Built-in function one of Python basics

Built-in functions are much more, just record the next part today.

ABS ()

Seek absolute value

>>> ABS ( -10.1)

All () is true, parameters are iterative

>>> All ([12,3,4,5, None]) False

Any () is true, it is true

>>> any ([12,3,4,5, None]) True

BOOL () Boolean value

>>> bool (1) True>>> bool (0) False

ASCII () automatic execution of __repr__ objects

Chestnuts:

class Foo:     def __repr__ (self):         return " 444 "  = ASCII (Foo ())print(n)print(Bin (5))print (Oct (9))print(hex) Result:4440b1010o110xf

Bin () Turn binary

Oct () goto octal

Hex () Turn hex

Data type:

0b means binary

0o means octal

0x indicates hexadecimal

Bytes () Converts a string to a byte type

Bytes () generally followed by encoding= ' character encoding, for example: bytes (' Li Jie ', encoding= ' utf-8 ')

Chestnuts:

>>> bytes (' kanji ', encoding='UTF8') b'  \xe6\xb1\x89\xe5\xad\x97'>>> bytes (' kanji ', encoding='gbk') b'\xba\xba\xd7\xd6' 

Encoding UTF-8: A kanji account of three bytes

Encoding GBK: A kanji account of two bytes

Bytecode deserialization, using the str command:

Chestnuts:

Name=bytes (' li Jie ', encoding='UTF-8')print (name) new_name=str (bytes (name), encoding='UTF-8')Print (new_name)

Results:

b'\xe6\x9d\x8e\xe6\x9d\xb0' li Jie

Built-in function one of Python basics