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Что выведет этот код?

Строки длиной до 4096 (до версии 3.7 длиной до 21) кэшируются.
s1 = "a" * 4096
s2 = "a" * 4096

print(s1 is s2) # True

s1 = "a" * 4097
s2 = "a" * 4097

print(s1 is s2) # False


Строки не кэшируются, если они созданы в рантайме:
s1 = "python"
s2 = "".join(["p", "y", "t", "h", "o", "n"]) # выражение выполняется в рантайме

print(s1 is s2) # False


Так же следует понимать, что это может поменяться в любой момент и лучше сравнивать строки через ==, а не через is.

#string #строки



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Что выведет этот код?

Строки длиной до 4096 (до версии 3.7 длиной до 21) кэшируются.
s1 = "a" * 4096
s2 = "a" * 4096

print(s1 is s2) # True

s1 = "a" * 4097
s2 = "a" * 4097

print(s1 is s2) # False


Строки не кэшируются, если они созданы в рантайме:
s1 = "python"
s2 = "".join(["p", "y", "t", "h", "o", "n"]) # выражение выполняется в рантайме

print(s1 is s2) # False


Так же следует понимать, что это может поменяться в любой момент и лучше сравнивать строки через ==, а не через is.

#string #строки

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