How to remove digits from the end of a string in Python 3.x?

问题

i've got a problem.I want to remove digits from the end of a string,but i have no idea.Can the split() method work?How can i make that work?The initial string is like 'asdfg123',and i only want 'asdfg' instead.Thanks for your help!

回答1:

No, split would not work, because split only can work with a fixed string to split on.

You could use the str.rstrip() method:

import string

cleaned = yourstring.rstrip(string.digits)

This uses the string.digits constant as a convenient definition of what needs to be removed.

or you could use a regular expression to replace digits at the end with an empty string:

import re

cleaned = re.sub(r'\d+$', '', yourstring)

回答2:

You can use str.rstrip with digit characters you want to remove trailing characters of the string:

>>> 'asdfg123'.rstrip('0123456789')
'asdfg'

Alternatively, you can use string.digits instead of '0123456789':

>>> import string
>>> string.digits
'0123456789'
>>> 'asdfg123'.rstrip(string.digits)
'asdfg'

来源：https://stackoverflow.com/questions/40691451/how-to-remove-digits-from-the-end-of-a-string-in-python-3-x