Python Basics for full stack development (1)

First, the basic knowledge

2. There are two ways to run Python:
   • The first is run through interactive operation, through "start", "All Programs", "python3.x", "IDLE".
   • The second is that we write the Python file double-click Run.
4. Help system for Python ()
   • We enter help () in interactive mode, enter the function name you want to query.
   • If you want to exit from the help mode into interactive mode, simply type in assist () after help>.

5. Variable

   The suffix name of the
   • ' print ("Hello World")
   • python program needs to end with a. py. The
   • #!/usr/bin/env python file allows you to search for and start the interpreter. (both Windows and LINUXF can use an absolute path to start the interpreter)
   • --Coding:utf8--the sentence in Python3 is no longer necessary. (The storage location must be the first two lines of the program)

       * Ascill 00000000 & 00000001 Unicode 0000000000000000+ & 0000000000000001 in 0010000000          00000111110010 Utf-8 can be used to show how much is expressed in & 00000001 001000000000000111110010 Python3 no need to pay attention to Python2 each file appears in Chinese, the head must be  

   • input ()
     • input ("Please enter user name:")
     • input ("Enter password:") waits for user input until the user enters. The
   • variable name can only be made up of:
     • letter
     • number
     • underscore
     • special case: variable names cannot start with a number. You cannot use Python's keywords as variable names. Do not repeat with Python's built-in functions.
7. Conditional statements
   • For indentation, generally use 4 spaces, try not to use the TAB key.

   • II. Basic data types

9. String
   • data, text, enclosed in quotation marks.
   • Strings can be joined in addition to stitching
   • The string can be repeated many times using multiplication.
11. Digital
    • The number has no quotation marks.
    • Numbers can do subtraction.
    • 35% 6 # get

    • Third, function
      Four, object-oriented

Python Basics for full stack development (1)