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fix: raise ValueError in encode() for non-lowercase input #14936

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fix: raise ValueError in encode() for non-lowercase input #14936

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3e23055
fix: raise ValueError in encode() for non-lowercase input
alisatwat3 Jul 14, 2026
9ff2a0b
resolved doctest
alisatwat3 Jul 14, 2026
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6 changes: 6 additions & 0 deletions ciphers/a1z26.py
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Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,13 @@ def encode(plain: str) -> list[int]:
"""
>>> encode("myname")
[13, 25, 14, 1, 13, 5]
>>> encode("ABCD")
Traceback (most recent call last):
...
ValueError: plain must contain only lowercase letters (a-z)
"""
if not plain.islower() or not plain.isalpha():
raise ValueError("plain must contain only lowercase letters (a-z)")
return [ord(elem) - 96 for elem in plain]


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