Sorting CSV in Python

Question

I assumed sorting a CSV file on multiple text/numeric fields using Python would be a problem that was already solved. But I can\'t find any example code anywhere, except for

Answer 1

Here's the convert() that's missing from Robert's fix of Alex's answer:

>>> def convert(convert_funcs, seq):
...    return [
...        item if func is None else func(item)
...        for func, item in zip(convert_funcs, seq)
...        ]
...
>>> convert(
...     (None, float, lambda x: x.strip().lower()),
...     [" text ", "123.45", " TEXT "]
...     )
[' text ', 123.45, 'text']
>>>

I've changed the name of the first arg to highlight that the per-columns function can do what you need, not merely type-coercion. None is used to indicate no conversion.