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How to use _replace_substitution method in tox

Best Python code snippet using tox_python

_config.py

Source:_config.py

...373            raise tox.exception.ConfigError(374                "substitution env:%r: unkown environment variable %r" %375                (envkey, envkey))376        return os.environ[envkey]377    def _replace_substitution(self, match):378        sub_key = match.group('substitution_value')379        if sub_key not in self._subs:380            raise tox.exception.ConfigError(381                "substitution key %r not found" % sub_key)382        return '"%s"' % str(self._subs[sub_key]).replace('"', r'\"')383    def _replace_match(self, match):384        g = match.groupdict()385        handlers = {386            'posargs' : self._replace_posargs,387            'env' : self._replace_env,388            None : self._replace_substitution,389            }390        try:391            handler = handlers.get(g['sub_type'])...

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