diff --git a/README.md b/README.md
index 6621400..2dcf346 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,5 @@
 # vue-google-oauth2
 Handling Google sign-in and sign-out for Vue.js applications.
-Forked from https://github.com/TinyNova/vue-google-oauth
 
 
 ## Installation
@@ -38,7 +37,7 @@ Please Don't use `plus.login` scope. [It will be deprecated.](https://developers
 ## Methods
 | Property     | Description        | Type     |
 |--------------|--------------------|----------|
-| GoogleAuth   | return of gapi.auth2.getAuthInstance()   | Object |
+| GoogleAuth   | return of [gapi.auth2.getAuthInstance()](https://developers.google.com/identity/sign-in/web/reference#gapiauth2authresponse)   | Object |
 | isAuthorized | Whether or not you have auth | Boolean  |
 | isInit       | Whether or not api init | Boolean  |
 | isLoaded     | Whether or not api init. will be deprecated. | Function  |
@@ -70,6 +69,9 @@ this.$gAuth.signIn()
 .then(GoogleUser => {
   // On success do something, refer to https://developers.google.com/api-client-library/javascript/reference/referencedocs#googleusergetid
   console.log('user', GoogleUser)
+  // GoogleUser.getId() : Get the user's unique ID string.
+  // GoogleUser.getBasicProfile() : Get the user's basic profile information.
+  // GoogleUser.getAuthResponse() : Get the response object from the user's auth session. access_token and so on
   this.isSignIn = this.$gAuth.isAuthorized
 })
 .catch(error  => {
@@ -107,6 +109,7 @@ curl -d "client_id=YOUR_CLIENT_ID&\
 
 ### Sample Code
 - [Golang](https://github.com/guruahn/vue-google-oauth2/blob/master/backend-samples/golang/main.go)
+- [Python](https://github.com/guruahn/vue-google-oauth2/blob/master/backend-samples/python/main.py)
 
 ## Additional Help
 - [sample login page HTML file](https://github.com/guruahn/vue-google-oauth2/blob/master/sample.html).
diff --git a/backend-samples/python/main.py b/backend-samples/python/main.py
new file mode 100644
index 0000000..d2d6af8
--- /dev/null
+++ b/backend-samples/python/main.py
@@ -0,0 +1,21 @@
+# python example for the exchange of auth code to refresh token
+# Reference: https://oauth2client.readthedocs.io/en/latest/source/oauth2client.client.html#
+
+from oauth2client import client
+
+CLIENT_ID = 'YOUR_CLIENT_ID'
+
+CLIENT_SECRET = 'YOUR_CLIENT_SECRET'
+
+
+if __name__ == "__main__":
+    auth_code = 'auth_code_from_client'
+
+    try:
+        credentials = client.credentials_from_code(CLIENT_ID, CLIENT_SECRET, scope='', code=auth_code)
+    except client.FlowExchangeError as e:
+        print(e)
+    else:
+        print('refresh_token:', credentials.refresh_token)
+        print('access_token:', credentials.access_token)
+        print('token_expiry:', credentials.token_expiry)
diff --git a/index.js b/index.js
index 8eaf3b0..5eb6cde 100644
--- a/index.js
+++ b/index.js
@@ -7,7 +7,7 @@ var googleAuth = (function () {
       var script = document.createElement('script')
       script.src = apiUrl
       script.onreadystatechange = script.onload = function () {
-        if (!script.readyState || /loaded|compvare/.test(script.readyState)) {
+        if (!script.readyState || /loaded|complete/.test(script.readyState)) {
           setTimeout(function () {
             resolve()
           }, 500)
diff --git a/package.json b/package.json
index 00d987b..fa0dcc0 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "vue-google-oauth2",
-  "version": "1.3.2",
+  "version": "1.3.3",
   "description": "Handling Google Auth2 sign-in and sign-out",
   "main": "index.js",
   "scripts": {