Category：Regular Expression
-
Time：2019-11-22
Cell-phone number Copy codeThe code is as follows: /^1((3[\d])|(4[5,6,9])|(5[0-3,5-9])|(6[5-7])|(7[0-8])|(8[1-3,5-8])|(9[1,8,9]))\d{8}$/ Capital Copy codeThe code is as follows: /^[A-Z]+$/ Date, such as: January 1, 2000 Copy codeThe code is as follows: /^\d{4}(-)\d{1,2}\1\d{1,2}$/ E-mail address Copy codeThe code is as follows: /^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/ Domestic telephone, such as: 0341-86091234 Copy codeThe code is as follows: /\d{3}-\d{8}|\d{4}-\d{7}/ ID card number (15 […]
-
Time：2019-11-21
A regular expression is a special sequence of characters that can help you match or find other strings or sets of strings using the specialized syntax reserved in the pattern Regular expressions are widely used in the UNIX world. Next, python uses regular expressions to remove (filter) HTML tags and extract text. The specific code […]
-
Time：2019-11-20
This article mainly talks about how to use regular matching to match Chinese characters. The matching rules of Chinese regular expressions are not as easy to remember as other regular rules. Let’s take a look at this Chinese regular expression. \W matches only Chinese, numbers and letters. For Chinese people, matching only Chinese is often […]
-
Time：2019-11-19
regular expression In this section, let’s look at the related usage of regular expression. Regular expression is a powerful tool for string processing. It has its own specific syntax structure. With it, it’s easy to realize string retrieval, replacement and matching verification. Of course, for crawlers, with it, it is very convenient for us to […]
-
Time：2019-11-18
Python extracts numbers from strings Use regular expressions as follows: Sum up ##^ start of matching string. ##$matches the end of the string. ##\ B matches the boundary of a word. ##\ D matches any number. ##\ D matches any non numeric character. ##X? Matches an optional x character (in other words, it matches x […]
-
Time：2019-11-17
Python regular expression matches numbers Phone number: \ D {3}- \ D {8}| \ D {4}- \ D {7} QQ No.: [1-9] [0-9] {4,} China Postal Code: [1-9] \ D {5} (?)! (d)ID card: \ D {15}| \ D {18}IP address:+ [1-9] \ d * positive integer-[1-9] \ d * negative integer-? [1-9] \ d […]
-
Time：2019-11-16
In daily work, most IDE’s own search work can meet most needs. Plus regular matching, it’s just as powerful. Match a mailbox, phone number or something. Sometimes we may encounter a slightly special situation. Windows 1.03 and Windows 2.0 fisrt Released in 1985 and 1987 respectively. Windows 95 and Windows 98 are the successor. Then […]
-
Time：2019-11-15
The version of Python code downloaded from the network is uneven. During the migration of python3. X from python2. X, there is a problem of print syntax, that is, there is no bracket for print in python2. X, and there is bracket for print in python3. X. Adding parentheses line by line is inefficient, so […]
-
Time：2019-11-14
Write a regular expression that matches a variety of special characters ((?=[\x21-\x7e]+)[^A-Za-z0-9]) x21-\x7e]+)[^A-Za-z0-9]) This matches all non alphanumeric symbols visible on the keyboard var patrn = /[`[email protected]#$%^&*()_\-+=<>?:”{}|,.\/;’\\[\]·~！@#￥%……&*（）——\-+={}|《》？：“”【】、；‘’，。、]/im; If (! PATRN. Test (STR)) {// returns false if it contains special characters return false; } return true; This is the input box to prevent special characters from […]
-
Time：2019-11-13
Let’s introduce that JS regular expressions must contain numbers, letters and special characters JS regular expression requirements: 1. It must contain numbers, English letters, special symbols and be greater than or equal to 8 digits 2. Special symbols include: ~! @ × $%^&* The regular expression is as follows: /^(?=.*\d)(?=.*[a-zA-Z])(?=.*[[email protected]#$%^&*])[\[email protected]#$%^&*]{8,}$/ Interpretation: Here we mainly use […]
-
Time：2019-11-12
This article crawls the content, input the keywords to search, and automatically crawls the shop name, commodity name, price of relevant commodities on the JD website, crawling 100 pages (100 pages in total) The code is as follows; import requests import re Request request headers = { ‘User-Agent’: ‘Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, […]
-
Time：2019-11-11
In general, recursive regular expressions are used to match any nested hierarchy or left and right symmetric structures. For example, match: ((((())))) (hello (world) good (boy) bye) <p>hello world <strong>hello world</strong> </p> abc.def.ghij…stu.vwx.yz abcdcba 123454321 Recursive regularization is a flexible part of regular expressions, in other words, it may be difficult. The following regular expression […]
