zulip_trello.py: Print error if requests isn't installed.
@@ -9,7 +9,13 @@ from __future__ import print_function
import sys
import argparse
+
+try:
import requests
+except ImportError:
+ print("Error: Please install the python requests library before running this script:")
+ print("http://docs.python-requests.org/en/master/user/install/")
+ sys.exit(1)
def get_model_id(options):
"""get_model_id
