# Pip uninstall nupic pycapnp artifact

**URL:** <https://discourse.numenta.org/t/pip-uninstall-nupic-pycapnp-artifact/2432>\
**Category:** NuPIC\
**Tags:** python\
**Created:** [June 19, 2017, 4:51pm UTC](https://discourse.numenta.org/t/pip-uninstall-nupic-pycapnp-artifact/2432 "2017-06-19T16:51:26Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![rhyolight](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/rhyolight/32/3922_2.png) [@rhyolight](https://discourse.numenta.org/u/rhyolight)\
**Post date:** [June 19, 2017, 4:51pm UTC](https://discourse.numenta.org/t/pip-uninstall-nupic-pycapnp-artifact/2432/1 "2017-06-19T16:51:27Z")

</div>

Maybe there are some seasoned python users who can help me out with this problem…

I can run `pip install nupic --user` and then `pip uninstall nupic -y` without problems, but if I run `pip uninstall nupic -y` any more times, I get an error because of NuPIC’s `pycapnp` dependency:

```auto
∙ pip install nupic --user
Collecting nupic
  Using cached nupic-0.8.0-py2-none-any.whl
Requirement already satisfied: mock==1.0.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Collecting nupic.bindings==0.7.0 (from nupic)
  Using cached nupic.bindings-0.7.0-cp27-cp27m-macosx_10_11_intel.whl
Requirement already satisfied: python-dateutil==2.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: PyMySQL==0.6.2 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: pyproj==1.9.3 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: ordereddict==1.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: unittest2==0.5.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: pytest-cov==2.5.0 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: pytest==3.0.7 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: prettytable==0.7.2 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Collecting pycapnp==0.5.12; platform_system == "Linux" or platform_system == "Darwin" (from nupic)
Requirement already satisfied: validictory==0.9.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: asteval==0.9.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: pytest-xdist==1.16.0 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: numpy==1.12.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: PyYAML==3.10 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: DBUtils==1.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: psutil==1.0.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: coverage==3.7.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from nupic)
Requirement already satisfied: six in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from python-dateutil==2.1->nupic)
Requirement already satisfied: setuptools in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from pytest==3.0.7->nupic)
Requirement already satisfied: py>=1.4.29 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from pytest==3.0.7->nupic)
Requirement already satisfied: execnet>=1.1 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from pytest-xdist==1.16.0->nupic)
Requirement already satisfied: apipkg>=1.4 in /Users/mtaylor/Library/Python/2.7/lib/python/site-packages (from execnet>=1.1->pytest-xdist==1.16.0->nupic)
Installing collected packages: pycapnp, nupic.bindings, nupic
  Found existing installation: nupic.bindings 0.7.2.dev0
    Uninstalling nupic.bindings-0.7.2.dev0:
      Successfully uninstalled nupic.bindings-0.7.2.dev0
Successfully installed nupic-0.8.0 nupic.bindings-0.7.0 pycapnp-0.5.12
❤ ★ ↑ +829 (master ᄉ origin) ~/nta/nupic
∙ pip uninstall nupic -y
Uninstalling nupic-0.8.0:
  Successfully uninstalled nupic-0.8.0
❤ ★ ↑ +829 (master ᄉ origin) ~/nta/nupic
∙ pip uninstall nupic -y
Exception:
Traceback (most recent call last):
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/basecommand.py", line 215, in main
    status = self.run(options, args)
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/commands/uninstall.py", line 76, in run
    requirement_set.uninstall(auto_confirm=options.yes)
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/req/req_set.py", line 346, in uninstall
    req.uninstall(auto_confirm=auto_confirm)
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/req/req_install.py", line 607, in uninstall
    if not self.check_if_exists():
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/req/req_install.py", line 1036, in check_if_exists
    self.req.name
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/_vendor/pkg_resources/ __init__.py", line 558, in get_distribution
    dist = get_provider(dist)
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/_vendor/pkg_resources/ __init__.py", line 432, in get_provider
    return working_set.find(moduleOrReq) or require(str(moduleOrReq))[0]
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/_vendor/pkg_resources/ __init__.py", line 968, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/Users/mtaylor/Library/Python/2.7/lib/python/site-packages/pip/_vendor/pkg_resources/ __init__.py", line 859, in resolve
    raise VersionConflict(dist, req).with_context(dependent_req)
ContextualVersionConflict: (pycapnp 0.5.12 (/Users/mtaylor/Library/Python/2.7/lib/python/site-packages), Requirement.parse('pycapnp==0.5.8'), set(['nupic']))

```

I run `pip uninstall nupic -y` as a part of scripts that help me bounce between versions, so I hate constantly seeing this error if I have already uninstalled.

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<div class="post-metadata">

**Author:** ![vkruglikov](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/vkruglikov/32/474_2.png) [@vkruglikov](https://discourse.numenta.org/u/vkruglikov)\
**Post date:** [June 19, 2017, 6:32pm UTC](https://discourse.numenta.org/t/pip-uninstall-nupic-pycapnp-artifact/2432/2 "2017-06-19T18:32:30Z")

</div>

You might have some nupic “turds” left over from past installation conflicts. As a matter of habit, I always run uninstall an extra time (I don’t use -y, but that probably doesn’t matter), just to make sure that I don’t have some old version lying around, and don’t have problems. You may need to go to your site-packages and grep for nupic as well as search for files/directories there starting with “nupic”. It may require some manual cleanup.

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<div class="post-metadata">

**Author:** ![rhyolight](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/rhyolight/32/3922_2.png) [@rhyolight](https://discourse.numenta.org/u/rhyolight)\
**Post date:** [June 19, 2017, 6:43pm UTC](https://discourse.numenta.org/t/pip-uninstall-nupic-pycapnp-artifact/2432/3 "2017-06-19T18:43:07Z")

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It’s not from previous installations. If I `pip uninstall pycapnp`, then subsequent `pip uninstall nupic` expected returns:

```
Cannot uninstall requirement nupic, not installed

```

So it is something happening in the installation that just occurred. To test I uninstalled them both and ran `pip uninstall nupic` and it worked fine. The error only starts after I’ve installed and uninstalled nupic.

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<div class="post-metadata">

**Author:** ![vkruglikov](https://yyz2.discourse-cdn.com/flex030/user_avatar/discourse.numenta.org/vkruglikov/32/474_2.png) [@vkruglikov](https://discourse.numenta.org/u/vkruglikov)\
**Post date:** [June 19, 2017, 6:56pm UTC](https://discourse.numenta.org/t/pip-uninstall-nupic-pycapnp-artifact/2432/4 "2017-06-19T18:56:58Z")

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Hmmm… I always uninstall nupic without uninstalling pycapnp and don’t recall running into this issue. Sorry, I’m not sure what’s going on.