As a beginner I initiated python with IDLE: You write a code, than save the file and run with F5.
In the past days I asked how to run scripts. I get good answers as to begin the programm with "#!/path/to/python ". It's good but not for all files e.g. files in /home/myname/Dropbox/programs/python.... are not accessible with this method. And I want to know how to deal with this problem.