Python

We install PIP. We also need to download it on Python's official website.: Https://pypi.python.org/pypi/pipAfter the download is complete, unzip to a folder, use the CMD console to enter the Extract directory, enter:Python setup.py InstallOnce

When it comes to wildcard characters, everyone will think very quickly about * and?Number, with wildcard characters, makes the expressive ability greatly enhanced, very many Linux commands support this thing, in fact is glob style pattern.Even the

OS Module (Supplemental) 1. View current path and switch path>>> Import OS>>> OS.GETCWD () #获取当前文件所在的路径' D:\\python\\lib\\idlelib '>>> Os.chdir ('.. /') #切换当上一层目录, this can be a relative path>>> OS.GETCWD ()' D:\\python\\lib '>>> os.chdir ('

Python calls OpenCV: OpenCV compiles the shared library file, and Python loads and uses the shared library file as a module. The popular point is that when compiling OPENCV, the Python interface option is turned on, and the Cv2.so (under Linux) or

I. Internet ProtocolConnecting two computers to the Internet is actually a set of uniform standards, which are called Internet protocols, and the essence of the Internet is a series of network protocols. Second, why should have Internet

ObjectiveA cock silk man a summon up the courage to the goddess B call vindicate, Goddess B is a scheming to think that the cock silk man A is a good person, do not want to directly refuse to set the call transfer to the Girlfriends C, the final

Introduction Python has a few built-in constants, only 6, True, False, None, notimplemented, ellipsis, __debug__. one. True 1. True is a constant of type bool used to represent truth. >>> truetrue>>> type (True)class'bool' > 2. Any

1 #! Python32 ImportOpenpyxl,os,glob3Os.chdir ('c:\\users\\administrator\\python35-32')4List=glob.glob ('*.txt')5 Print(list)6WB =OPENPYXL. Workbook ()7Sheet =Wb.get_active_sheet ()8columnnum=09 forFlienameinchlist:TenFile_object = open (str

1, the function parameter (reference) function's argument, passes the referencedef func (args): Args.appand (123) Li=[11,22,33]func (LI) print (LI) [11,22,33,123]2.lambda expressionF4 (name of function) =LAMBDA parameter: Reture value3. Built-in

Sync lock/Recursive lock/co-1 Sync lockLocks are often used to synchronize access to shared resources, create a lock object for each shared resource, call the Acquire () method to get the lock object when you need to access the resource (if another

Python advanced-objects, names, and bindings Write in front If not specifically stated, the following are based onPython3 1. All objects PythonPhilosophy: All objects in Python 1.1 Data models-objects, values, and types An object

1. In the dataframe of pandas, we often need to select a row for a specified condition based on a property, when the Isin method is particularly effective. Import Pandas as Pddf = PD. DataFrame ([[1,2,3],[1,3,4],[2,4,3]],index = [' One ', ' both '

Today, a little bit of a problem, you need to write a program to the list of irregular English names in the "first letter uppercase the rest of the lowercase" way to convert The first idea was to write a function to process each string "str" and

Python3 Regular Expressions (1) and python3 Regular Expressions Https://docs.python.org/3.4/howto/regex.html The blogger made some comments and modifications to this question ^_^ Annotation: the Python Regular Expression Engine is written in C, so

Python _ introduction to four basic types of data structures Data Structure: In layman's terms, it is a container that stores a large amount of data. Here we mainly introduce four basic data structures of Python:List, Dictionary, tuples, and

Decorative device notes, decorative notes # The decorator is designed to implement new functions without modifying the original function code and calling methods by nested functions.# The function name is actually the memory address of the function

Solve the Problem of legend display when python uses matplotlib for plotting, pythonmatplotlib Preface Matplotlib is an open-source project based on the Python language. It aims to provide a data drawing package for Python. When using the Python

Python and PyCharm installation and usage (for Mac), pythonpycharm Last week, I chatted with a friend about how to learn Python. She also had this plan. By the way, I recommended a book "programming tips: 1st Python Beginners". after I pushed it to

Notes for using class variables and member variables in python: python Variables Preface Recently I was writing a project in python and found a disgusting bug, that is, the data between two instances generated by the same class could affect each

Pycharm tutorial (7) Virtual Machine VM configuration tutorial, pycharmvm Imagine a situation where you operate your project on one platform, but you want to improve and run it on another platform, this is why Pycharm has done a lot of work to