Toutes les chaines de caractères sont stockées à des adresses mémoires différentes, sauf si elles s’apparentent à une variable : minuscules, underscores et chiffres.
a = 'hello' b = 'hello' print(id(a)) print(id(b))
101223256 101223256
a = 'hello, world!' b = 'hello, world!' print(id(a)) print(id(b))
101300784 101314608
a = 'hello_world' b = 'hello_world' print(id(a)) print(id(b))
101300720 101300720
a = '_this_is_a_long_string_that_could_be_used_as_an_identifier' b = '_this_is_a_long_string_that_could_be_used_as_an_identifier' print(id(a)) print(id(b))
98854928 98854928
a = '1_hello_world' b = '1_hello_world' print(id(a)) print(id(b))
101300080 101300080
a = '1 hello world' b = '1 hello world' print(id(a)) print(id(b))
101301488 101316528
a = 'this_is_a_long_string'
b = 'this_is_a_long_string'
print('a==b:', a == b)
print('a is b:', a is b)
a==b: True a is b: True
a = 'hello world'
b = 'hello world'
print('a==b:', a==b)
print('a is b:', a is b)
a==b: True a is b: False