How to run a python script from IDLE interactive shell? -

How do I run a Python script from the IDE Interactive Shell?

The following triggers an error:

  & gt; & Gt; & Gt; Python helloworld.py syntax error: invalid syntax    
 
 
 Built-in function:    
  execfile ('helloworld.py')   
 This can not normally be called with logic. But here is a workaround:  
  import sys sys.argv = ['helloworld.py', 'arg'] # argv [0] still the script name execfile ('helloworld.py' ) Deprecated since 2.6:    
  Import os.popen ('python helloworld.py') #   
 < P> Just to run the program os.popen ('python helloworld.py'). Read () # You also get stdout   
 with argument:  
  os Advance use:      Import (python helloworld.py arg)   Subprocess subprances Cole (['Python', 'Hairlourldged']) # Bus Programs Upprocessor.   
 With the argument:  
  Sub process . (['Python', 'helloworld.py', 'Arg'])   
 Read the docs for details: -)  
 
 The original  Helloworld.py :  
  has been tested with the import system if len (sys.argv) & Gt; 1: print (sys.argv [1])