lynda learning python

First week of Python learning-Account Logon exercise, first week of python Python learning started at the end of November 2017. Select python 3.6. Rough Implementation of account login. 1 import getpass 2 3 wall = True 4 usr = '

Learning python-first day of blog record, first day of python blog Hello world! Today, I opened my blog for the first time, specifically recording what I learned from programming languages. Today's learning content: Build vs code + python3.5 "ide" How to Learn about Liao Xuefeng

Python learning note 5:python Read and write filesFirst, the open mode of the file　　1. Open File1) f=open (' D:\\a.txt ', ' W ')The first parameter is the path to the file, and if only the name of the file is written, the default is the file under the current execution directory, and the second parameter is the open mode of the file.This way to open the file, aft

Python learning diary (second week), second week of python I have officially learned the Python language since this week. I will share with you an article on learning Python every week! PythonInstallation The first step of

Python learning Mind Map, python mind guide I accidentally encountered a Python learning Mind Map compiled by a great god. I feel very helpful for beginners to clarify their learning ideas. Thank you very much for your sharing.

'} Dict.update (DICT2)Add the key value pairs of the dictionary dict2 to the Dict1, that is, merge Dict1 and dict2 into a dictionary. dic1 = { 'name' : 'nanliangrexue','age':18}dic2 = { 'gender' : 'male'}dic1.update(dic2)print(dic1)#输出{'name': 'nanliangrexue', 'age': 18, 'gender': 'male'} Dict.values ()Return all values in a dictionary as a list dic = { 'name' : 'nanliangrexue','age':18}print(dic.values())#输出dict_values(['nanliangrexue', 18])5. The traversal of a dict

The import keyword is used in Python for module loading.Create the Pythonmoduleload project as a demonstration in Visual Studio first.1, the same directory loadingCreate a samefolder.py fileWrite code:1 def Printsamefolder (): 2 Print ("This method was in thesame folder")Modify startup file, default to pythonmoduleload.py1 Import Samefolder 2 Samefolder.printsamefolder ()Note that after writing to import, Samefolder has been only perceived by Visu

This section describes how Python functions return multiple values at the same time. When learning Python, I was surprised to find that Python functions can return multiple values at the same time, which is very interesting. #define function sumdef sum(x, y): z = x + y x = x ^ y y = x ^ y x = x ^ y return

DFS steps are as follows: [d]-->[d,b]-->[d,b,a]-->[d,b,a,c]--> (the parent class of C is a, which already appears in front, remove the previous a)-->[d,b,c,a]　　Polymorphic (polymorphism): Simple to understand, different classes have the same method name (methods name), that is, there is the same interface, we can call the same method name in any instance of a class.But in fact, although these methods have the same name and are conceptually similar, internal operations are different.For example,

Python Learning Record day4, python record day41. built-in function supplement Callable (object) Check whether the object is callable1. classes can be called.2. The instance cannot be called unless the _ call _ method is declared in the class. def f1(): print("test")f2 = "test"print(callable(f1))print(callable(f2)) True False Chr (I) Returns the ASCII charact

in thePythonDevelopment (http://www.maiziedu.com/course/python-px/) using the Keyword import to introduce a module, It is similar to the include header file in C + + . For example, to reference the module math, you can use import math to introduce itat the very beginning of the file . when you call a function in the math module, you must refer to this , see the code for details:>>>improt Math>>> Math . Sin (0)To import your own modules:#hello. Pyprin

Python learning variable operations and basic data types, python Data Types One variable:# Variable: A zone in the computer memory. variables can store values within the specified range, and variables can be changed.# In python, there is no obvious type for the variables that reference data in computer memory. The spec

1, prepare the following east, and in order to install: Python 3.6 (64-bit) Django-1.11.tar.gzpycharm-community-2016.3.2.exe installed after the cmd run: python --version python -m django --version Confirm that the installation is complete 2, set up a folder in the D disk: D:\python_workspace\helloworld, in Pycharm in this position to create a n

output as follows:Yiwangzhibujianhello YiwangzhibujianNote: input receives a string, even if the input is 1, if a number is required to be converted.2.3 Int ()/float ()These two methods also use more, that is, the conversion of strings to integer or floating-point method.Num=int ('ten')print(num+1)The addition of strings and numbers will result in an error, so conversion is required.2.4 isinstance ()This method is more used when defining a method, because P