could modify this code to encrypt entire files of text

plainText $=$ input$("$Enter a one$-$word, lowercase message $")$

distance $=$ int$($input$("$Enter the distance value $"))$

code $=""$

for ch in plainText: ordvalue $=$ ord$($ch$)$ cipherValue $=$ ordvalue $+$ distance

if cipherValue $>$ ord$(\text{'}$z$\text{'})$:

cipherValue $=$ ord$(\text{'}$a$\text{'})+$ distance $-\backslash ($ord$(\text{'}$z$\text{'})-$ ordvalue $+1)$ code $+=$ chr$($cipher$)$ print$($code$)$