Counting frequency of each x and y coordinates
if p [ i ] [ 0 ] not in x_axis : NEW_LINE INDENT x_axis [ p [ i ] [ 0 ] ] = 0 ; NEW_LINE DEDENT x_axis [ p [ i ] [ 0 ] ] += 1 ; NEW_LINE if p [ i ] [ 1 ] not in y_axis : NEW_LINE INDENT y_axis [ p [ i ] [ 1 ] ] = 0 ; NEW_LINE DEDENT y_axis [ p [ i ] [ 1 ] ] += 1 ; NEW_LINE