Commonly used built-in functions in python

Basic small function, string function, sequence function Sequence, tuple, list small function max() for maximum (list, tuple, sequence) min() for minimum len() for length >>> a = [1,2,3,4] >>> max(a) 4 >>> min(a) 1 >>> len(a) 4 >>> Operation small function divmod() returns a tuple. The first paramet ...

Posted by mnuzum on Sun, 26 Apr 2020 19:54:55 -0700

What are Python's sacred honey operations?Attached Code

Someone said,'Python can do everything from nurturing sisters to dressing up x, except it can't have children!Anything will do!" Download video?I use Python; Play a jump?I jumped to 4999 with Python; Sister?Still using Python; Grab red bags for train tickets?Yes, it's Python. Even if I'm sorting out files, I'll use Python... Here are so ...

Posted by Lonepig on Sun, 26 Apr 2020 09:40:30 -0700

Spark DataFrame is not a real DataFrame

The article was originally written in Mars team column , welcome to follow. From this article, we start a new series of reading paper. Today's paper is Towards Scalable Dataframe Systems , is still a preprint. By Devin Petersohn from Riselab , formerly known as APMLab, the lab has produced a series of famous open source projects, such as Apache ...

Posted by daniel_grant on Sun, 26 Apr 2020 00:52:37 -0700

Developing Restful api based on Django framework

In the last article, we explained the main concepts of restful api to let you have a preliminary understanding. In this article, we will learn to develop the interface of restful architecture through the Django framework of python. 1, Development environment Development language: Python 3.6IDE :PycharmFramework: Django 2.2.12Test tool: Postman ...

Posted by Sonic_Rage on Sat, 25 Apr 2020 23:25:04 -0700

smtplib module of sending mail by python

SMTP (Simple Mail Transfer Protocol) is a simple mail transfer protocol, which is a set of mail transfer rules used from the source address to the destination address. SMTP is simply encapsulated in python, which can send plain text mail, HTML mail and mail with attachments The syntax for python to create an SMTP object is as follows: imp ...

Posted by marukochan on Sat, 25 Apr 2020 17:02:24 -0700

How to use Python to grab QQ music data (the third play)

[I. project objectives] adopt How to use Python to grab QQ music data (the first play) We have realized to obtain the song name, album name and play link of the songs with the specified page number in the single ranking of the specified singer of QQ music. adopt How to use Python to grab QQ music data We have realized to obtain the lyrics of t ...

Posted by markthien on Sat, 25 Apr 2020 13:13:05 -0700

3. Supplement of strings, lists, tuples, dictionaries, collections

Relevant: Character string Common functions (refer to function libraries in more detail or note tips when using compilers) String Formatting Original string list Common Functions List Generation Dictionaries Common Functions aggregate Common Functions Additional: Many of python's compil ...

Posted by ifm1989 on Sat, 25 Apr 2020 09:21:04 -0700

Python reptile actual battle: hands-on teaching you to crawl agricultural product data (with code)

  Preface The text and pictures of the article are from the Internet, only for learning and communication, and do not have any commercial use. The copyright belongs to the original author. If you have any questions, please contact us in time for handling. Crawler's website: Wanbang international group. Founded in 2010 and headquartered in Zhen ...

Posted by icedude on Sat, 25 Apr 2020 08:53:46 -0700

Write decorator to implement python request error retry function

When doing interface automation test, we always encounter interface script failure due to connection timeout and other errors. Official method: max_retries=5 error retries 5 timesNote that this is only for DNS, connection error retry. from requests.adapters import HTTPAdapter s = requests.Session() s.mount('http://',HTTPAdapter( ...

Posted by irving on Sat, 25 Apr 2020 08:41:56 -0700

Django advanced view and url configuration

URL configuration tips: Method 1: 1 from django.conf.urls.defaults import * 2 from mysite.views import current_datetime, hours_ahead, hours_behind, now_in_chicago, now_in_london 3 4 urlpatterns = patterns('', 5 ('time/', current_datetime), 6 ('time/plus/(\d{1,2})/', hours_ahead), 7 ('time/minus/(\d{1,2})/', hours_ ...

Posted by qads on Sat, 25 Apr 2020 02:13:56 -0700