如何将文件转换成字典？

Question

我有一个包含两列的文件，即

1 a 
2 b 
3 c

我想把这个文件读到字典中，使第1列是键，第2列是值，即

d = {1:'a', 2:'b', 3:'c'}

文件很小，所以效率不是问题。

Answer 1

如果python版本是2.7+，则还可以使用类似于dict comprehension的：

with open('infile.txt') as f:
  {int(k): v for line in f for (k, v) in (line.strip().split(None, 1),)}

Answer 2

d = {}
with open("file.txt") as f:
    for line in f:
       (key, val) = line.split()
       d[int(key)] = val

Answer 3

这将使密钥保留为字符串：

with open('infile.txt') as f:
  d = dict(x.rstrip().split(None, 1) for x in f)