SourceFileLoader失败。我应该如何指定父模块，以免发生这种情况。例如，
>>> from importlib.machinery import SourceFileLoader
>>> SourceFileLoader('t_sne', 'venv/lib/python3.5/site-packages/sklearn/manifold/t_sne.py').load_module()
---------------------------------------------------------------------------
SystemError Traceback (most recent call last)
<ipython-input-3-553b4ae077de> in <module>
----> 1 SourceFileLoader('t_sne', 'venv/lib/python3.5/site-packages/sklearn/manifold/t_sne.py').load_module()
/usr/lib/python3.5/importlib/_bootstrap_external.py in _check_name_wrapper(self, name, *args, **kwargs)
/usr/lib/python3.5/importlib/_bootstrap_external.py in load_module(self, fullname)
/usr/lib/python3.5/importlib/_bootstrap_external.py in load_module(self, fullname)
/usr/lib/python3.5/importlib/_bootstrap.py in _load_module_shim(self, fullname)
/usr/lib/python3.5/importlib/_bootstrap.py in _load(spec)
/usr/lib/python3.5/importlib/_bootstrap.py in _load_unlocked(spec)
/usr/lib/python3.5/importlib/_bootstrap_external.py in exec_module(self, module)
/usr/lib/python3.5/importlib/_bootstrap.py in _call_with_frames_removed(f, *args, **kwds)
~/PycharmProjects/codemap/venv/lib/python3.5/site-packages/sklearn/manifold/t_sne.py in <module>
17 from scipy.spatial.distance import squareform
18 from scipy.sparse import csr_matrix
---> 19 from ..neighbors import NearestNeighbors
20 from ..base import BaseEstimator
21 from ..utils import check_array
SystemError: Parent module '' not loaded, cannot perform relative import
首先我还有其他以这种方式加载模块的原因，因此该解决方案应允许我从文件路径加载模块并处理文件中的相对导入。