Book Image

Learning Cython Programming (Second Edition) - Second Edition

By : Philip Herron
Book Image

Learning Cython Programming (Second Edition) - Second Edition

By: Philip Herron

Overview of this book

Cython is a hybrid programming language used to write C extensions for Python language. Combining the practicality of Python and speed and ease of the C language it’s an exciting language worth learning if you want to build fast applications with ease. This new edition of Learning Cython Programming shows you how to get started, taking you through the fundamentals so you can begin to experience its unique powers. You’ll find out how to get set up, before exploring the relationship between Python and Cython. You’ll also look at debugging Cython, before moving on to C++ constructs, Caveat on C++ usage, Python threading and GIL in Cython. Finally, you’ll learn object initialization and compile time, and gain a deeper insight into Python 3, which will help you not only become a confident Cython developer, but a much more fluent Python developer too.
Table of Contents (14 chapters)
Learning Cython Programming Second Edition
Credits
About the Author
Acknowledgments
About the Reviewer
www.PacktPub.com
Preface
Index

Cythonizing struct cmd_entry


Next, let's consider creating a cythonfile.pxd file for the necessary cdef declarations of Tmux that we need to be aware of. We need to look at the struct cmd_entry declaration, and work backwards from this:

struct cmd_entry {
  const char  *name;
  const char  *alias;

  const char  *args_template;
  int     args_lower;
  int     args_upper;

  const char  *usage;
  int     flags;

  void     (*key_binding)(struct cmd *, int);
  int     (*check)(struct args *);
  enum cmd_retval   (*execc)(struct cmd *, struct cmd_q *);
};

As you can see, cmd_entry depends on several other types, so we need to work backwards a little bit. If you're going to be lazy and live dangerously, you can get away with it sometimes if you don't care about accessing the data correctly by casting any pointers such as void *. But if you're a seasoned C programmer, you know this is fairly dangerous and should be avoided. You can see this type depends on struct cmd *, struct cmd_q *, and struct...