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Python 3 reference · Built-in Functions

Python oct() Function

Convert an integer to an octal string prefixed with 0o, such as oct(8) giving '0o10'. Often used for file permissions.

Python 3 Since 3.0

Syntax

oct(x)

Parameters

ParameterDescription
x An integer.

Return value

A string such as '0o755'.

Examples

To octal and backTry it yourself
print(oct(8), oct(493), oct(-56))
print(int("755", 8))

Output

0o10 0o755 -0o70
493
Unix permissionsTry it yourself
mode = 0o644  # rw-r--r--
print(oct(mode), f"{mode:o}")

Output

0o644 644

Version history

VersionChange
Python 3.0Added
  • bin() · Convert an integer to a binary string prefixed with 0b, such as bin(5) giving '0b101'. Negative numbers get a minus sign.
  • hex() · Convert an integer to a lowercase hexadecimal string prefixed with 0x, such as hex(255) giving '0xff'.
  • int() · Convert a number or string to an integer. Floats are truncated toward zero, and strings can be in any base from 2 to 36.
  • Python Numbers · tutorial