我想在正则表达式中使用一个变量,我如何在Python中做到这一点?
TEXTO = sys.argv[1]
if re.search(r"\b(?=\w)TEXTO\b(?!\w)", subject, re.IGNORECASE):
# Successful match
else:
# Match attempt failed
我想在正则表达式中使用一个变量,我如何在Python中做到这一点?
TEXTO = sys.argv[1]
if re.search(r"\b(?=\w)TEXTO\b(?!\w)", subject, re.IGNORECASE):
# Successful match
else:
# Match attempt failed
当前回答
if re.search(r"\b(?<=\w)%s\b(?!\w)" % TEXTO, subject, re.IGNORECASE):
这将把TEXTO中的内容作为字符串插入到正则表达式中。
其他回答
from re import search, IGNORECASE
def is_string_match(word1, word2):
# Case insensitively function that checks if two words are the same
# word1: string
# word2: string | list
# if the word1 is in a list of words
if isinstance(word2, list):
for word in word2:
if search(rf'\b{word1}\b', word, IGNORECASE):
return True
return False
# if the word1 is same as word2
if search(rf'\b{word1}\b', word2, IGNORECASE):
return True
return False
is_match_word = is_string_match("Hello", "hELLO")
True
is_match_word = is_string_match("Hello", ["Bye", "hELLO", "@vagavela"])
True
is_match_word = is_string_match("Hello", "Bye")
False
下面是你可以使用的另一种格式(在python 3.7上测试)
regex_str = r'\b(?< \ \w)%s\b(
我发现当你不能使用{}变量(这里替换为%s)时,它很有用。
你也可以使用format关键字。Format方法会将{}占位符替换为您传递给Format方法作为参数的变量。
if re.search(r"\b(?=\w)**{}**\b(?!\w)".**format(TEXTO)**, subject, re.IGNORECASE):
# Successful match**strong text**
else:
# Match attempt failed
rx = r'\b(?<=\w){0}\b(?!\w)'.format(TEXTO)
if re.search(r"\b(?<=\w)%s\b(?!\w)" % TEXTO, subject, re.IGNORECASE):
这将把TEXTO中的内容作为字符串插入到正则表达式中。