How to read two lines from file at a time and split into two variables?

Question

Here is my code:

file = open("codecipherinput.txt", "r")

while True:
    line1 = file.readline()
    line2 = file.readline()
    #print(line1 + line2)
    if not line2: break  # EOF
    currentline = line1 + line2

for i in range(3):
    print(currentline)
    s, text = currentline.strip().split(" ")

def encrypt(text, s):
    result = ""

    for i in range(len(text)):
        char = text[i]

        if char.isupper():
            result += chr((ord(char) + s - 65) % 26 + 65)

        else:
            result += chr((ord(char) + s - 97) % 26 + 97)

    return result


#text = input("Enter Word: ")
#s = int(input("Shift: "))
print("Cipher: " + encrypt(text, s))

These are the contents of my file:

7 
rmpc is the best! 
3 
i’m loving it 
23 
there’s nothing more fun than comp-sci programming 

I am trying to have the program take two lines at a time from the file and split those lines into two variables but am unsure how. Can someone help?

Answer 1

Use zip , and it happens automatically:

for line1, line2 in zip(file, file):
    ...

zip pulls from the first iterable, then from the second (except they're the same here, so it's just two lines), and then we unpack the resulting tuple to named variables. zip stops when either iterable is exhausted, matching the if not line2: break code implicitly.