Case Insensitive Python string split() method

Question

I have 2 strings

a = "abc feat. def"
b = "abc Feat. def"

I want to retrieve the string before the word feat. or Feat.

This is what I'm doing,

a.split("feat.", 1)[0].rstrip()

This returns abc. But how can I perform a case insensitive search using split delimiter?

This is what I've tried so far

b.split("feat." or "Feat.", 1)[0].rstrip()

Output - abc Feat. def

b.split("feat." and "Feat.", 1)[0].rstrip()

Output - abc

a.split("feat." and "Feat.", 1)[0].rstrip()

Output - abc feat. def.

a.split("feat." or "Feat.", 1)[0].rstrip()

Output - abc

Why is this difference with and and or in both the cases?

Answer 1

Use a regex instead:

>>> import re
>>> regex = re.compile(r"\s*feat\.\s*", flags=re.I)
>>> regex.split("abc feat. def")
['abc', 'def']
>>> regex.split("abc Feat. def")
['abc', 'def']

or, if you don't want to allow FEAT. or fEAT. (which this regex would):

>>> regex = re.compile(r"\s*[Ff]eat\.\s*")

Answer 2

a[0:a.lower().find("feat.")].rstrip() would do.

anding

"string1" and "string2" and ... and "stringN"

returns the the last string.

oring

"string1" or "string2" or ... or "stringN"

would return the first string.

Short-circuit evaluation.