Why won't my code run this is the assignment and my code

The purpose of this assignment is: - Construct logical circuits from compound logic statements. Write a program that implements a parallel adder that is capable of adding two 3-digit binary numbers. Begin by writing a HALF_ADDER method that takes 2 binary digits and returns an ordered pair in the form (sum, carry). Print an input/output table like the one shown in your text. Next, write a FULL_ADDER method that takes 3 binary digits and returns an ordered pair in the form (sum, carry). Print an input/output table for this as well. Finally, write a PARALLEL_ADDER method that takes 2 3-digit binary numbers, ABC and DEF. and returns an ordered 4-tuple in the form (W, X,Y,Z), where the sum of ABC and DEF= WXYZ. A sample run is shown here: Half-adder \begin{tabular}{ll|ll} i=0 & j=0 & c=0 & s=0 \\ i=0 & j=1 & c=0 & s=1 \\ i=1 & j=0 & c=0 & s=1 \\ i=1 & j=1 & c=1 & s=0 \end{tabular} Full-adder \begin{tabular}{lll|ll} i=0 & j=0 & k=0 & c=0 & s=0 \\ i=0 & j=0 & k=1 & c=0 & s=1 \\ i=0 & j=1 & k=0 & c=0 & s=1 \\ i=0 & j=1 & k=1 & c=1 & s=0 \\ i=1 & j=0 & k=0 & k=0 & s=1 \\ i=1 & j=0 & k=1 & c=1 & s=0 \\ i=1 & j=1 & k=0 & c=1 & s=0 \\ i=1 & j=1 & k=1 & c=1 & s=1 \end{tabular} threeBitBinary for i in threeBitBinare