[Python] How to convert matrix of binary numbers into matrix of strings/symbols? (Python/Sage)

I have a matrix in python consisting of 1s and 0s. As an example:

m= [1 0 1]
[1 1 1]
[0 0 1]


I would like to convert it to a matrix of symbols/strings. An example of the output I'm looking for :

m_str= [A 0 C]
[A B C]
[0 0 C]


I thought I might be able to just... multiply the matrix by a vector of strings [A, B, C] and have it pop out the above matrix, calculating Ax0 to 0 and Ax1 to A. However looking into it, this is not a matter of simply saying "multiply them and print".

Currently my code is just yelling at me that you can't do:

Mlet=vector (["A","B","C"])


Which in hindsight is obvious.

Is there a way to make this work that is better than iterating through every element of the matrix going "if 1, put the letter in its place"? Technically I don't even need it to remain as a matrix. A string for each row/column is sufficient.

I'm using python with Sage Math through CoCal (personal server), but truly have little experience with python and even less with Sage. (It did what I needed to GET my matrix, but thats all I know.)

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