Python printing a stringon two lines if string beginns with 'l'

so I have some code such as:

print(csv[0])
Genes = csv[0]
OutPut.write(Genes)
OutPut.write(',')
OutPut.write(csv[1])
OutPut.write(',')
try:     
    OutPut.write(csv[2])
except IndexError:
    print("No Lethality")
OutPut.write('\n')

Basically csv has 3 objects and they should print out as this:

atp,10101010,lethal

But for some reason, if csv[0] so the first value, begining with an 'l' it is printed as:

l

sfsf,1010101010,Lethal

I have tried using a for loop etc but I always get the same issue and all the other lines which start without an 'l' work perfectly.

Thanks