Python 3.6+secretsfunction

secrets.token_urlsafe()

tokens

Returns a random URL-safe Base64 token, for password reset links, API keys and invitations.

Syntax

secrets.token_urlsafe(nbytes=None) -> str

The argument is a number of random bytes, and the string comes out about 1.3 times longer: token_urlsafe(16) gives 22 characters. The alphabet is letters, digits, '-' and '_' with no trailing '=', so the token goes into a URL without encoding. Strength depends on nbytes, not on the visible length.

Examples

import secrets
t = secrets.token_urlsafe(16)
print(len(t))  # → 22
print('=' in t, '+' in t, '/' in t)  # → False False False
print(t)  # → ? случайная строка

See also

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