Use str.replace
.
>>> papa.replace('papa', '')
' is a good man'
>>> app.replace('papa', '')
'app is important'
Alternatively use re
and use regular expressions. This will allow the removal of leading/trailing spaces.
>>> import re
>>> papa = 'papa is a good man'
>>> app = 'app is important'
>>> papa3 = 'papa is a papa, and papa'
>>>
>>> patt = re.compile('(\s*)papa(\s*)')
>>> patt.sub('\\1mama\\2', papa)
'mama is a good man'
>>> patt.sub('\\1mama\\2', papa3)
'mama is a mama, and mama'
>>> patt.sub('', papa3)
'is a, and'