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pip - Cleaning up packages installed globally

I've been using Anaconda as my package manager but was unaware that it is recommended to install additional packages within virtual environments rather than globally. As a result, I've been installing all packages in my base environment by simply opening a terminal window and running commands such as:

pip3 install requests_html

conda install sklearn

This seemed to work fine for a while until I recently decided to try updating my packages. I tried running

conda update --all

which then provided a list of all the packages that will be updated. However, it also said that some packages will be downgraded instead, which after some googling seems to be due to version conflicts which is why environments are recommended.

Sample output:

Collecting package metadata (current_repodata.json): done
Solving environment: done

## Package Plan ##

  environment location: /Users/mahuja/opt/anaconda3


The following packages will be downloaded:

    package                    |            build
    ---------------------------|-----------------
    _anaconda_depends-2020.07  |           py38_0           6 KB
    anaconda-custom            |           py38_1          35 KB
    anaconda-navigator-1.10.0  |           py38_0         6.2 MB
    anaconda-project-0.9.1     |     pyhd3eb1b0_1         215 KB
    appdirs-1.4.4              |             py_0          13 KB
    appnope-0.1.2              |py38hecd8cb5_1001          10 KB
    argon2-cffi-20.1.0         |   py38haf1e3a3_1          44 KB
    asn1crypto-1.4.0           |             py_0          80 KB
    
    backports-1.0              |     pyhd3eb1b0_2         210 KB
    backports.functools_lru_cache-1.6.1|     pyhd3eb1b0_0          12 KB
    backports.shutil_get_terminal_size-1.0.0|     pyhd3eb1b0_3          10 KB
    backports.tempfile-1.0     |     pyhd3eb1b0_1          11 KB
    beautifulsoup4-4.9.3       |     pyha847dfd_0          86 KB
    bitarray-1.6.3             |   py38h9ed2024_1          92 KB
    black-19.10b0              |             py_0          86 KB
    bleach-3.2.2               |     pyhd3eb1b0_0         113 KB
    blosc-1.20.1               |       hab81aa3_0          56 KB
    bokeh-2.2.3                |           py38_0         5.3 MB
    brotli-1.0.9               |       hb1e8313_2         398 KB
    brotlipy-0.7.0             |py38h9ed2024_1003         331 KB
    gevent-21.1.1              |   py38h9ed2024_1         1.5 MB
    giflib-5.1.4               |       h1de35cc_1          59 KB
    glib-2.66.1                |       h9bbe63b_0         2.7 MB
    glob2-0.7                  |     pyhd3eb1b0_0          12 KB
    greenlet-0.4.17            |   py38haf1e3a3_0          20 KB
    idna-2.10                  |     pyhd3eb1b0_0          52 KB
    imagecodecs-2021.1.11      |   py38h2ea9c00_1         5.4 MB
    importlib-metadata-2.0.0   |             py_1          35 KB
    importlib_metadata-2.0.0   |                1          11 KB
    iniconfig-1.1.1            |     pyhd3eb1b0_0           8 KB
    intervaltree-3.1.0         |             py_0          26 KB
    ipykernel-5.3.4            |   py38h5ca1d4c_0         180 KB
    ipython-7.19.0             |   py38h01d92e1_1         991 KB
    ipython_genutils-0.2.0     |     pyhd3eb1b0_1          27 KB
    ipywidgets-7.6.3           |     pyhd3eb1b0_1         105 KB
    isort-5.6.4                |             py_0          78 KB
    jedi-0.17.2                |   py38hecd8cb5_1         923 KB
    jinja2-2.11.2              |     pyhd3eb1b0_0          93 KB
    joblib-1.0.0               |     pyhd3eb1b0_0         208 KB
    jsonschema-3.2.0           |             py_2          47 KB
    jupyter_client-6.1.7       |             py_0          77 KB
    jupyter_console-6.2.0      |             py_0          26 KB
    jupyter_core-4.7.0         |   py38hecd8cb5_0          68 KB
    jupyterlab-2.2.6           |             py_0         3.4 MB
    jupyterlab_pygments-0.1.2  |             py_0           8 KB
    jupyterlab_widgets-1.0.0   |     pyhd3eb1b0_1         109 KB
    jxrlib-1.1                 |       haf1e3a3_2         206 KB
    matplotlib-base-3.3.2      |   py38h181983e_0         5.1 MB
    mkl_fft-1.2.0              |   py38hc64f4ea_0         143 KB
    mock-4.0.3                 |     pyhd3eb1b0_0          29 KB
    more-itertools-8.6.0       |     pyhd3eb1b0_0          40 KB
    msgpack-python-1.0.1       |   py38hf7b0b51_0          75 KB
    mypy_extensions-0.4.3      |           py38_0           9 KB
    nbclient-0.5.1             |             py_0          58 KB
    nbconvert-6.0.7            |           py38_0         483 KB
    nbformat-5.1.2             |     pyhd3eb1b0_1          68 KB
    nest-asyncio-1.4.3         |     pyhd3eb1b0_0          11 KB
    networkx-2.5               |             py_0         1.1 MB
    nose-1.3.7                 |  pyhd3eb1b0_1006         128 KB
    notebook-6.2.0             |   py38hecd8cb5_0         4.1 MB
    numba-0.51.2               |   py38h6440ff4_1         3.1 MB
    numexpr-2.7.2              |   py38h16bde0e_0         120 KB
    numpy-1.19.2               |   py38h456fd55_0          21 KB
    numpy-base-1.19.2          |   py38hcfb5961_0         4.0 MB
    numpydoc-1.1.0             |     pyhd3eb1b0_1          42 KB
    openjpeg-2.3.0             |       hb95cd4c_1         281 KB
    openpyxl-3.0.6             |     pyhd3eb1b0_0         159 KB
    openssl-1.1.1i             |       h9ed2024_0         2.2 MB
    packaging-20.8             |     pyhd3eb1b0_0          36 KB
    pandas-1.2.1               |   py38hb2f4e1b_0         8.3 MB
    pandoc-2.11                |       h0dc7051_0        10.8 MB
    pandocfilters-1.4.3        |   py38hecd8cb5_1          14 KB
    path-15.0.1                |   py38hecd8cb5_0          37 KB
    path.py-12.5.0             |                0           4 KB
    pathlib2-2.3.5             |   py38hecd8cb5_2          38 KB
    pathspec-0.7.0             |             py_0          26 KB
    pexpect-4.8.0              |     pyhd3eb1b0_3          53 KB
    pickleshare-0.7.5          |  pyhd3eb1b0_1003          13 KB
    pillow-8.1.0               |   py38h5270095_0         590 KB
    pip-20.3.3                 |   py38hecd8cb5_0         1.8 MB
    pkginfo-1.7.0              |   py38hecd8cb5_0          43 KB
    prometheus_client-0.9.0    |     pyhd3eb1b0_0          45 KB
    prompt-toolkit-3.0.8       |             py_0         248 KB
    prompt_toolkit-3.0.8       |                0          12 KB
    psutil-5.7.2               |   py38haf1e3a3_0         341 KB
    ptyprocess-0.7.0           |     pyhd3eb1b0_2          17 KB
    py-1.10.0                  |     pyhd3eb1b0_0          76 KB
    pycurl-7.43.0.6            |   py38hddc9c9b_0          66 KB
    pydocstyle-5.1.1           |             py_0          38 KB
    pyerfa-1.7.1.1             |   py38h9ed2024_1         296 KB
    pygments-2.7.4             |     pyhd3eb1b0_0         676 KB
    pylint-2.6.0               |           py38_0         438 KB
    pyls-black-0.4.6           |       hd3eb1b0_0           9 KB
    pyls-spyder-0.3.0          |     pyhd3eb1b0_0          10 KB
    pyopenssl-20.0.1           |     pyhd3eb1b0_1          49 KB
    pyparsing-2.4.7            |     pyhd3eb1b0_0          59 KB
    pyrsistent-0.17.3          |   py38haf1e3a3_0          89 KB
    pytest-6.2.1               |   py38hecd8cb5_0         427 KB
    python-3.8.5               |       h26836e1_1        20.6 MB
    python-jsonrpc-server-0.4.0|             py_0          12 KB
    python-language-server-0.36.2|     pyhd3eb1b0_0          41 KB
    python-libarchive-c-2.9    |     pyhd3eb1b0_0          46 KB
    python.app-3               |   py38h9ed2024_0          20 KB
    pytz-2020.5                |     pyhd3eb1b0_0         182 KB
    pywavelets-1.1.1           |   py38haf1e3a3_2         3.4 MB
    pyyaml-5.4.1               |   py38h9ed2024_1         165 KB
    pyzmq-20.0.0               |   py38h23ab428_1         405 KB
    qtawesome-1.0.1            |             py_0         757 KB
    qtconsole-4.7.7            |             py_0          96 KB
    regex-2020.11.13           |   py38h9ed2024_0         310 KB
    requests-2.25.1            |     pyhd3eb1b0_0          52 KB
    ripgrep-12.1.1             |                0         1.3 MB
    rope-0.18.0                |             py_0         126 KB
    scikit-image-0.17.2        |   py38h81aa140_0         8.9 MB
    scikit-learn-0.23.2        |   py38h959d312_0         4.7 MB
    scipy-1.5.2                |   py38h2515648_0        13.3 MB
    seaborn-0.11.1             |     pyhd3eb1b0_0         212 KB
    send2trash-1.5.0           |     pyhd3eb1b0_1          14 KB
    setuptools-51.3.3          |   py38hecd8cb5_4         727 KB
    singledispatch-3.4.0.3     |          py_1001          12 KB
    six-1.15.0                 |   py38hecd8cb5_0          27 KB
    snowballstemmer-2.1.0      |     pyhd3eb1b0_0          62 KB
    sortedcollections-2.1.0    |     pyhd3eb1b0_0          12 KB
    sortedcontainers-2.3.0     |     pyhd3eb1b0_0          26 KB
    soupsieve-2.1              |     pyhd3eb1b0_0          31 KB
    sphinx-3.4.3               |     pyhd3eb1b0_0         1.1 MB
    sphinxcontrib-websupport-1.2.4|             py_0          34 KB
    spyder-4.2.0               |   py38hecd8cb5_0         5.7 MB
    spyder-kernels-1.10.1      |   py38hecd8cb5_0         101 KB
    sqlalchemy-1.3.21          |   py38h9ed2024_0         1.5 MB
    sqlite-3.33.0              |       hffcf06c_0         1.3 MB
    statsmodels-0.12.1         |   py38h9ed2024_0         8.2 MB
    sympy-1.7.1                |   py38hecd8cb5_0         8.8 MB
    tbb-2020.3                 |       h879752b_0         147 KB
    tblib-1.7.0                |             py_0          16 KB
    terminado-0.9.2            |   py38hecd8cb5_0          25 KB
    three-merge-0.1.1          |     pyhd3eb1b0_0          10 KB
    tifffile-2021.1.14         |     pyhd3eb1b0_1         126 KB
    toolz-0.11.1               |     pyhd3eb1b0_0          46 KB
    tornado-6.1                |   py38h9ed2024_0         585 KB
    tqdm-4.55.1                |     pyhd3eb1b0_0          77 KB
    traitlets-5.0.5            |             py_0          83 KB
    typed-ast-1.4.2            |   py38h9ed2024_1         183 KB
    typing_extensions-3.7.4.3  |             py_0          28 KB
    ujson-4.0.2                |   py38h23ab428_0          46 KB
    unixodbc-2.3.9             |       haf1e3a3_0         251 KB
    urllib3-1.26.2             |     pyhd3eb1b0_0         105 KB
    watchdog-0.10.4            |   py38h9ed2024_0          96 KB
    wheel-0.36.2               |     pyhd3eb1b0_0          33 KB
    wrapt-1.11.2               |   py38h9ed2024_0          45 KB
    xlrd-2.0.1                 |     pyhd3eb1b0_0          90 KB
    xlsxwriter-1.3.7           |             py_0         108 KB
    xlwings-0.21.4             |   py38hecd8cb5_0         446 KB
    zeromq-4.3.3               |       hb1e8313_3         414 KB
    zfp-0.5.5                  |       h23ab428_4         147 KB
    zipp-3.4.0                 |     pyhd3eb1b0_0          15 KB
    zope.event-4.5.0           |           py38_0         209 KB
    zope.interface-5.2.0       |   py38h9ed2024_0         281 KB
    ------------------------------------------------------------
                                           Total:       201.5 MB

The following NEW packages will be INSTALLED:

  _anaconda_depends  pkgs/main/osx-64::_anaconda_depends-2020.07-py38_0
  appdirs            pkgs/main/noarch::appdirs-1.4.4-py_0

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