python[Little Turtle 005Python data type]

I. Numeric type

• Plastic
• Boolean type True and False is 1 and 0
• Floating point Type
• E notation E, for example 1.5e11 = 150000000000, 1e2 is the square of 1*10.

PS: Boolean types in Python can be added directly for example:

>>>true + True >>>2

Two. Type conversion

• Strings for numbers can be converted to integers using str ()

>>>a = ' 520 ' >>>b = Int (a) >>>b >>>520

• For shaping can also be converted into string type

>>>a = 520 >>>b = str (a) >>>a >>> ' 520′

• String type special floating point type

>>>a = ' 520′>>>b = float (a) >>>b 520.0

Three. Application of built-in functions

• The type function is used to determine what types of data the user gives

For example

>>>type (3.5) >>><class ' float ' >

>>>type (true) >>><class ' bool ' >

>>>type (5E15) >>><class ' float ' >

• Isinstance () built-in function for judging the data type and returning to the user a Boolean type of True or False

For a code case

>>>a = ' haha ' >>>isinstance (A,STR) True

>>> isinstance (320,int) True

>>>isinstance (A,int) >>>false

can also be directly used to judge

python[Little Turtle 005Python data type]