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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def set_PLOS_2column_fig_style(self, ratio=1):
        '''figure size corresponding to Plos 2 columns'''
        plt.rcParams.update({
            'figure.figsize' : [self.PLOSwidth2Col, self.PLOSwidth2Col*ratio],
        })