Gai(error-2, name or service name not known) when using requests.post in Python from raspberry pi

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Linux

Python

Raspberry-Pi

I am trying to send web request to my php code via linux running on raspberry pi. I am using putty to access the OS. When I am running the code, I am getting gai error-2. Below is my code:

<pre>import requests
values = {'"firstname":' "abc ", '"lastname":' "xyz"}
r = requests.post('http://rts.msmq.site/security.php', data=values)

I am unable to figure out the problem. Can someone let me know what could be the issue? I am using linux.

What I have tried:

I tried other libraries including urllib still it is not working..
ping for the URL works fine.
nslookup returns:

Server: UnKnown Address: 2a02:908:2:a::1 Non-authoritative answer: Name: rts.msmq.site Address: 50.87.147.175

Request for the same PHP file can be sent from matlab