I need help with my python code. my output is saying None seconds for the prime and successive. from stopwatch import stopwatch

def backward$($A$,$B$)$:

if A $<$ B:

T $=$ A

else:

T $=$ B

while True:

if B $\%$ T $!=0$:

T $=$ T $-1$

elif A $\%$ T $!=0$:

T $=$ T $-1$

else:

return T

def prime$($A$,$ B$)$:

def numbers$($N$)$:

p $=2$

nums $=[]$

while N $>=$ p$*$p:

if $($N $\%$ p$)==0$:

nums.append$($p$)$

N $=$ N $//$ p

else:

p $=$ p $+1$

nums.append$($int$($N$))$

return nums

Anum $=$ numbers$($A$)$

Bnum $=$ numbers$($B$)$

gcd $=1$

if len$($Anum$)<$ len$($Bnum$)$:

for Adom in Anums:

gcd $=$ gcd $*$ Adom

Bnum.remove$($Adom$)$

else:

for Bdom in Bnumbers:

gcd $=$ gcd $*$ Bdom

Anum.remove$($Bdom$)$

return gcd

def successive$($A$,$B$)$:

if A $==0$:

return B

if B $==0$:

return A

while $($A $!=0)$ and $($B $!=0)$:

if A $>$ B:

A $=$ A $-$ B

else: B $=$ B $-$ A

def main$()$:

A$=$int$($input$("$Please enter the first integer: $"))$

B$=$int$($input$("$Please enter the second integer: $"))$

seconds $=$ stopwatch$()$

print$("$The Backwards For Loop: $\{\}$ seconds".format$($backward$($A$,$B$),$seconds.lap$()))$

print$("$The Prime Factorization: $\{\}$ seconds".format$($prime$($A$,$B$),$seconds.lap$()))$

print$("$The Successive: $\{\}$ seconds".format$($successive$($A$,$B$),$seconds.lap$()))$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$