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{{tag>Brouillon Dev Code Go Python}}


# Inclure des appels à Go lang dans Python

Voir :
* https://fluhus.github.io/snopher/ et https://github.com/fluhus/snopher

Voir aussi :
* [[Executer du code Python avec Go lang]]


## Tuto 1

Source : https://dev.to/leapcell/how-to-call-go-code-in-python-accelerate-python-with-go-54if



Linux and Mac

~~~bash
go build -buildmode=c-shared -o add.so add.go
~~~

windows
~~~bash
go build -buildmode=c-shared -o add.dll add.go
~~~

~~~bash
go build -ldflags "-s -w" -buildmode=c-shared -o add.so add.go
~~~

`-s` indicates compression
`-w` indicates removing debugging 

~~~python
# Test calling code written in the GO language from Python
# First, the GO code needs to be compiled into a dynamic link library

from ctypes import cdll

lib = cdll.LoadLibrary("./add.so")  # Specify the compiled dynamic link library file here

# Call the Add function in the GO language
result = lib.Add(100, 200)

print("result ", result)

# Call the PrintDll function in the GO language
lib.PrintDll()
~~~


## Tuto 2

Source : https://medium.com/analytics-vidhya/running-go-code-from-python-a65b3ae34a2d

### Exemple 1

`library.go`
~~~go
package main

import (
   "C"
   "log"
)

//export helloWorld
func helloWorld(){
   log.Println("Hello World")
}

func main(){

}
~~~

Compilation de la lib
~~~bash
go build -buildmode=c-shared -o library.so library.go
~~~


Execution depuis Python
~~~python
import ctypes
library = ctypes.cdll.LoadLibrary('./library.so')
hello_world = library.helloWorld
hello_world()
~~~


### Exemple 2

`library.go`
~~~go
//export hello
func hello(namePtr *C.char){
   name := C.GoString(namePtr)
   log.Println("Hello", name)
}
~~~

`app.py`
~~~python
hello = library.hello
hello.argtypes = [ctypes.c_char_p]
hello("everyone".encode('utf-8'))
~~~

`library.go`
~~~go
//export farewell
func farewell() *C.char{
   return C.CString("Bye!")
}
~~~






FIXME