python replacement

import re
repl_str='{a:"remove_quotes({{123}})"}'
repl = re.compile(r'\"remove_quotes\((\S+)\)\"')
repl.subn(r'\1', repl_str)

import re
repl_str='{a:"{{123}}}"}'
repl = re.compile(r'\"{{{(\S+)}}}\"')
v,ok=repl.subn(r'{{\1}}', repl_str)