problem with the following piece of code

[himani bansal]

can you explain the problem with the following piece of code-
>>> def func(n=[]):
#playing around
pass
>>> func([1,2,3])
>>> func()
>>> n

[Luuk]

I do see different results:

C:\temp>python
ActivePython 3.5.3.3505 (ActiveState Software Inc.) based on
Python 3.5.3 (default, May 16 2017, 01:12:46) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> def func(n=[]):
... #playing around
...   pass
...
>>> func([1,2,3])
>>> func()
>>> n
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
NameError: name 'n' is not defined
>>>

You are also not explaining what 'pass' should do?