2020-11-16 04:58:54 +00:00
|
|
|
import re
|
|
|
|
import unicodedata
|
|
|
|
|
2020-11-27 02:18:26 +00:00
|
|
|
def collapse_whitespace(text):
|
2020-11-16 04:58:54 +00:00
|
|
|
'''
|
|
|
|
Replace all whitespace sequences with a single space and strip the ends.
|
|
|
|
'''
|
2020-11-27 02:18:26 +00:00
|
|
|
text = re.sub(r'\s+', ' ', text.strip())
|
|
|
|
return text
|
2020-11-16 04:58:54 +00:00
|
|
|
|
2020-11-27 02:18:26 +00:00
|
|
|
def comma_space_split(text):
|
2020-11-16 04:58:54 +00:00
|
|
|
'''
|
|
|
|
Split the string by commas and spaces, discarding all extra
|
|
|
|
whitespace and blank parts.
|
|
|
|
|
|
|
|
'a b, c,,d' -> ['a', 'b', 'c', 'd']
|
|
|
|
'''
|
2020-11-27 02:18:26 +00:00
|
|
|
if text is None:
|
|
|
|
return text
|
|
|
|
return re.split(r'[ ,]+', text.strip())
|
2020-11-16 04:58:54 +00:00
|
|
|
|
2020-11-27 02:18:47 +00:00
|
|
|
def excise(text, mark_left, mark_right):
|
|
|
|
'''
|
|
|
|
Remove the text between the left and right landmarks, including the
|
|
|
|
landmarks themselves, and return the rest of the text.
|
|
|
|
|
|
|
|
excise('What a wonderful day [soundtrack].mp3', ' [', ']') ->
|
|
|
|
returns 'What a wonderful day.mp3'
|
|
|
|
'''
|
|
|
|
if mark_left in text and mark_right in text:
|
|
|
|
return text.split(mark_left, 1)[0] + text.rsplit(mark_right, 1)[-1]
|
|
|
|
return text
|
|
|
|
|
2020-11-16 04:58:54 +00:00
|
|
|
def pascal_to_loudsnakes(text):
|
|
|
|
'''
|
|
|
|
PascalCase -> PASCAL_CASE
|
|
|
|
HTMLDocument -> HTML_DOCUMENT
|
|
|
|
'''
|
|
|
|
text = re.sub(r'([a-z])([A-Z])', r'\1_\2', text)
|
|
|
|
text = re.sub(r'([A-Z]+)([A-Z][a-z])', r'\1_\2', text)
|
|
|
|
text = text.upper()
|
|
|
|
return text
|
|
|
|
|
|
|
|
def remove_characters(text, characters):
|
|
|
|
translator = {ord(c): None for c in characters}
|
|
|
|
text = text.translate(translator)
|
|
|
|
return text
|
|
|
|
|
|
|
|
def remove_control_characters(text):
|
|
|
|
'''
|
|
|
|
Thanks Alex Quinn
|
|
|
|
https://stackoverflow.com/a/19016117
|
|
|
|
|
|
|
|
unicodedata.category(character) returns some two-character string
|
|
|
|
where if [0] is a C then the character is a control character.
|
|
|
|
'''
|
|
|
|
return ''.join(c for c in text if unicodedata.category(c)[0] != 'C')
|
|
|
|
|
|
|
|
def title_capitalize(text):
|
|
|
|
text = text.strip().title()
|
|
|
|
articles = [
|
|
|
|
'a',
|
|
|
|
'an',
|
|
|
|
'and',
|
|
|
|
'at',
|
|
|
|
'for',
|
|
|
|
'from',
|
|
|
|
'in',
|
|
|
|
'of',
|
|
|
|
'on',
|
|
|
|
'the',
|
|
|
|
'to',
|
|
|
|
]
|
|
|
|
for article in articles:
|
|
|
|
text = re.sub(rf' {article}\b', f' {article.lower()}', text, flags=re.IGNORECASE)
|
|
|
|
|
|
|
|
text = text.replace('\'S', '\'s')
|
|
|
|
|
|
|
|
# Roman numerals. Not handling L, M yet because I don't want to mess up
|
|
|
|
# real words like "mix", but let's take a look at expanding this in
|
|
|
|
# the future.
|
|
|
|
text = re.sub(r'(\b[ivx]+\b)', lambda m: m.group(1).upper(), text, flags=re.IGNORECASE)
|
|
|
|
return text
|