Checking 2 matrix can be Multiply or not - ERROR

Question

Dear Friends

Would you let me know why I receive ERROR ?

CODE:
https://code.sololearn.com/ceCJB7Ku0uj1/#py

ERROR:
https://www.dropbox.com/s/898qgzye6z9515r/Untitled.png?dl=0

Answer 1

all your lines are indented which the shouldnt be.
Also its kind of unclear what the code is supposed to accompish. You are storing the matrixes as string and you have i variable implemented before the loop and you are checking if first letter in the string is equal to integer 0

Answer 2

I modified extra spaces in each line also added a missing = to line 9 but received new ERROR

Answer 3

can you copy paste the error?

Answer 4

I modified again , removes () from a ([0]) to be a[0]

new ERROR

https://www.dropbox.com/s/liruxvwlrdgvx0c/Untitled.jpg?dl=0

Answer 5

well as i mentioned before you are attepting to work with strings and not lists like you probably should. Also I can't understand what you are trying to accomplish since i cant understand the language in the comments

Answer 6

I found the right code

https://code.sololearn.com/cksr0eLD8HtW/#py

One of the wrong codes was because I wanted to replace "len" with another way to find length of string

Answer 7

The goal of this code is to find out whether 2 matrix can be multiply or not

The mathematical rule is columns of matrix "a" should be equal to rows of matrix "b"