# Code Introspection

> Source: https://learn-python.com/code-introspection/
> Part of Learn Python, free to read.

Code introspection is the ability to examine classes, functions and keywords to know what they are, what they do and what they know.

Python provides several functions and utilities for code introspection.

```python
help()
dir()
hasattr()
id()
type()
repr()
callable()
issubclass()
isinstance()
__doc__
__name__
```

Often the most important one is the help function, since you can use it to find what other functions do.