How can I execute arbitrary Python statements from C?

Python Questions and Answers

(Continued from previous question...)

How can I execute arbitrary Python statements from C?

The highest-level function to do this is PyRun_SimpleString() which takes a single string argument to be executed in the context of the module __main__ and returns 0 for success and -1 when an exception occurred (including SyntaxError). If you want more control, use PyRun_String(); see the source for PyRun_SimpleString() in Python/pythonrun.c.

(Continued on next question...)

Other Interview Questions

• What is Python?
• Why can't I use an assignment in an expression?
• Is there a tool to help find bugs or perform static analysis?
• How do you set a global variable in a function?
• What are the rules for local and global variables in Python?
• How do I share global variables across modules?
• How can I pass optional or keyword parameters from one function to another?
• How do I write a function with output parameters (call by reference)?
• How do you make a higher order function in Python?
• How do I copy an object in Python?
• How can I find the methods or attributes of an object?
• How can my code discover the name of an object?
• Is there an equivalent of C's "?:" ternary operator?
• How do I convert a string to a number?
• How do I convert a number to a string?
• How do I modify a string in place?
• How do I use strings to call functions/methods?
• Is there an equivalent to Perl's chomp() for removing trailing newlines from strings?
• Is there a scanf() or sscanf() equivalent?
• Is there a scanf() or sscanf() equivalent?
• How do I convert between tuples and lists?
• What is a negative index?
• How do I iterate over a sequence in reverse order?
• How do you remove duplicates from a list?
• How do you make an array in Python?
• How do I create a multidimensional list?
• How do I apply a method to a sequence of objects?
• Can you do a Schwartzian Transform in Python?
• How can I sort one list by values from another list?
• What is a class?
• What is a method?
• What is self?
• How do I check if an object is an instance of a given class or of a subclass of it?
• What is delegation?
• How do I call a method defined in a base class from a derived class that overrides it?
• How can I organize my code to make it easier to change the base class?
• How do I create static class data and static class methods?
• How can I overload constructors (or methods) in Python?
• How do I find the current module name?
• __import__('x.y.z') returns < module 'x'>; how do I get z?
• When I edit an imported module and reimport it, the changes don't show up. Why does this happen?
• Where is the math.py (socket.py, regex.py, etc.) source file?
• How do I make a Python script executable on Unix?
• Why don't my signal handlers work?
• How do I test a Python program or component?
• None of my threads seem to run: why?
• How do I parcel out work among a bunch of worker threads?
• How do I delete a file? (And other file questions...)
• How do I copy a file?
• How do I read (or write) binary data?
• How do I run a subprocess with pipes connected to both input and output?
• How can I mimic CGI form submission (METHOD=POST)?
• How do I send mail from a Python script?
• How do I avoid blocking in the connect() method of a socket?
• Are there any interfaces to database packages in Python?
• How do I generate random numbers in Python?
• Can I create my own functions in C?
• Can I create my own functions in C++?
• How can I execute arbitrary Python statements from C?
• How can I evaluate an arbitrary Python expression from C?
• How do I extract C values from a Python object?
• How do I call an object's method from C?
• How do I catch the output from PyErr_Print() (or anything that prints to stdout/stderr)?
• How do I access a module written in Python from C?
• How do I interface to C++ objects from Python?
• How do I tell "incomplete input" from "invalid input"?
• How do I run a Python program under Windows?
• How do I make python scripts executable?
• How do I debug an extension?
• Where is Freeze for Windows?
• Is a *.pyd file the same as a DLL?
• How can I embed Python into a Windows application?
• How do I use Python for CGI?
• How do I emulate os.kill() in Windows?
• Why does os.path.isdir() fail on NT shared directories?
• Web Python
• The classical "Hello World" in python CGI fashion:
• How to Debugging in python?
• How to make Forms in python?
• How to use Shell Commands for Web python
• How to use Cookies for Web python
• How to use Sessions for Web python