upper() return string

lower()

isupper(), isalpha(),isalnum(),isspace(),isdecimal() return bool

islower(),istitle()

spam = 'hello world'
print spam.upper()

startwith() . return bool

endswith()

'hello world'.startwith('hello')
True

join() . return a string combine with a list of strings

','.join('cat','rats','dogs')
>>>'cat,rats,dogs'

split() . return a list of strings

rjust(),ljust() return a string padded with space

'hello'.rjust(10)
>>>'     hello'
len('     hello')
>>>10
'hello'.rjust(20,'*')
>>>'***************hello'

center()

strip(),lstrip(),rstrip() . return a string with whitespace stripped off the sides

'    hello'.strip()
>>>'hello'
'SpamSpamBaconSpamEggsSpamSpam'.strip('ampS')
>>>'BaconSpamEggs'

replace(),

replace() doesn't modify the original string, but returns a copy. So you need the assignment for the code to have any effect.

>>> string="abc&def#ghi"
>>> for ch in ['&','#']:
...   if ch in string:
...      string=string.replace(ch,"\\"+ch)

spam = 'hello there'
spam.replace('e','xyz')
>>>'hxyzllo thxyzrxyz')
#will replace all the item

pyperclip

use pip to install

import pyperclip

has copy() and paste() function for using the clipboard

index()

find()

uname = 'Linux #1 SMP Tue Feb 12 02:46:46 UTC 2008'

1:
'Linux' in uname 
>> True
2:
uname.find('Linux')
>> 0(yes) or -1(no)
uname.index('Linux')
>> number or error exception