find()函数会返回子串在字符串中的起始位置,如果找不到则返回-1。 4. 完整代码示例 下面是完整的代码示例: deffind_case_insensitive(string,substring):string_lower=string.lower()substring_lower=substring.lower()index=string_lower.find(substring_lower)returnindex# 调用示例string="Hello World"substring="WO...
test_string_all = "123 abc 456 def 789"all_matches = re.findall(r'\d+', test_string_all)print(f"All matches: {all_matches}")输出：All matches: ['123', '456', '789']4. 替换字符串：`re.sub()``re.sub()` 函数允许用另一个字符串替换匹配到的子串。这在文本清洗或格式化时特别有...
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 [10]: string_data = pd.Series(['aardvark', 'artichoke', np.nan, 'avocado']) In [11]: string_data Out[11]: 0 aardvark 1 artichoke 2 NaN 3 avocado dtype: object In [12]: string_data.isnull() Out[12]: 0 False 1 False 2 True 3 False dtype: bool 1. 2. 3. 4. 5. 6...
Python Exercises, Practice and Solution: Write a Python program to do case-insensitive string replacement.
1. match(pattern, string, flags=0) 从字符串的开头进行匹配, 匹配成功就返回一个匹配对象,匹配失败就返回None flags的几种值 X 忽略空格和注释 I 忽略大小写的区别 case-insensitive matching S . 匹配任意字符,包括新行 def match(pattern, string, flags=0):"""Try to apply the pattern at the start...
string =''' the stirng Has many line In THE fIle'''list_of_string=string.split()printlist_of_string#将字符串分离开,放入列表中print'*'*50defcase_insensitive_sort(liststring): listtemp= [(x.lower(),x)forxinliststring]#将字符串列表,生成元组,(忽略大小写的字符串,字符串)listtemp.sort() ...
case_insensitive = re.findall(r"search", text, re.IGNORECASE) print(case_insensitive) 12. Using Named Groups To assign names to groups and reference them by name: match = re.search(r"(?P<first>\w+) (?P<second>\w+)", text) if match: print(match.group('first')) print(match.gro...
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.
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) # substring is a string or a pattern, string is the text we look for a pattern , re.I is case ignore...