如何将文件转换为字典？

Question

我有一个包含两列的文件,即

1 a 
2 b 
3 c

我希望将此文件读入字典,以便第1列是键,第2列是值,即

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

文件很小,因此效率不是问题.

Answer 1

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

Answer 2

这会将密钥保留为字符串:

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

Answer 3

如果你的python版本是2.7+,你也可以使用dict理解,如:

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

Answer 4

def get_pair(line):
    key, sep, value = line.strip().partition(" ")
    return int(key), value

with open("file.txt") as fd:    
    d = dict(get_pair(line) for line in fd)