OpenSlides/openslides/utils/utils.py

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import re
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import roman
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CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_1 = re.compile('(.)([A-Z][a-z]+)')
CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_2 = re.compile('([a-z0-9])([A-Z])')
def convert_camel_case_to_pseudo_snake_case(text):
"""
Converts camel case to pseudo snake case using hyphen instead of
underscore.
E. g. ThisText is converted to this-text.
Credits: epost (http://stackoverflow.com/a/1176023)
"""
s1 = CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_1.sub(r'\1-\2', text)
return CAMEL_CASE_TO_PSEUDO_SNAKE_CASE_CONVERSION_REGEX_2.sub(r'\1-\2', s1).lower()
def to_roman(number):
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"""
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Converts an arabic number within range from 1 to 4999 to the
corresponding roman number. Returns None on error conditions.
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"""
try:
return roman.toRoman(number)
except (roman.NotIntegerError, roman.OutOfRangeError):
return None