Hands-On Blockchain for Python Developers

Other data types

Vyper has other data types that have not been used in the donation smart contract, as shown in the following list:

• bool: This data type is like a normal Boolean. It holds true or false values, as shown in the following code:

bull_or_bear: bool = True

• decimal: This data type is like float or double in Python, as shown in the following code:

half_of_my_heart: decimal = 0.5

• bytes32: This data type is like bytes32, with a peculiarity. If the length of the value is less than 32 bytes, it will be padded with zero bytes. So, if you set the messi value (5 characters/bytes) to the bytes32 data type variable (as shown in the following code), it will become messi\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00 ...