Improve PEP8 compliance in op_client_helper.py

 from openprocurement_client.client import Client
 import sys
 
-def prepare_api_wrapper(key='', host_url="https://api-sandbox.openprocurement.org", api_version='0.8' ):
-    return Client(key, host_url, api_version )
+
+def prepare_api_wrapper(key='', host_url="https://api-sandbox.openprocurement.org", api_version='0.8'):
+    return Client(key, host_url, api_version)
+
 
 def get_internal_id(get_tenders_function, date):
-	result = get_tenders_function({"offset": date, "opt_fields": 'tenderID', })
-	#import pdb; pdb.Pdb(stdout=sys.__stdout__).set_trace()
-	return result
+    result = get_tenders_function({"offset": date, "opt_fields": 'tenderID'})
+    return result