我有以下字符串:
"crypto map OUTSIDEMAP 540 match address 3P-DC-CRYPTO"
而且,我试图仅与正则表达式匹配3P-DC-CRYPTO
到目前为止,我已设法编写以下正则表达式:
crypto_acl = re.findall("address [-\w+]*",output)
但是,它匹配address 3P-DC-CRYPTO
有什么建议吗?
答案 0 :(得分:2)
您可以为positive lookbehind使用regex (?<=address\s)[-\w+]*
。
答案 1 :(得分:2)
实际上不需要正则表达式:
string = "crypto map OUTSIDEMAP 540 match address 3P-DC-CRYPTO"
# check for address as well
words = string.split()
if words[-2] == 'address':
last_word = words[-1]
print(last_word)
这将检查address
,然后捕获最后一个单词。
答案 2 :(得分:1)
您可以通过捕获所需的单词来完成此操作:
>>> crypto_acl = re.findall("address ([-\w+]*)",output)
>>> crypto_acl
['3P-DC-CRYPTO']
此外,由于您在问题中提到需要字符串的最后一个单词,因此您可以这样做,而无需在address
之后明确查找单词:
>>> crypto_acl = re.findall(r"\b([-\w+]+)$",output)
>>> crypto_acl
['3P-DC-CRYPTO']
#or simply
>>> crypto_acl = output.split()[-1]
>>> crypto_acl
'3P-DC-CRYPTO'
现场演示here
答案 3 :(得分:0)
尝试使用正则表达式搜索,
import re
str = "crypto map OUTSIDEMAP 540 match address 3P-DC-CRYPTO"
result = re.search(r'(address .*)', str)
result.group() # return as 'address 3P-DC-CRYPTO'
result = re.search(r'address (.*)', str)
result.group() # return as 'address 3P-DC-CRYPTO'
result.group(0) # return as 'address 3P-DC-CRYPTO'
result.group(1) # return as '3P-DC-CRYPTO'
答案 4 :(得分:0)
您可以使用Positive Lookbehind并捕获组():
import re
pattern=r"(?<=address )[\w-]+"
string_1="crypto map OUTSIDEMAP 540 match address 3P-DC-CRYPTO"
match=re.finditer(pattern,string_1,re.M)
for i in match:
print(i.group())