A detailed introduction to the operation of embedding tuples in C/C ++ in Python

When Python is embedded into the implementation of tuples in C/C ++, you need related functions. Create a new tuple. The following is a detailed description of the relevant content. I hope you will find what you want from this article, this gives you a better understanding of how to embed Python into the tuples in C/C ++.

Python embedding tuples in C/C ++The Python/c api provides the PyTuple_New () function to create a new Python tuples. The PyTuple_New () function returns the created tuples. The function prototype is as follows.

PyObject * PyTuple_New (Py_ssize_t len)

The parameter meanings are as follows.

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· Len: the length of the created tuples. After the tuples are created, you can use the PyTuple_SetItem () function to add items to the tuples. The function prototype is as follows.

Int PyTuple_SetItem (PyObject * p, Py_ssize_t pos, PyObject * o)

The parameter meanings are as follows.

· P: The operation tuples.

· Pos: The Position Index of the added item.

· O: the added item value.

You can use the PyTuple_GetItem () function in Python/c api to obtain the value of an item in the tuples. The value of the return item of the PyTuple_GetItem () function. The function prototype is as follows.

PyObject * PyTuple_GetItem (PyObject * p, Py_ssize_t pos)

The parameter meanings are as follows.

· P: The tuples to be operated.

· Pos: The Position Index of the item.

After the tuples are created, you can use the _ PyTuple_Resize () function to re-adjust the size of the tuples. The function prototype is as follows.

Int _ PyTuple_Resize (PyObject ** p, Py_ssize_t newsize)

The parameter meanings are as follows.

· P: pointer to the tuples to be operated.

· Newsize: the size of the new element group.

The above article introduces how to embed tuples in C/C ++ in Python.