Replacing requests with urllib to resolve forbidden issues + other small error handling.

pytrials/utils.py

@@ -2,33 +2,33 @@
 import requests
 import csv
 import re
+import json
 
 
 def request_ct(url):
     """Performs a get request that provides a (somewhat) useful error message."""
     try:
-        response = requests.get(url)
-        response.raise_for_status()
-    except requests.HTTPError as ex:
+        import urllib.request
+        response = urllib.request.urlopen(url.replace(" ", "%20"))
+        return response
+    except urllib.error.HTTPError as ex:
         raise ex
     except ImportError:
         raise ImportError(
             "Couldn't retrieve the data, check your search expression or try again later."
         )
-    else:
-        return response
-
 
 def json_handler(url):
     """Returns request in JSON (dict) format"""
-    return request_ct(url).json()
+    response = request_ct(url)
+    return json.loads(response.read().decode('utf-8'))
 
 
 def csv_handler(url):
     """Returns request in CSV (list of records) format"""
 
     response = request_ct(url)
-    decoded_content = response.content.decode("utf-8")
+    decoded_content = response.read().decode("utf-8")
 
     cr = csv.reader(decoded_content.splitlines(), delimiter=",")
     records = list(cr)