human
Solve the following python programming problem given the following code:
def _ConvertFileProtoToFileDescriptor(self, file_proto) : 
    'Creates a FileDescriptor from a proto or returns a cached copy.

    This method also has the side effect of loading all the symbols found in
    the file into the appropriate dictionaries in the pool.

    Args:
      file_proto: The proto to convert.

    Returns:
      A FileDescriptor matching the passed in proto.
    ' 
    if (file_proto.name not in self._file_descriptors) : 
        built_deps = list (self._GetDeps (file_proto.dependency)) 
        direct_deps = [self.FindFileByName (n) for n in file_proto.dependency] 
        file_descriptor = descriptor.FileDescriptor (name = file_proto.name, package = file_proto.package, syntax = file_proto.syntax, options = file_proto.options, serialized_pb = file_proto.SerializeToString (), dependencies = direct_deps) 
        if _USE_C_DESCRIPTORS : 
            def _AddMessageDescriptor(message_desc) : 
                self._descriptors [message_desc.full_name] = message_desc 
                for nested in message_desc.nested_types : 
                    _AddMessageDescriptor (nested) 
for enum_type in message_desc.enum_types : 
                    _AddEnumDescriptor (enum_type) 
def _AddEnumDescriptor(enum_desc) : 
                self._enum_descriptors [enum_desc.full_name] = enum_desc 
for message_type in list (file_descriptor.message_types_by_name.values ()) : 
                _AddMessageDescriptor (message_type) 
for enum_type in list (file_descriptor.enum_types_by_name.values ()) : 
                _AddEnumDescriptor (enum_type) 
else : 
            scope = { 
                
} 
            for dependency in built_deps : 
                scope.update (self._ExtractSymbols (list (dependency.message_types_by_name.values ()))) 
                scope.update (((_PrefixWithDot (enum.full_name), enum) for enum in list (dependency.enum_types_by_name.values ()))) 
for message_type in file_proto.message_type : 
                message_desc = self._ConvertMessageDescriptor (message_type,...

    
    

    Fix the buggy line: desc_proto_prefix = _PrefixWithDot (extension_desc.package)
assistant
#Here is Python program to fix the buggy line: desc_proto_prefix = _PrefixWithDot (extension_desc.

desc_proto_prefix = _PrefixWithDot (file_proto.package)