thank you for your response.
but i can install other softwares but failed to install pwapi with following error
Exception:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/pip/basecommand.py", line 122, in main
status = self.run(options, args)
File "/usr/local/lib/python2.7/dist-packages/pip/commands/install.py", line 278, in run
requirement_set.prepare_files(finder, force_root_egg_info=self.bundle, bundle=self.bundle)
File "/usr/local/lib/python2.7/dist-packages/pip/req.py", line 1197, in prepare_files
do_download,
File "/usr/local/lib/python2.7/dist-packages/pip/req.py", line 1375, in unpack_url
self.session,
File "/usr/local/lib/python2.7/dist-packages/pip/download.py", line 546, in unpack_http_url
resp = session.get(target_url, stream=True)
File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/sessions.py", line 468, in get
return self.request('GET', url, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/pip/download.py", line 237, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/sessions.py", line 456, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/sessions.py", line 585, in send
history = [resp for resp in gen] if allow_redirects else []
File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/sessions.py", line 179, in resolve_redirects
allow_redirects=False,
File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/sessions.py", line 559, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/dist-packages/pip/_vendor/requests/adapters.py", line 378, in send
raise ProxyError(e)
ProxyError: ('Cannot connect to proxy.', error('Tunnel connection failed: 403 Forbidden',))
[edited by admin: formatting]