python remove duplicate spaces from string code example

Example 1: replace multiple spaces with single space python

' '.join(mystring.split())

Example 2: python remove duplicates words from string

def unique_list(l):
    ulist = []
    [ulist.append(x) for x in l if x not in ulist]
    return ulist

a="calvin klein design dress calvin klein"
a=' '.join(unique_list(a.split()))

Example 3: trim multiple spaces in python

>>> import re
>>> re.sub(' +', ' ', 'The     quick brown    fox')
'The quick brown fox'