widgets.py


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import wtforms.widgets.core


class TextArea(wtforms.widgets.core.TextArea):
    def __init__(self, **kwargs):
        self.kwargs = kwargs

    def __call__(self, field, **kwargs):
        for arg in self.kwargs:
            if arg not in kwargs:
                kwargs[arg] = self.kwargs[arg]
        return super(TextArea, self).__call__(field, **kwargs)