PYTHON REQUESTS ERROR: ('Connection aborted.', OSError("(10054, 'WSAECONNRESET')")) - python-3.x

Question

I am trying to get data from a web service,working with soap. Until now, I was able to get successfull responses but now my code throws this error. Any ideas on why a working code a day before throws this error now?
Note that this is not a public API, your IP needed to be in whitelist to retrieve data.
edit for code:
import requests
headers = {'x-ibm-client-id': "MY KEY",
'content-type': 'application/soap+xml',
'accept':'application/xml'}
url="https://api.epias.com.tr/epias/exchange/electricity/balancingMarket"
login="""<soapenv:Envelope xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope">
<soapenv:Header>
<wsse:Security xmlns:wsse="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-secext-1.0.xsd" xmlns:wsu="http://docs.oasis-open.org/wss/2004/01/oasis-200401-wss-wssecurity-utility-1.0.xsd">
<wsse:UsernameToken>
<wsse:Username>string</wsse:Username>
<wsse:Password>string</wsse:Password>
<wsse:Nonce EncodingType="string">string</wsse:Nonce>
<wsu:Created>string</wsu:Created>
</wsse:UsernameToken>
<wsu:Timestamp wsu:Id="string">
<wsu:Created>string</wsu:Created>
<wsu:Expires>string</wsu:Expires>
</wsu:Timestamp>
</wsse:Security>
</soapenv:Header>
<soapenv:Body>
<dgp:login xmlns:dgp="http://ws.dgpys.deloitte.com"><!-- mandatory -->
<loginMessage>
<Password v="MYPASSWORD"></Password>
<UserName v="MYUSERNAME"></UserName>
</loginMessage>
</dgp:login>
</soapenv:Body>
"""
s=requests.Session()
s.get(url)
res=s.post(url,data=login,headers=headers)

Answer 1

keep the above code ,you should handle the proxy setting.
import urlparse,urllib2
s=requests.Session()
opener=urllib2.build_opener()
if proxy:
proxy_params={urlparse.urlparse(url).scheme : proxy}
opener.add_handler(urllib2.ProxyHandler(proxy_params))
s.get(url)
res=s.post(url,data=login,headers=headers)
if your code used to work, the site might have blocked your IP or don't like your header settings.