According to https://github.com/kennethreitz/requests/issues/749#issuecomment-19187417 there is no need to install pyasn1-modules.

8 年前 · 0af50e8505
--- a/requirements.txt
+++ b/requirements.txt
 
															 lxml==3.7.1
														
 
															 ndg-httpsclient==0.4.2
														
 
															 pyasn1==0.1.9
														
 
															-pyasn1-modules==0.0.8
														
 
															 pygments==2.1.3
														
 
															 pyopenssl==16.2.0
														
 
															 python-dateutil==2.5.3