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object --+ | basevalidator.BaseValidator --+ | ToLength
Convert a sequence to its length.
For example:
>>> v = ToLength() >>> v("abc") 3 >>> v([1, 2]) 2
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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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