|  | .. highlightlang:: c | 
|  |  | 
|  |  | 
|  | .. _concrete: | 
|  |  | 
|  | ********************** | 
|  | 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 :c:func:`PyDict_Check`.  The chapter is structured like the | 
|  | "family tree" of Python object types. | 
|  |  | 
|  | .. warning:: | 
|  |  | 
|  | While the functions described in this chapter carefully check the type of the | 
|  | objects which are passed in, many of them do not check for *NULL* being passed | 
|  | instead of a valid object.  Allowing *NULL* to be passed in can cause memory | 
|  | access violations and immediate termination of the interpreter. | 
|  |  | 
|  |  | 
|  | .. _fundamental: | 
|  |  | 
|  | Fundamental Objects | 
|  | =================== | 
|  |  | 
|  | This section describes Python type objects and the singleton object ``None``. | 
|  |  | 
|  | .. toctree:: | 
|  |  | 
|  | type.rst | 
|  | none.rst | 
|  |  | 
|  |  | 
|  | .. _numericobjects: | 
|  |  | 
|  | Numeric Objects | 
|  | =============== | 
|  |  | 
|  | .. index:: object: numeric | 
|  |  | 
|  | .. toctree:: | 
|  |  | 
|  | long.rst | 
|  | bool.rst | 
|  | float.rst | 
|  | complex.rst | 
|  |  | 
|  |  | 
|  | .. _sequenceobjects: | 
|  |  | 
|  | Sequence Objects | 
|  | ================ | 
|  |  | 
|  | .. index:: object: sequence | 
|  |  | 
|  | Generic operations on sequence objects were discussed in the previous chapter; | 
|  | this section deals with the specific kinds of sequence objects that are | 
|  | intrinsic to the Python language. | 
|  |  | 
|  | .. XXX sort out unicode, str, bytes and bytearray | 
|  |  | 
|  | .. toctree:: | 
|  |  | 
|  | bytes.rst | 
|  | bytearray.rst | 
|  | unicode.rst | 
|  | tuple.rst | 
|  | list.rst | 
|  |  | 
|  |  | 
|  | .. _mapobjects: | 
|  |  | 
|  | Container Objects | 
|  | ================= | 
|  |  | 
|  | .. index:: object: mapping | 
|  |  | 
|  | .. toctree:: | 
|  |  | 
|  | dict.rst | 
|  | set.rst | 
|  |  | 
|  |  | 
|  | .. _otherobjects: | 
|  |  | 
|  | Function Objects | 
|  | ================ | 
|  |  | 
|  | .. toctree:: | 
|  |  | 
|  | function.rst | 
|  | method.rst | 
|  | cell.rst | 
|  | code.rst | 
|  |  | 
|  |  | 
|  | Other Objects | 
|  | ============= | 
|  |  | 
|  | .. toctree:: | 
|  |  | 
|  | file.rst | 
|  | module.rst | 
|  | iterator.rst | 
|  | descriptor.rst | 
|  | slice.rst | 
|  | memoryview.rst | 
|  | weakref.rst | 
|  | capsule.rst | 
|  | gen.rst | 
|  | coro.rst | 
|  | datetime.rst | 
|  |  |