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xushiwei
2024-05-12 23:59:24 +08:00
parent ce0f5f3797
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@@ -29,7 +29,24 @@ See [github.com/goplus/llgo/c](https://pkg.go.dev/github.com/goplus/llgo/c) for
## Python support ## Python support
TODO You can load a Python library in llgo! For example:
```go
package main
import (
"github.com/goplus/llgo/c"
"github.com/goplus/llgo/py"
"github.com/goplus/llgo/py/math"
)
func main() {
x := math.Sqrt(py.Float(2))
c.Printf(c.Str("sqrt(2) = %f\n"), x.Float64())
}
```
Here, We call `py.Float(2)` to create a Python floating point number 2, and pass it to Python’s `math.sqrt` to get `x`. Then use `x.Float64()` to convert the Python object to Go's `float64` type, and finally we print the value through C `printf`.
## Other frequently used libraries ## Other frequently used libraries
@@ -74,11 +91,10 @@ The `_demo` directory contains our demos (it start with `_` to prevent the `go`
* [genints](_demo/genints/genints.go): various forms of closure usage (including C function, recv.method and anonymous function) * [genints](_demo/genints/genints.go): various forms of closure usage (including C function, recv.method and anonymous function)
* [llama2-c](_demo/llama2-c): inference Llama 2 (It's the first llgo AI example) * [llama2-c](_demo/llama2-c): inference Llama 2 (It's the first llgo AI example)
And the `py/_demo` directory contains python related demos: And the `_pydemo` directory contains python related demos:
* [callpy](_pydemo/callpy/callpy.go): call Python standard library function `math.sqrt`
* [hellopy](py/_demo/hellopy/hello.go): link Python to Go and say `Hello world`
* [clpy](py/_demo/clpy/cleval.go): compile Python code and eval
* [callpy](py/_demo/callpy/call.go): call Python standard library function `math.sqrt`
### How to run demos ### How to run demos
@@ -89,7 +105,7 @@ cd <demo-directory> # eg. cd _demo/genints
llgo run . llgo run .
``` ```
To run the demos in directory `py/_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: To run the demos in directory `_pydemo`, 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:
```sh ```sh
export LLGO_LIB_PYTHON=/foo/bar/python3.12 export LLGO_LIB_PYTHON=/foo/bar/python3.12
@@ -101,9 +117,9 @@ For example, `/opt/homebrew/Frameworks/Python.framework/Versions/3.12/libpython3
export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/python3.12 export LLGO_LIB_PYTHON=/opt/homebrew/Frameworks/Python.framework/Versions/3.12/python3.12
``` ```
Then you can run the demos in directory `py/_demo`: Then you can run the demos in directory `_pydemo`:
```sh ```sh
cd <demo-directory> # eg. cd py/_demo/hellopy cd <demo-directory> # eg. cd _pydemo/callpy
llgo run . llgo run .
``` ```