如何使用Python或bash将两列数组中的数字替换为另一个文件中的相应字符串

1  3
2  3
2  1
34 2
...

1   CA1
2   CB1
3   CC1
34   DD1
...

CA1 CC1
CB1 CC1
CC1 CA1
DD1 CB1

# Here is another approach  
name = dict()
with open('file2', 'r') as f:
    lines = f.readlines()
for line in lines:
    col = line.split()
    name[col[0]] = col[1]
with open('file1', 'r') as f:
    lines = f.readlines()
for line in lines:
    col = line.split()
    print('{} {}'.format(name[col[0]], name[col[1]]))

>>> with open('file2') as f:
...     values = [i.strip() for i in f if i.strip() != '']
>>> d = dict([i.split() for i in values])
>>> with open('file1') as f:
...     keys = [i.strip() for i in f if i.strip() != '']
>>> with open('file3', 'w') as f:
...     for i, j in [i.split() for i in keys]:
...         f.write(d[i]+' '+d[j]+'n')

并检查file3。