How can code duplication in the namespace of constants be prevented?

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Code duplication in the namespace of constants can be prevented by defining constants in a separate module or file and then importing them into the required modules. This will ensure that the constants are defined only once and can be accessed by multiple modules without duplication.

Another way to prevent code duplication in the namespace of constants is to use an enumeration data type. Enumerations provide a way to define a set of named values, which can be used as constants throughout the program. This helps to avoid duplication and also makes the code more readable and maintainable.

Finally, maintaining a centralized list of constants in a configuration file can also prevent code duplication. This file can be imported into the required modules, and the constants can be used without having to redefine them in each module.