python - pip error "ValueError: ('Missing distribution spec', '==')" when installing pandas on ubuntu server -

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hi started playing servers , supposed run simple script in python. script however, has dependencies, ie packages, pandas.

so decided pip install pandas == 0.14.0 kept getting error message:

exception: traceback (most recent call last):   file "/root/.virtualenvs/occupy/local/lib/python2.7/site-packages/pip/basecomm     status = self.run(options, args)   file "/root/.virtualenvs/occupy/local/lib/python2.7/site-packages/pip/commands     installrequirement.from_line(name, none))   file "/root/.virtualenvs/occupy/local/lib/python2.7/site-packages/pip/req.py",     return cls(req, comes_from, url=url, prereleases=prereleases)   file "/root/.virtualenvs/occupy/local/lib/python2.7/site-packages/pip/req.py",     req = pkg_resources.requirement.parse(req)   file "/root/.virtualenvs/occupy/local/lib/python2.7/site-packages/pip/_vendor/     reqs = list(parse_requirements(s))   file "/root/.virtualenvs/occupy/local/lib/python2.7/site-packages/pip/_vendor/     raise valueerror("missing distribution spec", line) valueerror: ('missing distribution spec', '==')  storing debug log failure in /root/.pip/pip.log

and have no idea why.

can please shed light on this?

there should no spaces pip install pandas==0.14.0 # <- not pandas == 0.14.0


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