Op 12/12/2023 om 9:22 schreef Steve GS via Python-list:
With all these suggestions on
how to fix it, no one seems to
answer why it fails only when
entering a two-digit number.
One and three work fine when
comparing with str values. It
is interesting that the
leading 0 on a two digit
worked. Still, one digit and
three digit work but not two.
Three-digit numbers work because you're comparing to another three-digit
numbers. When two integer numbers have the same number of digits, their
lexicographical ordering matches their numeric ordering.
One-digit numbers don't work fine:
>>> "5" < "400"
False
even though we can construct cases where it seems as if they do:
>>> "1" < "400"
True
Two-digit numbers sometimes seem to work:
>>> "30" < "400"
True
But other times clearly don't work:
>>> "50" < "400"
False
String comparison first looks at the first characters of both operands.
If they are different (as in the examples above), their ordering is used
regardless of all the other characters that come after, and regardless
of the length of the string. Try working through some examples (make
sure to pick examples with a wide variety of first digits) and you'll
see why it sometimes seems to work, but very unreliably.
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