imip-agent

Annotated imiptools/text.py

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2016-01-31 Paul Boddie file changeset files shortlog Introduced the access control list scheduling function plus argument support. Moved scheduling function lookup into the scheduling module as part of the revised function invocation parsing activity, employing a new text processing module in imiptools. Added tests of the access control list functionality.
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#!/usr/bin/env python
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"""
 
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Parsing of textual content.
 
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Copyright (C) 2016 Paul Boddie <paul@boddie.org.uk>
 
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This program is free software; you can redistribute it and/or modify it under
 
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the terms of the GNU General Public License as published by the Free Software
 
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Foundation; either version 3 of the License, or (at your option) any later
 
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version.
 
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This program is distributed in the hope that it will be useful, but WITHOUT
 
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 
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FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 
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details.
 
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You should have received a copy of the GNU General Public License along with
 
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this program.  If not, see <http://www.gnu.org/licenses/>.
 
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"""
 
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import re
 
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# Parsing of lines to obtain functions and arguments.
 
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line_pattern_str = r"(?:" \
 
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                   r"(?:'(.*?)')" \
 
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                   r"|" \
 
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                   r'(?:"(.*?)")' \
 
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                   r"|" \
 
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                   r"([^\s]+)" \
 
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                   r")+" \
 
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                   r"(?:\s+|$)"
 
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line_pattern = re.compile(line_pattern_str)
 
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def parse_line(text):
 
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    """
 
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    Parse the given 'text', returning a list of words separated by whitespace in
 
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    the input, where whitespace may occur inside words if quoted using single or
 
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    double quotes.
 
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    """
 
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    parts = []
 
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    # Match the components of each part.
 
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    for match in line_pattern.finditer(text):
 
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        # Combine the components by traversing the matching groups.
 
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        parts.append(reduce(lambda a, b: (a or "") + (b or ""), match.groups()))
 
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    return parts
 
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