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fix: add input validation to a1z26 encode() #14947

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fix: add input validation to a1z26 encode() #14947

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12 changes: 12 additions & 0 deletions ciphers/a1z26.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,19 @@ def encode(plain: str) -> list[int]:
"""
>>> encode("myname")
[13, 25, 14, 1, 13, 5]
>>> encode("")
Traceback (most recent call last):
...
ValueError: input cannot be empty
>>> encode("Hello")
Traceback (most recent call last):
...
ValueError: input must contain only lowercase letters a-z
"""
if not plain:
raise ValueError("input cannot be empty")
if not plain.islower() or not plain.isalpha():
raise ValueError("input must contain only lowercase letters a-z")
return [ord(elem) - 96 for elem in plain]


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