme': "9"},
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'markers': {'theme': "9", 'tint': "-0.249977111117893"},
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'first': {'theme': "9", 'tint': "-0.249977111117893"},
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'last': {'theme': "9", 'tint': "-0.249977111117893"},
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'high': {'theme': "9", 'tint': "-0.249977111117893"},
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'low': {'theme': "9", 'tint': "-0.249977111117893"},
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}, # 11
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{'series': {'theme': "9", 'tint': "-0.249977111117893"},
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'negative': {'theme': "4"},
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'markers': {'theme': "4", 'tint': "-0.249977111117893"},
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'first': {'theme': "4", 'tint': "-0.249977111117893"},
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'last': {'theme': "4", 'tint': "-0.249977111117893"},
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'high': {'theme': "4", 'tint': "-0.249977111117893"},
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'low': {'theme': "4", 'tint': "-0.249977111117893"},
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}, # 12
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{'series': {'theme': "4"},
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'negative': {'theme': "5"},
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'markers': {'theme': "4", 'tint': "-0.249977111117893"},
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'first': {'theme': "4", 'tint': "-0.249977111117893"},
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'last': {'theme': "4", 'tint': "-0.249977111117893"},
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'high': {'theme': "4", 'tint': "-0.249977111117893"},
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'low': {'theme': "4", 'tint': "-0.249977111117893"},
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}, # 13
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{'series': {'theme': "5"},
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'negative': {'theme': "6"},
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'markers': {'theme': "5", 'tint': "-0.249977111117893"},
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'first': {'theme': "5", 'tint': "-0.249977111117893"},
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'last': {'theme': "5", 'tint': "-0.249977111117893"},
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'high': {'theme': "5", 'tint': "-0.249977111117893"},
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'low': {'theme': "5", 'tint': "-0.249977111117893"},
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}, # 14
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{'series': {'theme': "6"},
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'negative': {'theme': "7"},
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'markers': {'theme': "6", 'tint': "-0.249977111117893"},
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'first': {'theme': "6", 'tint': "-0.249977111117893"},
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'last': {'theme': "6", 'tint': "-0.249977111117893"},
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'high': {'theme': "6", 'tint': "-0.249977111117893"},
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'low': {'theme': "6", 'tint': "-0.249977111117893"},
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}, # 15
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{'series': {'theme': "7"},
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'negative': {'theme': "8"},
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'markers': {'theme': "7", 'tint': "-0.249977111117893"},
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'first': {'theme': "7", 'tint': "-0.249977111117893"},
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'last': {'theme': "7", 'tint': "-0.249977111117893"},
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'high': {'theme': "7", 'tint': "-0.249977111117893"},
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'low': {'theme': "7", 'tint': "-0.249977111117893"},
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}, # 16
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{'series': {'theme': "8"},
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'negative': {'theme': "9"},
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'markers': {'theme': "8", 'tint': "-0.249977111117893"},
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'first': {'theme': "8", 'tint': "-0.249977111117893"},
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'last': {'theme': "8", 'tint': "-0.249977111117893"},
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'high': {'theme': "8", 'tint': "-0.249977111117893"},
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'low': {'theme': "8", 'tint': "-0.249977111117893"},
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}, # 17
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{'series': {'theme': "9"},
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'negative': {'theme': "4"},
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'markers': {'theme': "9", 'tint': "-0.249977111117893"},
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|
'first': {'theme': "9", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "9", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "9", 'tint': "-0.249977111117893"},
|
|
'low': {'theme': "9", 'tint': "-0.249977111117893"},
|
|
}, # 18
|
|
{'series': {'theme': "4", 'tint': "0.39997558519241921"},
|
|
'negative': {'theme': "0", 'tint': "-0.499984740745262"},
|
|
'markers': {'theme': "4", 'tint': "0.79998168889431442"},
|
|
'first': {'theme': "4", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "4", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "4", 'tint': "-0.499984740745262"},
|
|
'low': {'theme': "4", 'tint': "-0.499984740745262"},
|
|
}, # 19
|
|
{'series': {'theme': "5", 'tint': "0.39997558519241921"},
|
|
'negative': {'theme': "0", 'tint': "-0.499984740745262"},
|
|
'markers': {'theme': "5", 'tint': "0.79998168889431442"},
|
|
'first': {'theme': "5", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "5", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "5", 'tint': "-0.499984740745262"},
|
|
'low': {'theme': "5", 'tint': "-0.499984740745262"},
|
|
}, # 20
|
|
{'series': {'theme': "6", 'tint': "0.39997558519241921"},
|
|
'negative': {'theme': "0", 'tint': "-0.499984740745262"},
|
|
'markers': {'theme': "6", 'tint': "0.79998168889431442"},
|
|
'first': {'theme': "6", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "6", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "6", 'tint': "-0.499984740745262"},
|
|
'low': {'theme': "6", 'tint': "-0.499984740745262"},
|
|
}, # 21
|
|
{'series': {'theme': "7", 'tint': "0.39997558519241921"},
|
|
'negative': {'theme': "0", 'tint': "-0.499984740745262"},
|
|
'markers': {'theme': "7", 'tint': "0.79998168889431442"},
|
|
'first': {'theme': "7", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "7", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "7", 'tint': "-0.499984740745262"},
|
|
'low': {'theme': "7", 'tint': "-0.499984740745262"},
|
|
}, # 22
|
|
{'series': {'theme': "8", 'tint': "0.39997558519241921"},
|
|
'negative': {'theme': "0", 'tint': "-0.499984740745262"},
|
|
'markers': {'theme': "8", 'tint': "0.79998168889431442"},
|
|
'first': {'theme': "8", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "8", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "8", 'tint': "-0.499984740745262"},
|
|
'low': {'theme': "8", 'tint': "-0.499984740745262"},
|
|
}, # 23
|
|
{'series': {'theme': "9", 'tint': "0.39997558519241921"},
|
|
'negative': {'theme': "0", 'tint': "-0.499984740745262"},
|
|
'markers': {'theme': "9", 'tint': "0.79998168889431442"},
|
|
'first': {'theme': "9", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "9", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "9", 'tint': "-0.499984740745262"},
|
|
'low': {'theme': "9", 'tint': "-0.499984740745262"},
|
|
}, # 24
|
|
{'series': {'theme': "1", 'tint': "0.499984740745262"},
|
|
'negative': {'theme': "1", 'tint': "0.249977111117893"},
|
|
'markers': {'theme': "1", 'tint': "0.249977111117893"},
|
|
'first': {'theme': "1", 'tint': "0.249977111117893"},
|
|
'last': {'theme': "1", 'tint': "0.249977111117893"},
|
|
'high': {'theme': "1", 'tint': "0.249977111117893"},
|
|
'low': {'theme': "1", 'tint': "0.249977111117893"},
|
|
}, # 25
|
|
{'series': {'theme': "1", 'tint': "0.34998626667073579"},
|
|
'negative': {'theme': "0", 'tint': "-0.249977111117893"},
|
|
'markers': {'theme': "0", 'tint': "-0.249977111117893"},
|
|
'first': {'theme': "0", 'tint': "-0.249977111117893"},
|
|
'last': {'theme': "0", 'tint': "-0.249977111117893"},
|
|
'high': {'theme': "0", 'tint': "-0.249977111117893"},
|
|
'low': {'theme': "0", 'tint': "-0.249977111117893"},
|
|
}, # 26
|
|
{'series': {'rgb': "FF323232"},
|
|
'negative': {'rgb': "FFD00000"},
|
|
'markers': {'rgb': "FFD00000"},
|
|
'first': {'rgb': "FFD00000"},
|
|
'last': {'rgb': "FFD00000"},
|
|
'high': {'rgb': "FFD00000"},
|
|
'low': {'rgb': "FFD00000"},
|
|
}, # 27
|
|
{'series': {'rgb': "FF000000"},
|
|
'negative': {'rgb': "FF0070C0"},
|
|
'markers': {'rgb': "FF0070C0"},
|
|
'first': {'rgb': "FF0070C0"},
|
|
'last': {'rgb': "FF0070C0"},
|
|
'high': {'rgb': "FF0070C0"},
|
|
'low': {'rgb': "FF0070C0"},
|
|
}, # 28
|
|
{'series': {'rgb': "FF376092"},
|
|
'negative': {'rgb': "FFD00000"},
|
|
'markers': {'rgb': "FFD00000"},
|
|
'first': {'rgb': "FFD00000"},
|
|
'last': {'rgb': "FFD00000"},
|
|
'high': {'rgb': "FFD00000"},
|
|
'low': {'rgb': "FFD00000"},
|
|
}, # 29
|
|
{'series': {'rgb': "FF0070C0"},
|
|
'negative': {'rgb': "FF000000"},
|
|
'markers': {'rgb': "FF000000"},
|
|
'first': {'rgb': "FF000000"},
|
|
'last': {'rgb': "FF000000"},
|
|
'high': {'rgb': "FF000000"},
|
|
'low': {'rgb': "FF000000"},
|
|
}, # 30
|
|
{'series': {'rgb': "FF5F5F5F"},
|
|
'negative': {'rgb': "FFFFB620"},
|
|
'markers': {'rgb': "FFD70077"},
|
|
'first': {'rgb': "FF5687C2"},
|
|
'last': {'rgb': "FF359CEB"},
|
|
'high': {'rgb': "FF56BE79"},
|
|
'low': {'rgb': "FFFF5055"},
|
|
}, # 31
|
|
{'series': {'rgb': "FF5687C2"},
|
|
'negative': {'rgb': "FFFFB620"},
|
|
'markers': {'rgb': "FFD70077"},
|
|
'first': {'rgb': "FF777777"},
|
|
'last': {'rgb': "FF359CEB"},
|
|
'high': {'rgb': "FF56BE79"},
|
|
'low': {'rgb': "FFFF5055"},
|
|
}, # 32
|
|
{'series': {'rgb': "FFC6EFCE"},
|
|
'negative': {'rgb': "FFFFC7CE"},
|
|
'markers': {'rgb': "FF8CADD6"},
|
|
'first': {'rgb': "FFFFDC47"},
|
|
'last': {'rgb': "FFFFEB9C"},
|
|
'high': {'rgb': "FF60D276"},
|
|
'low': {'rgb': "FFFF5367"},
|
|
}, # 33
|
|
{'series': {'rgb': "FF00B050"},
|
|
'negative': {'rgb': "FFFF0000"},
|
|
'markers': {'rgb': "FF0070C0"},
|
|
'first': {'rgb': "FFFFC000"},
|
|
'last': {'rgb': "FFFFC000"},
|
|
'high': {'rgb': "FF00B050"},
|
|
'low': {'rgb': "FFFF0000"},
|
|
}, # 34
|
|
{'series': {'theme': "3"},
|
|
'negative': {'theme': "9"},
|
|
'markers': {'theme': "8"},
|
|
'first': {'theme': "4"},
|
|
'last': {'theme': "5"},
|
|
'high': {'theme': "6"},
|
|
'low': {'theme': "7"},
|
|
}, # 35
|
|
{'series': {'theme': "1"},
|
|
'negative': {'theme': "9"},
|
|
'markers': {'theme': "8"},
|
|
'first': {'theme': "4"},
|
|
'last': {'theme': "5"},
|
|
'high': {'theme': "6"},
|
|
'low': {'theme': "7"},
|
|
}, # 36
|
|
]
|
|
|
|
return styles[style_id]
|
|
|
|
|
|
def supported_datetime(dt):
|
|
# Determine is an argument is a supported datetime object.
|
|
return(isinstance(dt, (datetime.datetime,
|
|
datetime.date,
|
|
datetime.time,
|
|
datetime.timedelta)))
|
|
|
|
|
|
def remove_datetime_timezone(dt_obj, remove_timezone):
|
|
# Excel doesn't support timezones in datetimes/times so we remove the
|
|
# tzinfo from the object if the user has specified that option in the
|
|
# constructor.
|
|
if remove_timezone:
|
|
dt_obj = dt_obj.replace(tzinfo=None)
|
|
else:
|
|
if dt_obj.tzinfo:
|
|
raise TypeError(
|
|
"Excel doesn't support timezones in datetimes. "
|
|
"Set the tzinfo in the datetime/time object to None or "
|
|
"use the 'remove_timezone' Workbook() option")
|
|
|
|
return dt_obj
|
|
|
|
|
|
def datetime_to_excel_datetime(dt_obj, date_1904, remove_timezone):
|
|
# Convert a datetime object to an Excel serial date and time. The integer
|
|
# part of the number stores the number of days since the epoch and the
|
|
# fractional part stores the percentage of the day.
|
|
date_type = dt_obj
|
|
|
|
if date_1904:
|
|
# Excel for Mac date epoch.
|
|
epoch = datetime.datetime(1904, 1, 1)
|
|
else:
|
|
# Default Excel epoch.
|
|
epoch = datetime.datetime(1899, 12, 31)
|
|
|
|
# We handle datetime .datetime, .date and .time objects but convert
|
|
# them to datetime.datetime objects and process them in the same way.
|
|
if isinstance(dt_obj, datetime.datetime):
|
|
dt_obj = remove_datetime_timezone(dt_obj, remove_timezone)
|
|
delta = dt_obj - epoch
|
|
elif isinstance(dt_obj, datetime.date):
|
|
dt_obj = datetime.datetime.fromordinal(dt_obj.toordinal())
|
|
delta = dt_obj - epoch
|
|
elif isinstance(dt_obj, datetime.time):
|
|
dt_obj = datetime.datetime.combine(epoch, dt_obj)
|
|
dt_obj = remove_datetime_timezone(dt_obj, remove_timezone)
|
|
delta = dt_obj - epoch
|
|
elif isinstance(dt_obj, datetime.timedelta):
|
|
delta = dt_obj
|
|
else:
|
|
raise TypeError("Unknown or unsupported datetime type")
|
|
|
|
# Convert a Python datetime.datetime value to an Excel date number.
|
|
excel_time = (delta.days
|
|
+ (float(delta.seconds)
|
|
+ float(delta.microseconds) / 1E6)
|
|
/ (60 * 60 * 24))
|
|
|
|
# The following is a workaround for the fact that in Excel a time only
|
|
# value is represented as 1899-12-31+time whereas in datetime.datetime()
|
|
# it is 1900-1-1+time so we need to subtract the 1 day difference.
|
|
if (isinstance(date_type, datetime.datetime)
|
|
and dt_obj.isocalendar() == (1900, 1, 1)):
|
|
excel_time -= 1
|
|
|
|
# Account for Excel erroneously treating 1900 as a leap year.
|
|
if not date_1904 and excel_time > 59:
|
|
excel_time += 1
|
|
|
|
return excel_time
|