如何将一列添加到另一个文件

paste在这里非常方便，但如果值的数量不相等，它会惩罚你：

$ paste -d' ' myFile{1,2}
1 10 10
2 20 11
3 30 12
4 40 13
5 50 14
6 60 15
 16

如果你想任意限制第二个文件中使用的行到第一个文件，你可以，它只是会慢一点并使用更多的 RAM（这对这么小的数据集并不重要）。

$ paste -d' ' myFile1 <(head -n$(cat myFile1 | wc -l) myFile2)
1 10 10
2 20 11
3 30 12
4 40 13
5 50 14
6 60 15

无法抗拒添加详细选项（python 脚本）

#!/usr/bin/env python3

with open("file1") as l:
    l = [item.replace("\n", "") for item in l]

with open("file2") as l2:
    l2 = [item.replace("\n", "") for item in l2]

for item in [l[i]+" "+l2[i] for i in range(0, len(l))]:
    print(item)

>>> 
1 10 10
2 20 11
3 30 12
4 40 13
5 50 14
6 60 15
>>> 

要立即将更改写入 file1，代码为：

#!/usr/bin/env python3

with open("file1", "r") as l:
    l = [item.replace("\n", "") for item in l]

with open("file2", "r") as l2:
    l2 = [item.replace("\n", "") for item in l2]

with open("file1", "wt") as edit:
    for item in [l[i]+" "+l2[i] for i in range(0, len(l))]:
        edit.write(item+"\n")

如果 file2 的行数也可能少于file1，下面的代码负责正确添加列，并可能添加更多列：

#!/usr/bin/env python3

with open("file1", "r") as l1:
    l1 = [item.replace("\n", "") for item in l1]

with open("file2", "r") as l2:
    l2 = [item.replace("\n", "") for item in l2]

for i in range(0, len(l1)):
    try:
        print(l1[i]+" "+l2[i])
    except IndexError:
        print(l1[i]+"  ")