如何从文件对象(data.txt)中提取此正则表达式中的组?
import numpy as np
import re
import os
ifile = open("data.txt",'r')
# Regex pattern
pattern = re.compile(r"""
^Time:(\d{2}:\d{2}:\d{2}) # Time: 12:34:56 at beginning of line
\r{2} # Two carriage return
\D+ # 1 or more non-digits
storeU=(\d+\.\d+)
\s
uIx=(\d+)
\s
storeI=(-?\d+.\d+)
\s
iIx=(\d+)
\s
avgCI=(-?\d+.\d+)
""", re.VERBOSE | re.MULTILINE)
time = [];
for line in ifile:
match = re.search(pattern, line)
if match:
time.append(match.group(1))
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代码的最后一部分的问题是我逐行迭代,这显然不适用于多行正则表达式.我试过这样用pattern.finditer(ifile)
:
for match in pattern.finditer(ifile):
print match
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...只是为了查看它是否有效,但是finditer方法需要一个字符串或缓冲区.
我也试过这种方法,但无法让它起作用
matches = [m.groups() for m …
Run Code Online (Sandbox Code Playgroud) 假设我有一个清单:
a = ['apple', 'carrot']
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和字典:
d ={'apple': [2,4], 'carrot': [44,33], 'orange': [345,667]}
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如何使用列表a作为在字典d中查找的键?我希望将结果写入以逗号分隔的文本文件中
apple, carrot
2, 44
4, 33
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更正了a = ['apple','orange']到a = ['apple','胡萝卜']的a-list