added os.getpid()

Author: glaukiol1

main

@@ -18,6 +18,7 @@ func init() {
 		py.MustNewMethod("getcwd", getCwd, 0, "Get the current working directory"),
 		py.MustNewMethod("chdir", chdir, 0, "Change the current working directory"),
 		py.MustNewMethod("getenv", getenv, 0, "Return the value of the environment variable key if it exists, or default if it doesn’t. key, default and the result are str."),
+		py.MustNewMethod("getpid", getpid, 0, "Return the current process id."),
 	}
 
 	globals := py.StringDict{
@@ -111,3 +112,8 @@ func getenv(self py.Object, args py.Tuple) (py.Object, error) {
 		return res, nil
 	}
 }
+
+// get the current process' pid
+func getpid(self py.Object, args py.Tuple) (py.Object, error) {
+	return py.Int(os.Getpid()), nil
+}

os/os.module.go

@@ -11,3 +11,5 @@
 print("cwd() after chdir():", os.getcwd()) # should print $HOME dir
 print()
 print("getenv(\"HOME\"):", os.getenv("HOME")) # should print $HOME dir
+print()
+print("getpid():", os.getpid()) # prints the process id