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42 lines
889 B
42 lines
889 B
# Copyright (c) 2010-2024 openpyxl
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"""
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Utility list for top level containers that contain one type of element
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Provides the necessary API to read and write XML
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"""
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from openpyxl.xml.functions import Element
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class ElementList(list):
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@property
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def tagname(self):
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raise NotImplementedError
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@property
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def expected_type(self):
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raise NotImplementedError
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@classmethod
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def from_tree(cls, tree):
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l = [cls.expected_type.from_tree(el) for el in tree]
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return cls(l)
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def to_tree(self):
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container = Element(self.tagname)
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for el in self:
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container.append(el.to_tree())
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return container
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def append(self, value):
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if not isinstance(value, self.expected_type):
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raise TypeError(f"Value must of type {self.expected_type} {type(value)} provided")
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super().append(value)
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