.. _constants:

Constants
=========

The web3.constants module contains commonly used values.

Strings
*******

.. code-block:: python

    #The Address Zero, which is 20 bytes (40 nibbles) of zero.
    web3.constants.ADDRESS_ZERO

    #The hexadecimal version of Max uint256.
    web3.constants.MAX_INT

    #The Hash Zero, which is 32 bytes (64 nibbles) of zero.
    web3.constants.HASH_ZERO

Int
***

.. code-block:: python

    #The amount of Wei in one Ether
    web3.constants.WEI_PER_ETHER