2019-10-16 python learning the first day

pycharm the template file .py Method: 
   Settings -> File and code templates -> File -> Python Script-> right input template content -> Applications -> OK 

Note: 
   # is the beginning of a single line comment (shortcut key CTRL + /) paired '' 'in the middle of a multi-line comment 

lines of code connector: \ 
     Print ( "Hello World") 
  is equal to Print ( "Hello \ 
            World") 

quotes: 
   single and double quotation marks, three quotes are string (note the single and multiple use of cross marks) 

escape character: \, r r or 
   the back of the special characters into a normal character 

input, output: 
   Print, iNPUT (input string type are) 

Python common data types: 
   numbers, strings, lists, tuples, dictionaries