title: Importing from sub-folder hierarchy in python
body: <p>i am trying to import specified modules from test_file hierarchy </p>
  
  <p>something like :</p>
  
  <pre><code>test_case1.py
  test_subsuite_2
  test_sub_2.1.1.py
  test_suite2
  </code></pre>
  
  <p>is it possible to do a run import on this hierarchy </p>
  
  <pre><code>/project/main.py
  /project/test_files
  </code></pre>
  
  <p>test_files folder hierarchy is like this :</p>
  
  <pre><code>test_files
      test_suite1
          test_case1.py
          test_subsuite_1
              test_sub1_1.py
              test_sub1_2.py
          test_subsuite_2
              test_subsuite_2_1
                  test_sub_2.1.1.py
              test_sub2_1.py
              test_sub3_2.py
  
      test_suite2
          test_case2.py
          test_subsuite2_1
              test_sub21_1.py
              test_sub21_2.py
          test_subsuite2_2
              test_sub22_1.py
              test_sub23_2.py
  </code></pre>