Variable alternates whether or not it exists in Python Debugger

Question

Can anyone explain this? (Python 2.7, Django 1.7)

foo = data[\'selected_items\']
(Pdb) foo
(Pdb) *** NameError: name \'foo\' is not defined
foo
(Pdb) u\'1,2\'
fo         


        

Answer 1

When the statement appears in PDB, it hasn't actually been executed yet. It will be executed once you use 'next'.