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document text.extract

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Mike Fährmann 2015-11-02 15:52:26 +01:00
parent 692d0c95cc
commit 629133a27a
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1 changed files with 19 additions and 0 deletions
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gallery_dl/text.py
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@ -54,6 +54,25 @@ def shorten_filename(filename, limit=255, encoding=sys.getfilesystemencoding()):
return bname.decode(encoding, "ignore") + extension
def extract(txt, begin, end, pos=0):
"""Extract the text between 'begin' and 'end' from 'txt'
Args:
txt: String to search in
begin: First string to be searched for
end: Second string to be searched for after 'begin'
pos: Starting position for searches in 'txt'
Returns:
The string between the two search-strings 'begin' and 'end' beginning
with position 'pos' in 'txt' as well as the position after 'end'.
If at least one of 'begin' or 'end' is not found, None and the original
value of 'pos' is returned
Examples:
extract("abcde", "b", "d") -> "c" , 4
extract("abcde", "b", "d", 3) -> None, 3
"""
try:
first = txt.index(begin, pos) + len(begin)
last = txt.index(end, first)