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I tried using the purge command to install the library, but to my sorrow, no bash file was created. I didn't mention before, but when I typed the sudo rosdep init, I got this message:

Traceback (most recent call last): File "/usr/local/bin/rosdep", line 4, in <module> import pkg_resources File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2749, in <module> working_set = WorkingSet._build_master() File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 444, in _build_master ws.require(__requires__) File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 725, in require needed = self.resolve(parse_requirements(requirements)) File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 628, in resolve raise DistributionNotFound(req) pkg_resources.DistributionNotFound: rosdep==0.11.2

And for the rosdep update command, I got:Traceback (most recent call last):

File "/usr/local/bin/rosdep", line 4, in <module> import pkg_resources File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2749, in <module> working_set = WorkingSet._build_master() File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 444, in _build_master ws.require(__requires__) File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 725, in require needed = self.resolve(parse_requirements(requirements)) File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 628, in resolve raise DistributionNotFound(req) pkg_resources.DistributionNotFound: rosdep==0.11.2