# README
Linking Python to Go
TODO
Demo
The _demo directory contains our demos (it start with _ to prevent the go command from compiling it):
- hellopy: link Python to Go and say
Hello world - clpy: compile Python code and eval.
- callpy: call Python standard library function
math.sqrt.
How to run demos
To run the demos in directory _demo, you need to set the LLGO_LIB_PYTHON environment variable first. Assuming you use Python 3.12, and the libpython3.12.so (or libpython3.12.dylib or python3.12.lib) file is in the /foo/bar directory, then you need to set LLGO_LIB_PYTHON to:
export LLGO_LIB_PYTHON=/foo/bar/python3.12
For example, /opt/homebrew/Frameworks/Python.framework/Versions/3.12/lib/libpython3.12.dylib is a typical python lib location under macOS. So we should set it like this:
export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/lib/python3.12
Then you can run the demos in directory _demo:
cd <demo-directory> # eg. cd _demo/hellopy
llgo run .
# Packages
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# Functions
Return the module object corresponding to a module name.
Create a new value based on a format string similar to those accepted by the PyArg_Parse* family of functions and a sequence of values.
go:linkname CompileString C.Py_CompileString.
go:linkname CompileStringExFlags C.Py_CompileStringExFlags.
go:linkname CompileStringFlags C.Py_CompileStringFlags.
Parse and compile the Python source code in str, returning the resulting code object.
Clear the error indicator.
go:linkname ErrPrint C.PyErr_Print.
This is a simplified interface to EvalCodeEx, with just the code object, and global and local variables.
Evaluate a precompiled code object, given a particular environment for its evaluation.
go:linkname Finalize C.Py_Finalize.
go:linkname Float C.PyFloat_FromDouble.
go:linkname FloatFromSring C.PyFloat_FromString.
go:linkname FromCStr C.PyUnicode_FromString.
go:linkname FromCStrAndLen C.PyUnicode_FromStringAndSize.
FromGoString returns a new Unicode object from a Go string.
This is a higher-level interface that calls the current “import hook function” (with an explicit level of 0, meaning absolute import).
This is a wrapper around py.Import which takes a const char* as an argument instead of an Object.
go:linkname Initialize C.Py_Initialize.
This function works like Initialize() if initsigs is 1.
go:linkname List llgo.pyList.
go:linkname Long C.PyLong_FromLong.
go:linkname LongFromCStr C.PyLong_FromString.
go:linkname LongFromFloat64 C.PyLong_FromDouble.
go:linkname LongFromUnicode C.PyLong_FromUnicodeObject.
go:linkname LongFromVoidPtr C.PyLong_FromVoidPtr.
go:linkname LongLong C.PyLong_FromLongLong.
Return a new empty dictionary, or nil on failure.
Return a new function object associated with the code object code.
As NewFunc, but also allows setting the function object’s __qualname__ attribute.
Return a new list of length len on success, or nil on failure.
Return a new tuple object of size len, or nil on failure.
go:linkname RunSimpleFile C.PyRun_SimpleFile.
go:linkname RunSimpleFileFlags C.PyRun_SimpleFileFlags.
go:linkname RunSimpleString C.PyRun_SimpleString.
go:linkname RunSimpleStringFlags C.PyRun_SimpleStringFlags.
go:linkname SetProgramName C.Py_SetProgramName.
go:linkname Str llgo.pystr.
go:linkname Uintptr C.PyLong_FromSize_t.
go:linkname Ulong C.PyLong_FromUnsignedLong.
go:linkname UlongLong C.PyLong_FromUnsignedLongLong.
# Constants
read code from string.
read code from filename.
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read code from i/o.
# Type aliases
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