Comment obtenir un sous-chaîne d'une chaîne en Python

99

>>> x = "Hello World!" >>> x[2:] 'llo World!' >>> x[:2] 'He' >>> x[:-2] 'Hello Worl' >>> x[-2:] 'd!' >>> x[2:-2] 'llo Worl' 

85

some_string[::-1] 

"H-e-l-l-o- -W-o-r-l-d"[::2] # outputs "Hello World" 

76

s = Substr(s, beginning, LENGTH) 

s = s[ beginning : beginning + LENGTH] 

64

>>> x = "Hello World!" >>> x 'Hello World!' >>> x[:] 'Hello World!' >>> x==x[:] True >>>