Re: Why this fails??

[Dave Angel]

On 02/29/2012 04:07 AM, Smiley 4321 wrote:
Why below fails -
----
#!/usr/bin/python

import pickle

class MyClass(object):

     Field1 = None
     Field2 = None

     def __init__(self, dictionary):
         self.__dict__.update(dictionary)

     my_List = {'Field1': 'Apple', 'Field2': 'Orange'}
     myInst = MyClass(my_List)

     with open('/tmp/readfile.pkl', 'wb') as f:
          pickle.dump(myInst, f)
----

with below error messges -

$ ./pickleClassWrite.py
Traceback (most recent call last):
   File "./pickleClassWrite.py", line 5, in<module>
     class MyClass(object):
   File "./pickleClassWrite.py", line 14, in MyClass
     myInst = MyClass(my_List)
NameError: name 'MyClass' is not defined
---


The reason for the error is that you're trying to use the class (by 
name) before its definition is complete.

The cause is that the code starting with the line "my_list = {Field1... 
" should have been dedented to be at top-level.  You don't want those 
last 4 lines to be inside the class.





--

DaveA

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