Python - changing element value of a list in list

Question

I have a list in list. All the values are False. I have to change value to True of a very specific one.

s=[[False,False,False,False]
   [False,False,False,False]
   [False,False,False,False]
   [False,False,False,False]]

I want to change it into this:

s=[[False,False,False,False]
   [False,False,False,False]
   [False,True,False,False]
   [False,False,False,False]]

P.s.: I tried doing this:

s[2][1]=True

But i got this:

[[False,True,False,False]
[False,True,False,False]
[False,True,False,False]
[False,True,False,False]]

What you've posted is a `TypeError`, your assignment to `s` isn't valid therefore cannot reflect your actual data. — jonrsharpe, Nov 05 '15 at 13:15

Avión · Answer 1 · 2015-11-05T13:16:41.923

0

Add commas in order to build your matrix.

s=[[False,False,False,False],
   [False,False,False,False],
   [False,False,False,False],
   [False,False,False,False]]

s[2][1]=True

for i in s:
    print i

Outputs:

[False, False, False, False]
[False, False, False, False]
[False, True, False, False]
[False, False, False, False]

edited Nov 05 '15 at 13:16

answered Nov 05 '15 at 13:08

Avión

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1. It's *"com**m**as"*. 2. The OP's code won't actually run, without the commas you get a `TypeError`, not an issue with references. – jonrsharpe Nov 05 '15 at 13:16

Python - changing element value of a list in list

1 Answers1