python - How to start a file that has a period in front of it? -

I am using os.startfile to start the bat, but I can not find any way to start a bit file Explore its name.

What do I want to achieve:

  Import import subprocess OS stafffile ('C: \\ folder \\ proov \\' batch.bat ')    
 
 
 Use raw string:  
  import OS os .startfile (r'C: \ folder \ proov \ .batch.bat ')   
 Note that for a batch file, you can simply:  
  Import OS OS System (r'C: \ folder \ proov.batch.bat ')   
 or  
  import subprocess subprances. Cole (RC: \ folder \ prow .. batch.bat ')