author | Shane McErlean <shane.mcerlean@accenture.com> |
Fri, 27 Aug 2010 15:33:49 +0100 | |
changeset 101 | 1e82a8be084a |
parent 1 | 2fb8b9db1c86 |
permissions | -rw-r--r-- |
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.. highlightlang:: c |
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.. _iterator-objects: |
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Iterator Objects |
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---------------- |
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Python provides two general-purpose iterator objects. The first, a sequence |
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iterator, works with an arbitrary sequence supporting the :meth:`__getitem__` |
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method. The second works with a callable object and a sentinel value, calling |
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the callable for each item in the sequence, and ending the iteration when the |
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sentinel value is returned. |
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.. cvar:: PyTypeObject PySeqIter_Type |
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Type object for iterator objects returned by :cfunc:`PySeqIter_New` and the |
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one-argument form of the :func:`iter` built-in function for built-in sequence |
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types. |
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.. versionadded:: 2.2 |
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.. cfunction:: int PySeqIter_Check(op) |
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Return true if the type of *op* is :cdata:`PySeqIter_Type`. |
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.. versionadded:: 2.2 |
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.. cfunction:: PyObject* PySeqIter_New(PyObject *seq) |
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Return an iterator that works with a general sequence object, *seq*. The |
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iteration ends when the sequence raises :exc:`IndexError` for the subscripting |
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operation. |
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.. versionadded:: 2.2 |
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.. cvar:: PyTypeObject PyCallIter_Type |
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Type object for iterator objects returned by :cfunc:`PyCallIter_New` and the |
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two-argument form of the :func:`iter` built-in function. |
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.. versionadded:: 2.2 |
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.. cfunction:: int PyCallIter_Check(op) |
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Return true if the type of *op* is :cdata:`PyCallIter_Type`. |
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.. versionadded:: 2.2 |
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.. cfunction:: PyObject* PyCallIter_New(PyObject *callable, PyObject *sentinel) |
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Return a new iterator. The first parameter, *callable*, can be any Python |
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callable object that can be called with no parameters; each call to it should |
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return the next item in the iteration. When *callable* returns a value equal to |
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*sentinel*, the iteration will be terminated. |
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.. versionadded:: 2.2 |