152 lines
3.6 KiB
Python
152 lines
3.6 KiB
Python
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#+
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#
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# This file is part of h5py, a low-level Python interface to the HDF5 library.
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#
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# Contributed by Darren Dale
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#
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# Copyright (C) 2009 Darren Dale
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#
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# http://h5py.org
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# License: BSD (See LICENSE.txt for full license)
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#
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#-
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# pylint: disable=eval-used,protected-access
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"""
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This is the h5py completer extension for ipython. It is loaded by
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calling the function h5py.enable_ipython_completer() from within an
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interactive IPython session.
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It will let you do things like::
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f=File('foo.h5')
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f['<tab>
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# or:
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f['ite<tab>
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which will do tab completion based on the subgroups of `f`. Also::
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f['item1'].at<tab>
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will perform tab completion for the attributes in the usual way. This should
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also work::
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a = b = f['item1'].attrs.<tab>
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as should::
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f['item1/item2/it<tab>
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"""
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import posixpath
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import re
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from ._hl.attrs import AttributeManager
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from ._hl.base import HLObject
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from IPython import get_ipython
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from IPython.core.error import TryNext
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from IPython.utils import generics
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re_attr_match = re.compile(r"(?:.*\=)?(.+\[.*\].*)\.(\w*)$")
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re_item_match = re.compile(r"""(?:.*\=)?(.*)\[(?P<s>['|"])(?!.*(?P=s))(.*)$""")
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re_object_match = re.compile(r"(?:.*\=)?(.+?)(?:\[)")
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def _retrieve_obj(name, context):
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""" Filter function for completion. """
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# we don't want to call any functions, but I couldn't find a robust regex
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# that filtered them without unintended side effects. So keys containing
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# "(" will not complete.
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if '(' in name:
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raise ValueError()
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return eval(name, context.user_ns)
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def h5py_item_completer(context, command):
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"""Compute possible item matches for dict-like objects"""
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base, item = re_item_match.split(command)[1:4:2]
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try:
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obj = _retrieve_obj(base, context)
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except Exception:
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return []
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path, _ = posixpath.split(item)
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try:
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if path:
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items = (posixpath.join(path, name) for name in obj[path].keys())
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else:
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items = obj.keys()
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except AttributeError:
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return []
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items = list(items)
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return [i for i in items if i[:len(item)] == item]
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def h5py_attr_completer(context, command):
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"""Compute possible attr matches for nested dict-like objects"""
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base, attr = re_attr_match.split(command)[1:3]
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base = base.strip()
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try:
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obj = _retrieve_obj(base, context)
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except Exception:
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return []
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attrs = dir(obj)
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try:
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attrs = generics.complete_object(obj, attrs)
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except TryNext:
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pass
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try:
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# support >=ipython-0.12
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omit__names = get_ipython().Completer.omit__names
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except AttributeError:
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omit__names = 0
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if omit__names == 1:
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attrs = [a for a in attrs if not a.startswith('__')]
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elif omit__names == 2:
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attrs = [a for a in attrs if not a.startswith('_')]
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return ["%s.%s" % (base, a) for a in attrs if a[:len(attr)] == attr]
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def h5py_completer(self, event):
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""" Completer function to be loaded into IPython """
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base = re_object_match.split(event.line)[1]
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if not isinstance(self._ofind(base).get('obj'), (AttributeManager, HLObject)):
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raise TryNext
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try:
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return h5py_attr_completer(self, event.line)
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except ValueError:
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pass
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try:
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return h5py_item_completer(self, event.line)
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except ValueError:
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pass
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return []
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def load_ipython_extension(ip=None):
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""" Load completer function into IPython """
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if ip is None:
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ip = get_ipython()
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ip.set_hook('complete_command', h5py_completer, re_key=r"(?:.*\=)?(.+?)\[")
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