【python】一些tips

• Where is gen_math_ops script in tensorflow?
  from tensorflow.python.ops import gen_math_ops
  

• 因为我是用的是虚拟环境，ipython要在虚拟环境中调用，具体方法：
  calling ipython from a virtualenv
  alias ipy="python -c 'import IPython; IPython.terminal.ipapp.launch_new_instance()'"


  This is a great way of always being sure that the ipython instance always belongs to the virtualenv’s python version.
  This works only on ipython >2.0.

• python的模块可以看到对应的路径

  > import module
  > module.__path__