Python Basics "day03": Getting Started knowledge supplements

First, Scope

For the scope of the variable, execute the declaration and exist in memory, the variable can be used in the following code.

123	if1==1:    name = ‘wupeiqi‘printname

The following conclusions, right?

outer variables, which can be used by inner variables, cannot be used by outer variables

two or three-dollar operation

1	result =值1 if 条件 else值2

If the condition is true: result = value 1
If the condition is false: result = value 2

Third, the binary

• Binary, 01
• Octal, 01234567
• Decimal, 0123456789
• Hex, 0123456789ABCDEF

Python Basics

For Python, everything is an object, objects are created based on the class

Therefore, the following values are objects: "Wupeiqi", 38, [' Beijing ', ' Shanghai ', ' Shenzhen '), and are objects generated from different classes.

Python Basics "day03": Getting Started knowledge supplements