example:
int(“1001”,2)
9
int(“0b1001”,2)
9
int(“15”,8)
13
int(“1a”,16)
26
bin():
十进制转二进制
example:
bin(9)
‘0b1001’
oct():
十进制转8进制
example:
oct(15)
‘0o17’
hex():
十进制转16进制