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def get_scale_ratio(model_page_info, page):
pix = page.get_pixmap(dpi=72)
pymu_width = int(pix.w)
pymu_height = int(pix.h)
width_from_json = model_page_info['page_info']['width']
height_from_json = model_page_info['page_info']['height']
horizontal_scale_ratio = width_from_json / pymu_width
vertical_scale_ratio = height_from_json / pymu_height
return horizontal_scale_ratio, vertical_scale_ratio
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