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object --+ | basevalidator.BaseValidator --+ | ToIndex
Convert to the index of the
Length limitations are expressed as (inclusive) minimum and maximum sizes. This is most useful for strings, but could be used for lists.
For example:
>>> v = ToIndex(['a', 'b', 'c']) >>> v('a') 0 >>> v('d') Traceback (most recent call last): ... ValueError: 'd' is not a member of ['a', 'b', 'c']
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Inherited from Inherited from |
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Inherited from |
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Transform a value to the desired form. This is the workhorse method that is called by convert to transform passed values. As such, errors are signalled by throwing a meaningful exception. This is one of the obvious and easiest places to customize behaviour by overriding in a subclass.
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