Python practice exercise: Phone numbers and e-mail address extraction Programs

Topic:

Suppose you have a boring task to find all the phone numbers and email addresses in a long page or article. If you turn pages manually, you may need to look for a long time. If you have a program that can find the phone number and e-mail address in the text of the Clipboard, just press Ctrl-a to select all the text, press Ctrl-c to copy it to the Clipboard, and then run your program. It will replace the text in the Clipboard with the phone number and e-mail address found.

Test text

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Post-run results

Copied to clipboard:800-420-7240415-863-9900415-863-9950 [email protected][email protected][email protected][email protected]Hit any key to close this window...

Ideas

When you start taking over a new project, it's easy to start writing code directly. But more often, it's better to take a step back and consider the bigger picture. I suggest drawing up a high-level plan and figuring out what the procedure needs to do. Don't think about real code for the time being, think about it later.
1. Create a regular expression for your phone and a regular expression to create an e-mail
2. Match the Clipboard text
3. Copy the processed text to the Clipboard

Start writing the program now.

#! python3# phoneAndEmail.py - Finds phone numbers and email addresses on the clipboard.import re, pyperclip# 创建电话的正则表达式phoneRegex = re.compile(r'''(   (\d{3}|\(d{3}\))?  # 区号可选，444或(444)   (\s|-|\.)?  # 分隔符：字符或-或. 可选   (\d{3})  # 三个数字   (\s|-|\.)?  # 分隔符：字符或-或. 可选   (\d{4})  # 四个数字   )''',re.VERBOSE)# 创建email的正则表达式emailRegex = re.compile(r'''(   [a-zA-Z0-9._%+-]+  # username   @   [a-zA-Z0-9.-]+  # domail name   (\.[a-zA-Z]{2,4})  # dot-something   )''',re.VERBOSE)# 匹配剪切板的文本text = str(pyperclip.paste())matches = []for groups in phoneRegex.findall(text):   phoneNum = '-'.join([groups[1], groups[3], groups[6]])   matches.append(phoneNum)for groups in emailRegex.findall(text):   matches.append(groups[0])# 把处理好的文本复制到剪切板if len(matches) > 0:   pyperclip.copy('\n'.join(matches))   print('Copied to clipboard:')   print('\n'.join(matches))else:   print('No phone numbers or email addresses found.')

Analyze code

Re. Verbose is a parameter that allows a regular expression to ignore comments and whitespace characters. Verbose means that you can add some notes and make them more readable.
Regular expressions See: Python Regular

Another pit is groups, I didn't understand the difference between groups and group.
Group () is the meaning of intercept grouping, example:

import rea = "123abc456"print re.search("([0-9]*)([a-z]*)([0-9]*)",a).group(0)   #123abc456,返回整体print re.search("([0-9]*)([a-z]*)([0-9]*)",a).group(1)   #123print re.search("([0-9]*)([a-z]*)([0-9]*)",a).group(2)   #abcprint re.search("([0-9]*)([a-z]*)([0-9]*)",a).group(3)   #456

Groups () returns a tuple containing all the group strings, from 1 to the included group number.
The code in Phonenum = '-'. Join ([groups[1], groups[3], groups[6]]) groups is a variable, don't look wrong.

Python practice exercise: Phone numbers and e-mail address extraction Programs