将字符串作为有序字典导入 [英] Importing string as an ordered dictionary
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问题描述
我有一个没有扩展名的文件,带有这样的行(忽略行之间的间距,但每一行都是单独的行):
I have a file with no extension with lines like this (ignore the spacing between the lines, but each line is a separate row):
OrderedDict([('key1', u'value1'), ('key2', 'value2')])
OrderedDict([('key1', u'value1'), ('key2', 'value2')])
OrderedDict([('key1', u'value1'), ('key2', 'value2')])
当我将其导入Python
when I import it to Python
snap_fh = open("C:\Users\.......")
for row in snap_fh:
print(type(row))
行是字符串"
,我无法将其解析为 OrderedDictionary
rows are "strings"
and I cannot parse it as an OrderedDictionary
"OrderedDict([('key1', u'value1'), ('key2', 'value2'))])\n"
如何将其作为 OrderedDict
ast.literal_eval(row)
无效!
推荐答案
您应使用正则表达式进行更安全的评估:
You should use a regular expression for safer evaluation:
import re
import ast
from collections import OrderedDict
def read(f):
for s in f:
m = re.match(r'^OrderedDict\((.+)\)$', s)
if m:
yield OrderedDict(ast.literal_eval(m.group(1)))
...
for d in read(snap_fh):
print type(d)
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