Python: Type Errors

Question

This is not the real logic of my program, just a simplified version of it. Any help will be really appreciated.

My question is I am maintaining a state like this:

next_state = (state,self.visited_states)
# where self.visited_states = (False, False)
# I want the state to be in this form ((1,1),(False, False))

I need to change the boolean values to True when one of the state is visited. So I was trying something like this:

self.visited_states[0] = True.

I got an error as follows:

TypeError: 'tuple' object does not support item assignment

Grijesh Chauhan · Accepted Answer · 2013-09-24 05:52:31Z

3

tuple are immutable type you can't modify. In expression:

self.visited_states[0] = True.
        ^
        should not be a tuple

If you wants to change it take visited_states as list.

self.visited_states = [False, False]

answered Sep 24, 2013 at 5:52

Grijesh Chauhan

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