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42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
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from __future__ import unicode_literals
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import re
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class StringProcessor(object):
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"""
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This class defines method to process strings in the most
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efficient way. Ideally all the methods below use unicode strings
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for both input and output.
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"""
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@classmethod
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def replace_non_letters_non_numbers_with_whitespace(cls, a_string):
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"""
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This function replaces any sequence of non letters and non
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numbers with a single white space.
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"""
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regex = re.compile(r"(?ui)\W")
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return regex.sub(" ", a_string)
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@classmethod
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def strip(cls, a_string):
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"""
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This function strips leading and trailing white space.
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"""
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return a_string.strip()
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@classmethod
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def to_lower_case(cls, a_string):
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"""
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This function returns the lower-cased version of the string given.
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"""
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return a_string.lower()
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@classmethod
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def to_upper_case(cls, a_string):
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"""
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This function returns the upper-cased version of the string given.
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"""
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return a_string.upper()
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