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util.randrange: expand docstring

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SomberNight
2023-08-16 16:32:42 +00:00
parent 5e1e7dd9b3
commit 2c2e3f8ca4
1 changed files with 3 additions and 1 deletions
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electrum/util.py
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@@ -1724,7 +1724,9 @@ def resolve_dns_srv(host: str):
def randrange(bound: int) -> int: def randrange(bound: int) -> int:
"""Return a random integer k such that 1 <= k < bound, uniformly """Return a random integer k such that 1 <= k < bound, uniformly
distributed across that range.""" distributed across that range.
This is guaranteed to be cryptographically strong.
"""
# secrets.randbelow(bound) returns a random int: 0 <= r < bound, # secrets.randbelow(bound) returns a random int: 0 <= r < bound,
# hence transformations: # hence transformations:
return secrets.randbelow(bound - 1) + 1 return secrets.randbelow(bound - 1) + 1