Binary representation:
>>> 0b10
2
>>> 0b11
3
>>>
Octal representation:
>>> 0o11（零哦）
9
>>> 0o10
8
>>>
Hexadecimal representation:
>>> 0x1f
31
>>>
Adding nothing in python means decimal.
Convert other hexadecimal numbers to binary, using the bin method
>>> bin(10)
'0b1010'
>>> bin(0o7)
'0b111'
>>> bin(0xE)
'0b1110'
>>>
Convert other bases to decimal, using int method
>>> int(0b11)
3
>>> int(0o77)
63
Convert other hexadecimal numbers to octal, using oct method
>>> oct(0b111)
'0o7'
>>> oct(0x777)
'0o3567'
Convert hex to hexadecimal, using hex method
>>> hex(888)
'0x378'
>>> hex(0o7777)
'0xfff'
>>> hex(15)
'0xf'
