Conversion between different bases in Python

Different bases

Binary 0b101

If a number starting with the number 0 and the letter b represents a binary number, a SyntaxError exception will be thrown if a number greater than or equal to 2 appears

Octal 0711

If a number starting with the number 0 represents an octal number A SyntaxError exception will be thrown when a number greater than or equal to 8 appears

Decimal 123

Letters cannot appear in normal display

Hex 0x15

Hexadecimal numbers beginning with the number 0 and subtitle x can appear 0-9 If any other value appears with abcdef or ABCDEF, a SyntaxError exception will be thrown.

Built-in function after python 2.6

#Convert decimal to binary

>>> bin(10)
'0b1010'

#Convert binary to decimal

>>> int("1001",2)
9

# Convert decimal to hexadecimal

>>> hex(10)
'0xa'

#16 to decimal

>>> int('ff', 16)
255

>>> int('0xab', 16)
171

#Convert decimal to octal

>>print("%o" % 10)
>>12

#16 to binary

>>> bin(0xa)
'0b1010'
>>>

# Decimal to octal

>>> oct(8)
'010'

#2 to hexadecimal

>>> hex(0b1001)
'0x9'

In addition, in the interactive interpreter environment, python will automatically convert different bases into decimals for calculations.

>>> 0b101 + 0711 + 123 + 0x15 
606