30 lines
721 B
Plaintext
30 lines
721 B
Plaintext
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types implicites et catégories
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==============================
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Sometimes it is a good choice to use strings as implicit types.
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Some times not. Let us have some types :
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::
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types = ["booltype", "stringtype", "floattype"]
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if "booltype" in types:
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print type
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But we loose an information there : all these string are the same type
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and not a string type.
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::
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class NormalizeType(str):
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pass
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typenames = ("booltype", "stringtype", "floattype")
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globs = globals()
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for typename in typenames:
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globs[typename] = NormalizeType(typename)
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# and for example
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if type(obj) == NormalizeType:
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print type
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Now we don't rely on a list, the type names present here are just for the
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types's build. We rely on classes as sets.
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