Why str.strip doesn't work properly?

Question

python interpret the code line below:
'They bought a car, and a horse'.strip(".,").lower().split()

like this:
['they', 'bought', 'a', 'car,', 'and', 'a', 'horse']

why str.strip do not remove ',' next to 'car'

Answer 1

strip removes characters from the beginning and end of a string.
You can use str.replace() method

'They bought a car, and a horse'.replace(",","").lower().split()