AttributeError module builtins has no attribute SERVER_MODE

[Simon Casley]

Hi - When running setup.py for pgAdmin4 v3.5, I get the following error:

(pgadmin435) 
root@cclgis01-dev:/opt/webapps/pgAdmin4/pgadmin435/lib/python3.5/site-packages/pgadmin4#
 python setup.py
Traceback (most recent call last):
  File "setup.py", line 15, in <module>
    from pgadmin.model import db, Version, SCHEMA_VERSION as 
CURRENT_SCHEMA_VERSION
  File 
"/opt/webapps/pgAdmin4/pgadmin435/lib/python3.5/site-packages/pgadmin4/pgadmin/__init__.py",
 line 33, in <module>
    from pgadmin.utils.session import create_session_interface, pga_unauthorised
  File 
"/opt/webapps/pgAdmin4/pgadmin435/lib/python3.5/site-packages/pgadmin4/pgadmin/utils/session.py",
 line 26, in <module>
    import config
  File 
"/opt/webapps/pgAdmin4/pgadmin435/lib/python3.5/site-packages/pgadmin4/config.py",
 line 121, in <module>
    if builtins.SERVER_MODE is None:
AttributeError: module 'builtins' has no attribute 'SERVER_MODE'

Any idea what the issue is?

Thanks
Simon