Zadanie domowe Zad4

Labs05 - task04
Rozwiązanie s45146

labs05/task04.py

@@ -7,6 +7,7 @@ Zwraca liczbę słów, znaków i linii.
 """
 
 import sys
+import argparse
 
 
 def count_lines(text):
@@ -29,11 +30,50 @@ def wc(text):
     chars = count_chars(text)
     return lines, words, chars
 
+#Moja klasa wyjątku
+class ArgException(Exception):
+    def __init__(self, text):
+        self.text = text
+    def __str__(self):
+        return self.text
 
 def main():
     """ main """
-    print(wc(sys.stdin.read()))
+    msg_usage = "Usage: task04.py [-h | -l | -w | -c] [file_name | stdin]"
+    parser = argparse.ArgumentParser()
+    parser.add_argument("-l", help="-l returns number of lines", action = 'store_true')
+    parser.add_argument("-w", help="-w returns number of words", action = 'store_true')
+    parser.add_argument("-c", help="-c returns number of characters", action = 'store_true')
+    parser.add_argument("file_name", help="This is path to the text input file to read the lines from or stdin if not given", type = argparse.FileType('rt'), nargs='?')
+    args = parser.parse_args()
+    if args.l + args.w + args.c > 1: #Jeśli więcej niż 1 argument {-l, -w, -c}
+        print(msg_usage, "\nToo many arguments passed!")
+        #print(args.l, args.w, args.c, args.input)
+        return
 
+    res = "" #Zwracany napis
+
+    if args.file_name is None:
+        fh_lines = sys.stdin.read()
+    else:
+        fh_lines = args.file_name.read()
+
+    if args.l:
+        res = count_lines(fh_lines)
+    elif args.w:
+        res = count_words(fh_lines)
+    elif args.c:
+        res = count_chars(fh_lines)
+    elif not (args.l and args.w and args.c):
+        res = wc(fh_lines)
+    else: #Coś jest nie tak!
+        raise ArgException(msg_usage, "\nError in arguments!")
+
+    #print(wc(sys.stdin.read()))
+    # print(wc(fh_lines))
+
+    #print(fh_lines)
+    print(res)
 
 if __name__ == "__main__":
     main()