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492 # mark this as non-empty. |
492 # mark this as non-empty. |
493 return True |
493 return True |
494 |
494 |
495 def tovalue(self, context, mapping): |
495 def tovalue(self, context, mapping): |
496 return super(mappingdict, self).tovalue(context, mapping)[0] |
496 return super(mappingdict, self).tovalue(context, mapping)[0] |
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497 |
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498 class mappingnone(wrappedvalue): |
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499 """Wrapper for None, but supports map operation |
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500 |
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501 This represents None of Optional[mappable]. It's similar to |
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502 mapplinglist([]), but the underlying value is not [], but None. |
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503 """ |
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504 |
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505 def __init__(self): |
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506 super(mappingnone, self).__init__(None) |
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507 |
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508 def itermaps(self, context): |
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509 return iter([]) |
497 |
510 |
498 class mappedgenerator(wrapped): |
511 class mappedgenerator(wrapped): |
499 """Wrapper for generator of strings which acts as a list |
512 """Wrapper for generator of strings which acts as a list |
500 |
513 |
501 The function ``make(context, *args)`` should return a generator of |
514 The function ``make(context, *args)`` should return a generator of |