Python basic data type Integer and Boolean

• Integer and Boolean type
  • Gets the data type of the object
    • 1. Type ()
    • 2. Dir ()
    • 3. Help ()
    • 4, in the pycharm inside the operation
  • numeric type int
    • Create:
    • Int ()
      • Receive a numeric string
    • . Bit_lenght ()
    • Length of type int
  • Boolean type bool

Gets the data type of the object 1, type ()

to view the data type of an object
Example: (String)

1."abc"
2.print(type(s))

Results:

1.<class‘str‘>

2. Dir ()

View all the methods that the object's corresponding class has

1."hi"
2.bdir(temp)
3.print(b)

3. Help ()

View Help

1."hi"
2.help(type(temp))     #同样可以查看对应类和类的所有方法

4, in the pycharm inside the operation

Press CTRL and then directly click on the corresponding method –> can be directly located to the method

The number type int is created:

n = 123
Or
n = Int (123)

Attention:

1. The results of the above 2 creation methods are the same, but in Python they are essentially different.
2. The parameters that are passed into the integer type must be all numbers. Otherwise it will be an error!
3. The transformation of an int () that essentially runs
4. int conversion method inside the * __init__() * * method

Int ()

can receive 2 parameters

• The first argument is a binary code or a numeric string
• The second parameter is what type of input you want the result to be displayed in, and the runtime will display it according to the input system.

Receive a numeric string

1."123"
2.print(int(n))

Results:

1.123

Pass in the second argument

1.int("100", base = 2)
2.print(n)
3.int("100", base = 4)
4.print(n)

Results:

1.4
2.6

Note:
1. When you pass in a numeric string, you cannot pass the second argument
2. When the second parameter is passed in, the first argument must be in the format of a binary; 报错！
3, the second parameter can not write; default is decimal

. Bit_lenght ()

Gets the minimum number of digits that can be represented by the binary

1.4     #4二进制：00000100
2.ret = n1.bit_length()
3.print(ret)

Results:3

Length of type int

The length will vary depending on the range of the computer, and if the setting is out of range;

• 32-bit system: -231-231-1
• 64-bit system: -263-263-1

Attention:
There is no length limit after python3.0, as long as your memory is installed under. It can be infinitely large

.

Boolean type bool

true or False
1 or 0

Python basic data type Integer and Boolean