Rescale TikZ coordinates

rescale.py

import re


def main(filename_in, filename_out):

    re_coord_pattern = "\((?P<x>[-.\d]*),(?P<y>[-.\d]*)\)"
    re_coord = re.compile(re_coord_pattern)

    with open(filename_in, "r") as f_in, open(filename_out, "w") as f_out:
        for line in f_in:
            line_processed = line.strip()
            line_processed = re_coord.sub(prettify_xy, line_processed)
            print >> f_out, line_processed


def prettify_xy(m):
    x = float(m.group("x"))
    y = float(m.group("y"))
    x /= +1000
    y /= -1000
    return "(%+07.4f, %+07.4f)" % (x, y)


# Call main function
main("file_in.tex", "file_out.tex")