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32 lines
971 B
Python
32 lines
971 B
Python
import re
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def naturalize(value, max_length=None, integer_places=8):
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"""
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Take an alphanumeric string and prepend all integers to `integer_places` places to ensure the strings
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are ordered naturally. For example:
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site9router21
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site10router4
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site10router19
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becomes:
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site00000009router00000021
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site00000010router00000004
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site00000010router00000019
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:param value: The value to be naturalized
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:param max_length: The maximum length of the returned string. Characters beyond this length will be stripped.
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:param integer_places: The number of places to which each integer will be expanded. (Default: 8)
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"""
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output = []
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for segment in re.split(r'(\d+)', value):
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if segment.isdigit():
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output.append(segment.rjust(integer_places, '0'))
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elif segment:
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output.append(segment)
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ret = ''.join(output)
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return ret[:max_length] if max_length else ret
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