[英]find a pattern using regular expression
这是我的测试示例
JT - American journal of public health
JID - 1254074
SB - AIM
SB - IM
MH - Adult
MH - Biomedical Research/*organization & administration
MH - Female
MH - Health Care Reform/*history/*methods
AB - OBJECTIVES: We assessed whether a 2-phase labeling and choice
AB- architecture intervention
OWN - NLM
STAT- MEDLINE
DCOM- 20120417
LR - 20170220
IS - 1541-0048 (Electronic)
在所有行均以“ MH”开头之后,如何编写正则表达式以仅识别词汇表,然后将其导入到Excel工作表中。 输出应该是这样的:
[Adult, Biomedical Research, organization & administration, Female, Health Care Reform, history, methods].
这是我的尝试:
import re
Path = "MH\s*.*"
re.findall(Path,file)
我知道这是错误的,但我不知道如何解决。
谢谢
使用re.findall
演示:
import re
s = """JT - American journal of public health
JID - 1254074
SB - AIM
SB - IM
MH - Adult
MH - Biomedical Research/*organization & administration
MH - Female
MH - Health Care Reform/*history/*methods
AB - OBJECTIVES: We assessed whether a 2-phase labeling and choice
AB- architecture intervention
OWN - NLM
STAT- MEDLINE
DCOM- 20120417
LR - 20170220
IS - 1541-0048 (Electronic)"""
res = []
for i in re.findall(r"MH\s+-\s+(.*)", s, flags=re.MULTILINE):
res.extend(i.split("/*"))
print( res )
输出:
['Adult', 'Biomedical Research', 'organization & administration', 'Female', 'Health Care Reform', 'history', 'methods']
看起来您需要做一些正则表达式,因为您还想在/ *上拆分某些行。 这应该可以解决问题!
import re
my_file = """JT - American journal of public health
JID - 1254074
SB - AIM
SB - IM
MH - Adult
MH - Biomedical Research/*organization & administration
MH - Female
MH - Health Care Reform/*history/*methods
AB - OBJECTIVES: We assessed whether a 2-phase labeling and choice
AB- architecture intervention
OWN - NLM
STAT- MEDLINE
DCOM- 20120417
LR - 20170220
IS - 1541-0048 (Electronic)"""
my_list = my_file.splitlines()
new_list = []
for item in my_list:
if re.search("^MH\s*-", item):
item = re.sub("[^-]+-\s*", "", item)
item = item.split("/*")
new_list = new_list + item
print(new_list)
输出:
['Adult', 'Biomedical Research', 'organization & administration', 'Female', 'Health Care Reform', 'history', 'methods']
我正在使用该字符串并将其放入列表中。 我认为很有可能在导入该字符串时将其作为列表。 我还喜欢每次使用正则表达式一次处理1行,只是以后更容易进行故障排除。
我要匹配以MH
开头的项目,然后捕获它们。 然后,我在/*
上拆分每个项目,并将所有这些项目放到一个不错的列表中,可用于excel导出。
只是发布我尝试过的代码,然后才注意到在编写更好的答案之前已经发布了代码。
请不要判断。 那只是发生在SO。
s = """
JT - American journal of public health
JID - 1254074
MH - Adult
MH - Biomedical Research/*organization & administration
MH - Health Care Reform/*history/*methods
AB - OBJECTIVES: We assessed whether a 2-phase labeling and choice
"""
import re
import itertools
matches = re.findall(r"^MH[\s-]+(.*)$", s, re.MULTILINE)
splitmatches = [i.split(r"/*") for i in matches]
flattenedmatches = list(itertools.chain(*splitmatches))
print(flattenedmatches)
输出:
['Adult', 'Biomedical Research', 'organization & administration', 'Health Care Reform', 'history', 'methods']
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