Python oct() Function

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Python oct() function takes an integer and returns the octal representation in a string format.

Python oct() Function Syntax

Syntax : oct(x)

Parameters :

x – Must be an integer number and can be in either binary, decimal or hexadecimal format.

Returns : octal representation of the value.

Errors and Exceptions :

TypeError : Raises TypeError when anything other than integer type constants are passed as parameters.

Python oct() Function Example

Python3

print(oct(10))

Output:

0o12

Example 1: Base conversion from decimal and binary using oct() function

Using oct() to convert numbers from different bases to octal.

Python3

# Binary to Octal 
print(oct(0b110)) 
  
# Hexa to octal 
print(oct(0XB))

Output :

0o6
0o13

Example 2: Python oct() for custom objects

Implementing __int__() magic method to support octal conversion in Math class.

Python3

class Math: 
    num = 76
    def __index__(self): 
        return self.num 
    def __int__(self): 
        return self.num 
obj = Math() 
print(oct(obj))

Output:

0o114

Example 3 : Demonstrate TypeError in oct() method

Python3

# Python3 program demonstrating TypeError 
  
print("The Octal representation of 29.5 is " + oct(29.5)) 
  
''' 
# Python doesn't have anything like float.oct() 
# to directly convert a floating type constant 
# to its octal representation. Conversion of a 
# floating-point value to it's octal is done manually. 
'''

Output :

Traceback (most recent call last):
  File "/home/5bf02b72de26687389763e9133669972.py", line 3, in 
    print("The Octal representation of 29.5 is "+oct(29.5))
TypeError: 'float' object cannot be interpreted as an integer

Applications: Python oct() is used in all types of standard conversion. For example, Conversion from decimal to octal, binary to octal, hexadecimal to octal forms respectively.