For a detailed introduction to isalpha

When I was writing a search component today, I wanted to select the search field based on whether the search was for all letters. So there is the following code: if q.isalpha(): query = query.filter(User.username.ilike(like_str))else: query = query.filter(User.realname.ilike(like_str)) But I found that even if there is Chinese is also judged as isalpha is true. The test found that the method isalpha in str is unreliable in judging Unicode. The default decoding of parameters in Flask is UTF-8. So you need to use encode('utf-8') to re-encode it and then the function isal

1. isalpha in Python 2.7 does not support unicode

#Introduction: When writing a search component today, I want to select the search field based on whether the search is for all letters. So there is the following code: if q.isalpha(): query = query.filter(User.username.ilike(like_str))else: query = query.filter(User.realname.ilike(like_str))

2. Method in python to check whether a string consists of letters: string.isalpha()

Introduction: python string.isalpha() method The python string isalpha() method checks whether there is a string consisting of only alphabetic characters.

3. Understanding string processing based on Python learning

Introduction: Python string processing String input: my_string = raw_input ("please input a word:") String judgment: (1) Determine whether it is a pure letter my_string.isalpha() string search matching: (1) rere regular expression example 1: ^[\w_]*$First\ w means to match any word character including underscores, equivalent to '[A-Za-z0-9_]'. Then I followed _. Look at the * sign again: match the previous subexpression

4. Usage of the isalpha() method for string processing in Python

Introduction: This article mainly introduces the use of isalpha() method for processing strings in Python. It is the basic knowledge for introductory learning of Python. Friends in need can refer to it

[Related Q&A recommendations]:

python - Why does calling isalpha() or isalnum() return True for unicode Chinese strings?

The above is the detailed content of For a detailed introduction to isalpha. For more information, please follow other related articles on the PHP Chinese website!