Finally, a way to deploy a Python program as a statically-linked binary!
The Go code this produces looks awful. It’s more like threaded code in Go
syntax than like real Go. It translated my toy benchmark function
def count(x):
i = 1
while i <= x:
i += 1
into
// line 12: def count(x):
πF.SetLineno(12)
πTemp003 = make([]πg.FunctionArg, 1)
πTemp003[0] = πg.FunctionArg{Name: "x", Def: nil}
πTemp001 = πg.NewFunction(πg.NewCode("count", "count.py",
πTemp003, 0, func(πF *πg.Frame, πArgs []*πg.Object) (*πg.Object,
*πg.BaseException) {
var µx *πg.Object = πArgs[0]; _ = µx
var µi *πg.Object = πg.UnboundLocal; _ = µi
var πTemp001 *πg.Object
_ = πTemp001
var πTemp002 bool
_ = πTemp002
var πTemp003 *πg.Object
_ = πTemp003
var πE *πg.BaseException; _ = πE
for ; πF.State() >= 0; πF.PopCheckpoint() {
switch πF.State() {
case 0:
default: panic("unexpected function state")
}
// line 13: i = 1
πF.SetLineno(13)
µi = πg.NewInt(1).ToObject()
// line 14: while i <= x:
πF.SetLineno(14)
Label1:
if raised := πg.CheckLocal(πF, µi, "i"); raised
!= nil {
continue
}
if raised := πg.CheckLocal(πF, µx, "x"); raised
!= nil {
continue
}
if πTemp001, πE = πg.LE(πF, µi, µx); πE != nil {
continue
}
if πTemp002, πE = πg.IsTrue(πF, πTemp001); πE
!= nil {
continue
}
if !πTemp002 {
goto Label2
}
// line 15: i += 1
πF.SetLineno(15)
if raised := πg.CheckLocal(πF, µi, "i"); raised
!= nil {
continue
}
if πTemp003, πE = πg.IAdd(πF, µi,
πg.NewInt(1).ToObject()); πE != nil {
continue
}
µi = πTemp003
goto Label1
goto Label2
Label2:
return nil, nil
}
return nil, πE
}), πF.Globals()).ToObject()
It’s also about 2x slower than the original Python. All of this indirection is
necessary to preserve the dynamic semantics of Python. Basically it’s taking
the calls into the runtime that a Python interpreter would make, and writing
them out one after another.
So don’t expect it to be a way to magically migrate your old Python project to
idiomatic Go.
But what it does provide is Python with goroutines instead of the GIL, and with
extension modules written in Go instead of C.
Andy
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