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https://github.com/kennethreitz/dive-into-python3.git
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Mark Pilgrim
933dc9459a
--HG-- rename : humansize.py => examples/humansize.py rename : roman1.py => examples/roman1.py rename : roman2.py => examples/roman2.py rename : roman3.py => examples/roman3.py rename : roman4.py => examples/roman4.py rename : roman5.py => examples/roman5.py rename : roman6.py => examples/roman6.py rename : roman7.py => examples/roman7.py rename : roman8.py => examples/roman8.py rename : romantest1.py => examples/romantest1.py rename : romantest2.py => examples/romantest2.py rename : romantest3.py => examples/romantest3.py rename : romantest4.py => examples/romantest4.py rename : romantest5.py => examples/romantest5.py rename : romantest6.py => examples/romantest6.py rename : romantest7.py => examples/romantest7.py rename : romantest8.py => examples/romantest8.py
74 lines
2.2 KiB
Python
74 lines
2.2 KiB
Python
"""Pluralize English nouns (stage 2)
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Command line usage:
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$ python plural2.py noun
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nouns
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"""
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import re
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def match_sxz(noun):
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return re.search('[sxz]$', noun)
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def apply_sxz(noun):
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return re.sub('$', 'es', noun)
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def match_h(noun):
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return re.search('[^aeioudgkprt]h$', noun)
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def apply_h(noun):
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return re.sub('$', 'es', noun)
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def match_y(noun):
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return re.search('[^aeiou]y$', noun)
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def apply_y(noun):
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return re.sub('y$', 'ies', noun)
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def match_default(noun):
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return True
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def apply_default(noun):
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return noun + 's'
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rules = ((match_sxz, apply_sxz),
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(match_h, apply_h),
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(match_y, apply_y),
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(match_default, apply_default)
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)
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def plural(noun):
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for matches_rule, apply_rule in rules:
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if matches_rule(noun):
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return apply_rule(noun)
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if __name__ == '__main__':
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import sys
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if sys.argv[1:]:
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print(plural(sys.argv[1]))
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else:
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print(__doc__)
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# Copyright (c) 2009, Mark Pilgrim, All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 'AS IS'
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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