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25 lines
799 B
Python
25 lines
799 B
Python
def Enum(field, enum, key_func=None):
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"""
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Enum is an adapter to another field: it will just change its display
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attribute. It uses a dictionary to associate a value to another.
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key_func is an optional function with prototype "def func(key)->key"
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which is called to transform key.
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"""
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display = field.createDisplay
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if key_func:
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def createDisplay():
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try:
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key = key_func(field.value)
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return enum[key]
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except LookupError:
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return display()
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else:
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def createDisplay():
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try:
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return enum[field.value]
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except LookupError:
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return display()
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field.createDisplay = createDisplay
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field.getEnum = lambda: enum
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return field
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