easy_install.py 文件源码

python
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项目:my-first-blog 作者: AnkurBegining 项目源码 文件源码
def _expand(self, *attrs):
        config_vars = self.get_finalized_command('install').config_vars

        if self.prefix:
            # Set default install_dir/scripts from --prefix
            config_vars = config_vars.copy()
            config_vars['base'] = self.prefix
            scheme = self.INSTALL_SCHEMES.get(os.name, self.DEFAULT_SCHEME)
            for attr, val in scheme.items():
                if getattr(self, attr, None) is None:
                    setattr(self, attr, val)

        from distutils.util import subst_vars

        for attr in attrs:
            val = getattr(self, attr)
            if val is not None:
                val = subst_vars(val, config_vars)
                if os.name == 'posix':
                    val = os.path.expanduser(val)
                setattr(self, attr, val)
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