Chapter 18. Language Tools
In addition to the developer tools covered in an earlier chapter, Python also includes modules that provide access to its internal features. This chapter covers some tools for working in Python, regardless of the application area.
The warnings module is used to report nonfatal conditions or recoverable errors. A common example of a warning is the DeprecationWarning generated when a feature of the standard library has been superseded by a new class, interface, or module. Use warnings to report conditions that may need user attention, but are not fatal.
Defining a set of classes that conform to a common API can be a challenge when the API is defined by someone else or uses a lot of methods. A common way to work around ...
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