支持2.7的远程加载模块

ゝ一纸荒年。 2022-09-05 05:25 134阅读 0赞

笔记：

# coding:utf8
    ''' python2.7 支持的远程导入器 '''
    
    import sys
    import imp
    import urllib2
    
    class UrlMetaFinder(object):
        def __init__(self, baseurl):
            self._baseurl = baseurl
    
    
        def find_module(self, fullname, path=None):
            if path is None:
                baseurl = self._baseurl
            else:
                # 不是原定义的url就直接返回不存在
                if not path.startswith(self._baseurl):
                    return None
                baseurl = path
    
            try:
                loader = UrlMetaLoader(baseurl)
                loader.load_module(fullname)
                return loader
            except Exception:
                return None
    
    class UrlMetaLoader(object):
        def __init__(self, baseurl):
            self.baseurl = baseurl
    
        def get_code(self, fullname):
            f = urllib2.urlopen(self.get_filename(fullname))
            # f = urllib2.urlencode(self.get_filename(fullname))
            return f.read()
    
        def load_module(self, fullname):
            code = self.get_code(fullname)
            mod = sys.modules.setdefault(fullname, imp.new_module(fullname))
            mod.__file__ = self.get_filename(fullname)
            mod.__loader__ = self
            mod.__package__ = fullname
            exec(code, mod.__dict__)
            return mod
    
        def get_data(self):
            pass
        
        def execute_module(self, module):
            pass
    
        def get_filename(self, fullname):
            return self.baseurl + fullname + '.py'
    
    def install_meta(address):
        finder = UrlMetaFinder(address)
        sys.meta_path.append(finder)