diff --git a/python/binary.go b/python/binary.go
index 95b0606..14c4952 100644
--- a/python/binary.go
+++ b/python/binary.go
@@ -33,13 +33,13 @@
 	// this file must also be listed in srcs.
 	// If left unspecified, module name is used instead.
 	// If name doesn’t match any filename in srcs, main must be specified.
-	Main string `android:"arch_variant"`
+	Main *string `android:"arch_variant"`
 
 	// set the name of the output binary.
-	Stem string `android:"arch_variant"`
+	Stem *string `android:"arch_variant"`
 
 	// append to the name of the output binary.
-	Suffix string `android:"arch_variant"`
+	Suffix *string `android:"arch_variant"`
 
 	// list of compatibility suites (for example "cts", "vts") that the module should be
 	// installed into.
@@ -179,10 +179,10 @@
 func (binary *binaryDecorator) getPyMainFile(ctx android.ModuleContext,
 	srcsPathMappings []pathMapping) string {
 	var main string
-	if binary.binaryProperties.Main == "" {
+	if String(binary.binaryProperties.Main) == "" {
 		main = ctx.ModuleName() + pyExt
 	} else {
-		main = binary.binaryProperties.Main
+		main = String(binary.binaryProperties.Main)
 	}
 
 	for _, path := range srcsPathMappings {
@@ -197,11 +197,11 @@
 
 func (binary *binaryDecorator) getStem(ctx android.ModuleContext) string {
 	stem := ctx.ModuleName()
-	if binary.binaryProperties.Stem != "" {
-		stem = binary.binaryProperties.Stem
+	if String(binary.binaryProperties.Stem) != "" {
+		stem = String(binary.binaryProperties.Stem)
 	}
 
-	return stem + binary.binaryProperties.Suffix
+	return stem + String(binary.binaryProperties.Suffix)
 }
 
 // Sets the given directory and all its ancestor directories as Python packages.
diff --git a/python/python.go b/python/python.go
index 1b146a8..9d6d6a7 100644
--- a/python/python.go
+++ b/python/python.go
@@ -65,7 +65,7 @@
 	// (from a.b.c import ...) statement.
 	// if left unspecified, all the source/data files of current module are copied to
 	// "runfiles/" tree directory directly.
-	Pkg_path string `android:"arch_variant"`
+	Pkg_path *string `android:"arch_variant"`
 
 	// true, if the Python module is used internally, eg, Python std libs.
 	Is_internal *bool `android:"arch_variant"`
@@ -367,14 +367,14 @@
 	expandedData := ctx.ExpandSources(p.properties.Data, nil)
 
 	// sanitize pkg_path.
-	pkg_path := p.properties.Pkg_path
+	pkg_path := String(p.properties.Pkg_path)
 	if pkg_path != "" {
-		pkg_path = filepath.Clean(p.properties.Pkg_path)
+		pkg_path = filepath.Clean(String(p.properties.Pkg_path))
 		if pkg_path == ".." || strings.HasPrefix(pkg_path, "../") ||
 			strings.HasPrefix(pkg_path, "/") {
 			ctx.PropertyErrorf("pkg_path",
 				"%q must be a relative path contained in par file.",
-				p.properties.Pkg_path)
+				String(p.properties.Pkg_path))
 			return
 		}
 		if p.properties.Is_internal != nil && *p.properties.Is_internal {
@@ -557,3 +557,6 @@
 
 	return true
 }
+
+var Bool = proptools.Bool
+var String = proptools.String