"Stupid methodology Python3" 19 functions and variables

Script:
results:

note:

1. Exercise of function definitions and calls, script variables and functions may be different variable names, function can be passed directly to digital, you can pass variables, mathematical expressions, and even mix variables and mathematical expressions.
2. Global variables do not change the variable function.
3. Try not to make global variables and functions the same as the variable name, or likely to cause confusion.