works with README.md and authen script

Author: Wasin Waeosri

README.md

@@ -13,10 +13,10 @@ This is an example project that shows how to implement TRKD REST Client with pyt
 
 # prerequisite
 The following softwares are required to use this script
-- Python 2.7.10
+- Python 2.7.10 or above
 - The [requests](http://docs.python-requests.org/en/master/) library 
 
-The script does not support Python 3!
+The scripts support Python 2 only
 
 # how to run the script
 Run the script via the command line (or shell)
@@ -36,6 +36,17 @@ The best way is to get the pip package management tool
 	export https_proxy="http://<proxy.server>:<port>"
 	$>pip install requests
 	```
+# Optional - How to run with Python 3
+You can modify the scripts to run with Python 3 (with requests library installed) by just change the code from "**raw_input()**" to "**input()**" as the following example
+	- Python 2
+	```
+	username = raw_input('Please input username: ')
+	```
+	- Python 3
+	```
+	username = input('Please input username: ')
+	```
+
 #Releae Note
 - Version 1: 6 Sep 2016
     - trkd_authen.py

trkd_authen.py

@@ -7,46 +7,49 @@
 Please see the Thomson Reuters Knowledge Direct product page at http://customers.thomsonreuters.com 
 for additional information regarding the TRKD API.'''
 
-
-import os
 import sys
-import requests
 import json
 import getpass
+import requests
+
 
-##Get username, password and applicationid
-username = raw_input('Please input username: ')
-##use getpass.getpass to hide user inputted password
-password = getpass.getpass(prompt='Please input password: ')
-appid = raw_input('Please input appid: ')
-
-print '############### Sending Authentication request message to TRKD ###############'
-
-##create authentication request URL, message and header
-authenMsg = {'CreateServiceToken_Request_1': { 'ApplicationID':appid, 'Username':username,'Password':password }}
-authenURL = 'https://api.trkd.thomsonreuters.com/api/TokenManagement/TokenManagement.svc/REST/Anonymous/TokenManagement_1/CreateServiceToken_1'
-headers = {'content-type': 'application/json;charset=utf-8'}
-
-try:
-    ##send request
-    result = requests.post(authenURL, data = json.dumps(authenMsg), headers=headers)
-    if result.status_code == 200:
-        print 'Request success'
-        print 'response status %s'%(result.status_code)
-        ##get Token
-        token = result.json()['CreateServiceToken_Response_1']['Token']
-        print 'Token: %s'%(token)
-        ##get expiraion
-        expire = result.json()['CreateServiceToken_Response_1']['Expiration']
-        print 'Exipre: %s'%(expire)
-    elif result.status_code == 500:
-        print 'Request fail'
-        print 'response status %s'%(result.status_code)
-        print 'Error: %s'%(result.json())
-except requests.exceptions.RequestException as e:
-    print 'Exception!!!'
-    print e
-    sys.exit(1)
+if __name__ == '__main__':
+    ## Get username, password and applicationid
+    username = raw_input('Please input username: ')
+    ## use getpass.getpass to hide user inputted password
+    password = getpass.getpass(prompt='Please input password: ')
+    appid = raw_input('Please input appid: ')
+    print('############### Sending Authentication request message to TRKD ###############')
+
+    ##create authentication request URL, message and header
+    authenMsg = {'CreateServiceToken_Request_1': { 'ApplicationID':appid, 'Username':username,'Password':password }}
+    authenURL = 'https://api.trkd.thomsonreuters.com/api/TokenManagement/TokenManagement.svc/REST/Anonymous/TokenManagement_1/CreateServiceToken_1'
+    headers = {'content-type': 'application/json;charset=utf-8'}
+
+    try:
+        ## send request
+        result = requests.post(authenURL, data = json.dumps(authenMsg), headers=headers)
+        ## request success
+        if result.status_code == 200:
+            print('Request success')
+            print('response status %s'%(result.status_code))
+            ##get Token
+            token = result.json()['CreateServiceToken_Response_1']['Token']
+            print('Token: %s'%(token))
+            ##get expiraion
+            expire = result.json()['CreateServiceToken_Response_1']['Expiration']
+            print('Expire: %s'%(expire))
+        ## handle error
+        else:
+            print('Request fail')
+            print('response status %s'%(result.status_code))
+            if result.status_code == 500: ## if username or password or appid is wrong
+                print('Error: %s'%(result.json()))
+            result.raise_for_status()
+    except requests.exceptions.RequestException as e:
+        print('Exception!!!')
+        print(e)
+        sys.exit(1)