Python

ImportRex = Re.search (' r\d+a ', ' 123chenronghua ')print (X.group ())s = re.search (' r[a-z]+a ', ' 123chenronghua ')print (S.group ())z = re.search (' r[a-z]+a$ ', ' 123chenronghuazhaobaoyua '). Group ()print (z)C = re.search (' r[a-z]+a ', '

Given two binary trees, write a function to verify that they are the same. If the two trees are structurally identical and the nodes have the same values, they are considered to be the same. Example 1: Input: 1 1 / /\

Python date Time object converted to string 1, standard conversion format symbol Description %a Local week short name such as: Sun, Mon, ..., Sat (en_US); So, Mo, ..., Sa (De_de) %A Local week full name such as: Sunday, Monday, ..., Saturday

Given a binary tree, check to see if it is mirror-symmetric. For example, the binary tree [1,2,2,3,4,4,3] is symmetric. 1 /\ 2 2 /\/\ 3 4 4 3 But the following [1,2,2,null,3,null,3] is not mirror-symmetric: 1 /\ 2 2 \

1 Download Link Https://docs.pytest.org/en/latest/getting-started.html Or use PIP to install The order is as follows:Pip Install Pytest Update command: Pip install-u pytest View version pytest-version 2 pytest using 2.1 Basic Test Create

Beginner Python has a period of time, winter vacation and read some knowledge of Web programming, wrote a BBS to achieve automatic login and post the Python script Because of my school BBS home use JS load, seemingly through the first page login is

Os.listdir (path) is a list of the names of the files that are obtained under the path path.     Open (path) is the opening of a file.         ITER is the Python iterator. So read all the files under a folder as follows: Import os path = "D:/python34

#-*-Coding:utf-8-*-# __author__ = ' Sengo ' Import Queue import threading Import Time Class Bookthread (threading. Thread): Def __init__ (self, thread_id, Q, func): Threading. Thread.__init__ (self) self.threadid = thread_id SELF.Q = q

This article is called the crawler through the local remote access to the URL, and then read the URL into the source code form, and then the source code analysis, to obtain their own required data, the equivalent of simple data mining. This article

SIX is an open source Python library designed to address Python2 and 3 incompatibility issues. As we all know, Python 3 is incompatible with Python 2, its syntax, class libraries are inconsistent, which brings great inconvenience to Python

The relevant use of strings 1, the definition of a string (single and double quotes are OK) name = ' Hello World ' /single quotation mark name = "Hello World" //double quote 2, the operation of the string (1) Concatenation of strings (2)

First, let's take a look at two __builtin__ functions NUM1 = Int.from_bytes (b ', byteorder = ' big ') num2 = int.from_bytes (b ', byteorder = ' little ') print (' (%s, '% ' Num1 ', Num1, '), ', ' (%s, '% ' num2 ', num2, ') ')Result: (NUM1, 12594),

Python calls the interface, because some interface calls timed out, causing the entire suite to fail, adding timeout to ensure that the integration case does not fail because of a case failure Time_limit (interval): # Increase timeout judgment,

The basis is not mentioned, the actual problems encountered in the need to resolve to be meaningful. 1, match the whole word (word boundary): \bcat \b 2, matching number: \b\d+\b \b\d+?\b after improvement: \b\d++\b 3, Matching html: (?>.*?) (?>.*?)

Os.path module is mainly used for file property acquisition, often used in programming, the following are several common methods of this module. More ways to view official documents: http://docs.python.org/library/os.path.html 1.os.path.abspath

Download the source tar package first You can download wget with the Linux download tool, as follows: 1 # wget Http://www.python.org/ftp/python/2.7.3/Python-2.7.3.tgz I also provided the download address: After downloading

After ubuntu14.04 quickly configures the available Caffe environment (CPU), continue to install the Python interface. The system defaults to its own python2.7.6. CD ~/caffe-master/python sudo apt-get install Python-dev python-numpy python-scipy

#-*-coding:utf-8-*-import pythoncom import pyhook import time Def onmouseevent (event): "Handling Mouse events" Fobj.writelines ('-' * + ' mouseevent Begin ' + '-' + ' \ n ') fobj.writelines ("Current time:%s\n"% TIME.STRFT IME ("%a,%d%b%Y%h:%m:%s",

Definition of a 1.python tuple object elements = ' Heilongjiang ', ' Jilin ', ' Liaoning ' #直接使用逗号分隔一些值, you can create a tuple elements = (' Heilongjiang ', ' Jilin ', ' Liaoning ') #使用小括号 elements = 3, #创建包含一个元素的元组, the element must

Height=input ("Please input your height,eg.:1.75") Weight=input ("Please input your weight") H=int (height) W=int (weight) BMI =w/h**2 If BMI Elif bmiPrint ("normal")Elif BMI Print ("Over weight")Elif BMI Print ("obese")Else Print ("Too fat")