File write is only writing one line when I have encrypted multiple lines

Question

I am trying to encrypt 1 file and save the encrypted text from the first file into another file. I have it all working besides that it is only writing 1 line into the new file instead of the entire file.

file1 = open("passwords-plainText", "r")
for line in file1:
    file2 = open("encryptedfile.txt", "w")
    file2.write(encryptVignere(keyGen(), line))

The example file I am using looks like this

example
secondexample
new line
this is another new line

The output into the new file I am saving to only writes the first line and not the rest of the lines ie.)

tyawakud

The file should look like this instead...

tyawakud
tqiibwaeeonozp
pttzucfqs
foxnzgjwtmbhnpwhjnapmsfg

Answer 1

You should only open file2 once:

file1 = open("passwords-plainText", "r")
file2 = open("encryptedfile.txt", "w")

for line in file1:
    file2.write(encryptVignere(keyGen(), line))

Otherwise you just keep overwriting it.