string ='39801 356, 2102 1111'# Three digit number followed by space followed by two digit numberpattern ='(\d{3}) (\d{2})'# match variable contains a Match object.match = re.search(pattern, string)ifmatch:print(match.group())else:print("pattern not found")# Output: 801 35 Here,...
import re def extract_number(string): pattern = r'\D+(\d+)' match = re.search(pattern, string) if match: return match.group(1) else: return None # 示例用法 string = "abc123def456" number = extract_number(string) print(number) # 输出:123 在上述代码中,使用了re模块的search函数来搜...
The module defines several functions and constants to work with RegEx.re.findall()The re.findall() method returns a list of strings containing all matches.Example 1: re.findall()# Program to extract numbers from a string import re string = 'hello 12 hi 89. Howdy 34' pattern = '\d+...
substrings = extract_substring(string) print(substrings) 输出结果为: 代码语言:txt 复制 ['Hello', 'regex', 'This', 'is', 'a', 'sample', 'string'] 在这个示例中,正则表达式模式\b\w+\b用于匹配一个或多个单词字符。re.findall(pattern, string)函数会返回一个包含所有匹配子串的列表。...
group(1) print(phone_number) 1.2 常见文本处理任务举例 1.2.1 数据清洗与预处理 数据清洗是数据分析的第一道工序,包括去除噪声数据、填补缺失值、转换格式等。例如,清理包含空格、特殊字符的字符串数据: text = " Hello, World ! @#$%^&*( ) " clean_text = text.strip().replace(r'[^\w\s]', ...
在一行中,我们使用get_payload()方法提取消息正文内容,并使用quopri.decodestring()函数解码 QP 编码的数据。然后,我们检查数据是否有字符集,如果我们确定了字符集,则在指定字符集的同时使用decode()方法对内容进行解码。如果编码是未知的,我们将尝试使用 UTF8 对对象进行解码,这是在将decode()方法留空时的默认值,...
('lang'='JAVA') package com.mypackage; import java.util.regex.Matcher; import java.util.regex.Pattern; public class Foo { final static Pattern compile = Pattern.compile(".*?([0-9]+).*"); public static String extractNumber(String input) { final Matcher m = compile.matcher(input); if...
[issue_number, draw_time] + red_numbers + [blue_numbers[0]] +[top1,top2,top3]) # 导出为 CSV 文件 with open(f'{file_path}lottery_results_2003_2024.csv', 'w', newline='', encoding='utf-8') as csvfile: csv_writer = csv.writer(csvfile) # 写入标题行 #csv_writer.writerow(...
Declare the string variable: s='Helloabc' Copy Replace a word with an empty string: print(s.replace('Hello','')) Copy The output is: Output abc Copy The output shows that the stringHellowas removed from the input string. Remove Characters a Specific Number of Times Using thereplace()Met...
match the minimum number of times - known as a lazy quantifier re+? tree freeeee trout roasted Capturing, alternation & backreferences In order to extract specific parts of a string, you can capture those parts, and even name the parts that you captured. Syntax Description Example ...