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a
Decode the {encoding} encoded bytes-like object or ASCII string s.
Optional casefold is a flag specifying whether a lowercase alphabet is
acceptable as input. For security purposes, the default is False.
{extra_args}
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the input is incorrectly padded or if there are non-alphabet
characters present in the input.
a
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letter O (oh), and for optional mapping of the digit 1 (one) to
either the letter I (eye) or letter L (el). The optional argument
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