a python script for writing furigana in markdown

markdown_furigana.py

import fileinput
import re
import sys
```
eg. [東京]{とうきょう} -> <ruby>東京<rp>（</rp><rt>とうきょう</rt><rp>）</rp></ruby>
```
def furiganize(line):
    # (?<!\\) means don't match if preceeded by a backslash
    return re.sub(ur'(?<!\\)\[(.*?)\]\{(.*?)\}', ur'<ruby>\1<rp>（</rp><rt>\2</rt><rp>）</rp></ruby>', line.rstrip())
    
for line in fileinput.input(sys.argv[1:], inplace=True):
    print(furiganize(line))