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style.rebuild

Function: style.rebuild ():

This causes all styles to be rebuilt, making it possible to change styles outside of init code. There are several caveats:

init python:
    font = "DejaVuSans.ttf"
    style.default.font = font

    def change_font(newfont):
         global font
         font = newfont
         style.default.font = newfont
         style.rebuild()

label after_load:
    python:
        style.default.font = font
        style.rebuild()

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