Python: Number System Interconversion - int(), bin(), oct() & hex()

Number System Interconversion in Python

Number System Interconversion in Python

Python provides handy builtin functions bin(), hex() & oct() to convert decimal values to strings of corresponding number systems.

>>> a = 4
>>> bin(a)
'0b100'
>>> hex(a)
'0x4'
>>> oct(a)
'0o4'

To convert these strings back into decimal system, use the builtin int() function with appropriate base value.

>>> int('0b100', 2)
4
>>> int('0x4', 16)
4
>>> int('0o4', 8)
4

You can use the combination of these methods to convert one non-decimal system to another. For example, converting a binary value to its hexadecimal equivalent:

>>> hex(   int('0b100', 2)   )
'0x4'

See also:

• Python 101
• Object Oriented Python
• Design Patterns in Python
• 50+ Handy Standard Library Modules
• 60+ Handy Third Library Modules
• 50+ Tips & Tricks for Python Developers
• 50+ Know-How(s) Every Pythonista Must Know