Explain what it means to have a cyclic dependency between objects or modules in a program.

Cyclic dependency between objects or modules means that two or more components depend on each other directly or indirectly, forming a closed loop. For example, module A imports module B, and module B in turn imports module A.

This leads to problems with module loading, complicates testing and maintenance of the code, and can also cause runtime errors. In Python, cyclic dependencies can result in some names not being available during import if modules are loaded in the wrong order.

To avoid cyclic dependencies, it is recommended to reorganize the code, extract common parts into separate modules, or use lazy imports inside functions.