You have only two of each number and letter. You need three entries of 0 to get (0, 0, 0)
You probably want to have just all_columns = ['0', 'z', '-z'] then use combinations with replacement.
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You have only two of each number and letter. You need three entries of 0 to get (0, 0, 0)
You probably want to have just all_columns = ['0', 'z', '-z'] then use combinations with replacement.