diff --git a/cmd/gython/main.go b/cmd/gython/main.go
deleted file mode 100644
index e1b5689..0000000
--- a/cmd/gython/main.go
+++ /dev/null
@@ -1,54 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"os"
-
-	"github.com/brettlangdon/gython/ast"
-	"github.com/brettlangdon/gython/compiler"
-	"github.com/brettlangdon/gython/grammar"
-	"github.com/brettlangdon/gython/scanner"
-	"github.com/brettlangdon/gython/token"
-)
-
-func tokenize() {
-	tokenizer := scanner.NewScanner(os.Stdin)
-	for {
-		tok := tokenizer.NextToken()
-		tokenRange := fmt.Sprintf("%d,%d-%d,%d:", tok.LineStart, tok.ColumnStart, tok.LineEnd, tok.ColumnEnd)
-		literalRep := fmt.Sprintf("%#v", tok.Literal)
-		fmt.Printf("%-20s%-15s%-15s\n", tokenRange, tok.String(), literalRep)
-		if tok.ID == token.ENDMARKER || tok.ID == token.ERRORTOKEN {
-			break
-		}
-	}
-}
-
-func parseGrammar() *grammar.FileInput {
-	tokenizer := scanner.NewScanner(os.Stdin)
-	gp := grammar.NewGrammarParser(tokenizer)
-	return gp.Parse()
-}
-
-func parseAST() ast.Mod {
-	start := parseGrammar()
-	mod, err := ast.ASTFromGrammar(start)
-	if err != nil {
-		panic(err)
-	}
-	return mod
-}
-
-func compile() {
-	root := parseAST()
-	codeobject := compiler.CompileAST(root)
-	fmt.Println(codeobject)
-}
-
-func main() {
-	// start := parseGrammar()
-	// fmt.Println(start.Repr())
-	// root := parseAST()
-	// fmt.Println(root)
-	compile()
-}
diff --git a/compiler/compiler.go b/compiler/compiler.go
index 405b16d..70f71d6 100644
--- a/compiler/compiler.go
+++ b/compiler/compiler.go
@@ -49,7 +49,7 @@ func (compiler *Compiler) assemble(addNone bool) *gython.CodeObject {
 		compiler.addOp(bytecode.RETURN_VALUE)
 	}
 
-	codeobject := gython.NewCodeObject()
+	codeobject := gython.NewCodeObject([]byte{}, []byte{}, 0)
 	return codeobject
 }
 
diff --git a/gython/bytes.go b/gython/bytes.go
new file mode 100644
index 0000000..2090d1d
--- /dev/null
+++ b/gython/bytes.go
@@ -0,0 +1,10 @@
+package gython
+
+type Bytes struct {
+}
+
+func (bytes *Bytes) object() {}
+
+func NewBytes() *Bytes {
+	return &Bytes{}
+}
diff --git a/gython/codeobject.go b/gython/codeobject.go
index d883980..07f0457 100644
--- a/gython/codeobject.go
+++ b/gython/codeobject.go
@@ -1,8 +1,27 @@
 package gython
 
 type CodeObject struct {
+	ArgCount            int64
+	KeywordOnlyArgCount int64
+	LocalsCount         int64
+	StackSize           int64
+	Flags               int64
+
+	Code              *Bytes
+	Constants         *Tuple
+	Names             *Tuple
+	VariableNames     *Tuple
+	FreeVariableNames *Tuple
+	CellVariableNames *Tuple
+
+	Filename        *Unicode
+	Name            *Unicode
+	FirstLineNumber int64
+	LineNumberTable *Bytes
 }
 
-func NewCodeObject() *CodeObject {
+func NewCodeObject(filename []byte, name []byte, firstLineNumber int64) *CodeObject {
 	return &CodeObject{}
 }
+
+func (codeobject *CodeObject) object() {}
diff --git a/gython/float.go b/gython/float.go
new file mode 100644
index 0000000..cffbdf7
--- /dev/null
+++ b/gython/float.go
@@ -0,0 +1,5 @@
+package gython
+
+type Float struct {
+	Value float64
+}
diff --git a/gython/long.go b/gython/long.go
new file mode 100644
index 0000000..3cee8ea
--- /dev/null
+++ b/gython/long.go
@@ -0,0 +1,5 @@
+package gython
+
+type Long struct {
+	Value float64
+}
diff --git a/gython/object.go b/gython/object.go
new file mode 100644
index 0000000..b1d648b
--- /dev/null
+++ b/gython/object.go
@@ -0,0 +1,5 @@
+package gython
+
+type Object interface {
+	object()
+}
diff --git a/gython/tuple.go b/gython/tuple.go
new file mode 100644
index 0000000..b1f7ce0
--- /dev/null
+++ b/gython/tuple.go
@@ -0,0 +1,10 @@
+package gython
+
+type Tuple struct {
+}
+
+func (tuple *Tuple) object() {}
+
+func NewTuple() *Tuple {
+	return &Tuple{}
+}
diff --git a/gython/unicode.go b/gython/unicode.go
new file mode 100644
index 0000000..26a15fd
--- /dev/null
+++ b/gython/unicode.go
@@ -0,0 +1,10 @@
+package gython
+
+type Unicode struct {
+}
+
+func (unicode *Unicode) object() {}
+
+func NewUnicode() *Unicode {
+	return &Unicode{}
+}