7. Concrete Objects Layer
The functions in this chapter are specific to certain Python object
types. Passing them an object of the wrong type is not a good idea;
if you receive an object from a Python program and you are not sure
that it has the right type, you must perform a type check first;
for example. to check that an object is a dictionary, use
PyDict_Check(). The chapter is structured like the
``family tree'' of Python object types.
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