字符串库提供了 string.lower() 方法,可以将字符串转换为小写。我们可以使用这个方法将字符串转换为小写,然后用 replace() 方法替换字符串。 def case_insensitive_replace(string, old, new): """ Performs a case-insensitive replacement on a string. Args: string: The string to search in. old: The...
Write a Python script to perform a case-insensitive search and replace of a word in a given text. Write a Python program to replace all occurrences of a substring regardless of case and then print the modified string. Write a Python function to implement case-insensitive string replacement usin...
def search(pattern, string, flags=0):"""Scan through string looking for a match to the pattern, returning a match object, or None if no match was found."""return _compile(pattern, flags).search(string) 3. findall(pattern, string, flags=0) match和search均用于匹配单值,即:只能匹配字符串...
来看⼀个⼩例⼦,假设我们有⼀段⽂本以及⼀条能够识别⼤部分电⼦邮件地址的正则表达式: text = """Dave dave@ Steve steve@ Rob rob@ Ryan ryan@yahoo.com """ pattern = r'[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}' # re.IGNORECASE makes the regex case-insensitive regex...
match(pattern,string, flags=0) # pattern: 正则模型 #string: 要匹配的字符串 # falgs : 匹配模式 X VERBOSE Ignore whitespaceandcommentsfornicer looking RE's.I IGNORECASE Performcase-insensitive matching. M MULTILINE"^"matches the beginningoflines (after a newline)aswellasthestring."$"matches th...
re.search:如果字符串中有任何位置,则返回一个匹配对象,包括多行字符串。 re.findall:返回包含所有匹配项的列表 re.split:获取一个字符串,在匹配点处拆分它,返回一个列表 re.sub:替换字符串中的一个或多个匹配项 匹配 # syntac re.match(substring, string, re.I) ...
fullmatch Match a regular expression pattern to all of a string. search Search a string for the presence of a pattern. sub Substitute occurrences of a pattern found in a string. subn Same as sub, but also return the number of substitutions made. ...
Python3将'CaseInsensitiveDict'转换为JSON的过程如下: 首先,需要导入相应的库: 代码语言:txt 复制 import json from requests.structures import CaseInsensitiveDict 然后,创建一个CaseInsensitiveDict对象: 代码语言:txt 复制 headers = CaseInsensitiveDict() headers["Content-Type"] = "application/json" headers["...
In this unit, you use the most common string methods in Python to manipulate strings, from simple transformations to more advanced search-and-replace operations.
print(x.string) Try it Yourself » Example Print the part of the string where there was a match. The regular expression looks for any words that starts with an upper case "S": importre txt ="The rain in Spain" x = re.search(r"\bS\w+", txt) ...