12.2 Finding errors: debugging

Errors in software code are sometimes referred to as bugs. Debugging is the process of finding and fixing bugs in code. This process can be performed at varying degrees of sophistication. The most efficient way is to use a tool called a debugger. Having unit tests in place is a good way to identify errors early; see Section 15.2.2: Using the unittest package. When it is not obvious where or what the problem is, a debugger is very useful.