txt文件中整数的总和

Question

I have two txt files that contain only numbers (number per line), so I want to add line 1 + line 1 so in succession to the last line of each file. Each file has the same line number.

I'm trying this way, however I can only print the first line

arq = open ("List1.txt")
arq2 = open ("List2.txt")

x = [linha.strip() for linha in arq]
arq.close()
y = [linha.strip() for linha in arq2]
arq2.close()

for linha in x:
    index = 0
    while index<len(x):
       result = (int(x[index]) + int(y[index]))
       index += 1
    print result

Answer 1

You can achieve this easily using zip .

Change the relevant lines of code to:

for x, y in zip(arq, arq2):
    result = int(x) + int(y)
    print(result)

Answer 2

While you should probably use zip like mentioned above, if you want to keep on using your way of doing things your problem is here

when you for loop in python, it's a foreach, so when you do

for linha in x:
    print linha

linha will be the value of x[n] where n is the iteration of the loop

anyways, to fix your code you'd do

# no need for the for loop, pull everything back
index = 0
while index< min(len(x), len(y)): # make sure you check for both lengths in case they are not the same
    result = (int(x[index]) + int(y[index]))
    index += 1
    print result # you want to print the result inside the loop so you don't lose it on the next iteration

the proper way to do it though would be

for n,p in zip(x,y):
    print int(n) + int(p)

Answer 3

First I would get a numpy array and concatenate

import numpy as np
file1 = np.genfromtxt('file1')
file2 = np.genfromtxt('file2')
file3 = np.concatenate((file1, file2), axis=1)

then save however you see fit