In what situations can circular dependencies occur when importing modules or components?

Circular dependencies when importing modules or components occur when two or more modules mutually import each other directly or through a chain of imports. For example, module A imports module B, and module B, in turn, imports module A.

Such situations often arise due to:

• Poor separation of responsibilities between modules.
• Attempting to use functions or classes from another module that, in turn, depends on the first.
• Top-level imports where modules reference each other without deferred imports.

In Python, this can lead to ImportError errors or cause some objects to be unavailable at runtime because the import has not yet completed.

To avoid circular dependencies, you can:

• Move common functionality to a third module.
• Use local imports inside functions or methods to delay the import until the call.
• Review the architecture and divide modules into functional zones.