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docs/metaclasses.rst
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Jon Dufresne
Trim trailing white space throughout the project
10 сен 2018, 23:58
10 сен 2018, 23:58
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Metaclasses ----------- Python 3 and Python 2 syntax for metaclasses are incompatible. ``future`` provides a function (from ``jinja2/_compat.py``) called :func:`with_metaclass` that can assist with specifying metaclasses portably across Py3 and Py2. Use it like this:: from future.utils import with_metaclass class BaseForm(object): pass class FormType(type): pass class Form(with_metaclass(FormType, BaseForm)): pass