Reference for passing Python Parameters

For Python values. I encountered a problem today, abstracted as the test I code below

   1: #!/usr/bin/python2.6                                                                                                                  

   2:  

   3: def FuncTest1(str_list):

   4:   path = '/home/test/file'

   5:   str_list = path.split('/')

   6:  

   7: def FuncTest2(str_list):

   8:   path = '/home/test/file'

   9:   str_list.extend(path.split('/'))

  10:  

  11:  

  12: str_list = []

  13: FuncTest1(str_list)

  14: print 'FuncTest1: %s' % str_list

  15: str_list = []

  16: FuncTest2(str_list)

  17: print 'FuncTest2:%s' % str_list

 

That is, whether to pass the value or reference the test parameter.

The test result is:

 

In this analysis, the python parameters are passed with values. For a simple type, it refers to the reference (or pointer) of an object that is passed for a complex type or object ).

Therefore, for the above situation,

In functest1, the passed str_list points to a new result. It can be considered that the point of the temporary object is modified in the function. The external function remains unchanged.

In functest2, a method call is executed for str_list, and its modification is valid for incoming requests.

This is similar to Java.