How Do I Convert Hex Strings to Integers in Python?

Converting Hex Strings to Integers in Python

Converting a hexadecimal string to an integer is a common task in Python. Hexadecimal strings are often used to represent numbers in low-level programming and in data formats such as JSON and XML.

To convert a hex string to an integer without an 0x prefix, it is necessary to specify the base explicitly as 16. This is because Python cannot distinguish between hex and decimal numbers without the 0x prefix.

x = int("deadbeef", 16)  # Convert hex string without 0x prefix

However, when the hex string has an 0x prefix, Python can determine that it is a hex number and automatically convert it to an integer. Using the 0x prefix is convenient and is recommended for readability.

print(int("0xdeadbeef", 0))  # Convert hex string with 0x prefix
print(int("10", 0))  # Convert decimal string

It is important to note that when using the 0x prefix, the base parameter must be explicitly set to 0, otherwise Python will revert to its default assumption of base-10.

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