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class NotRequired(ImportError):
"""
Exception raised when a requirement is not met.
This exception inherits from `ImportError`. It's typically used when a particular
package, module or other dependency that is not essential for the overall function
of the program is not found or doesn't meet specific requirements.
#### Attributes
**message** (`str`)
: A string that provides a more detailed explanation of the error.
#### Example
This exception might be used in a scenario where an optional feature of a program
relies on a specific package that is not installed:
```{code-block} python
try:
import optional_package
except ImportError:
raise NotRequired("optional_package is not installed.")
```
"""
def __init__(self, message):
"""
Initialize a new instance of `NotRequired`.
#### Parameters
**message** (`str`)
: A string that provides a more detailed explanation of the error.
"""
self.message = message
super().__init__(self.message)
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