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I tried to install pandas on my cmd and this is the output

Requirement already satisfied: pandas in c:\users\name\anaconda3\lib\site-packages (0.23.0) Requirement already satisfied: python-dateutil>=2.5.0 in c:\users\name\anaconda3\lib\site-packages (from pandas) (2.7.3) Requirement already satisfied: pytz>=2011k in c:\users\name\anaconda3\lib\site-packages (from pandas) (2018.4) Requirement already satisfied: numpy>=1.9.0 in c:\users\name\anaconda3\lib\site-packages (from pandas) (1.14.3) Requirement already satisfied: six>=1.5 in c:\users\name\anaconda3\lib\site-packages (from python-dateutil>=2.5.0->pandas) (1.11.0) **distributed 1.21.8 requires msgpack, which is not installed.**

This last line is in red.

Im on windows 10, I installed anaconda

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6 Answers 6

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This seems to work for me. First I tried 

pip install msgpack

And if you need this too,

pip install msgpack-python

Then install whatever you need. In your case, 

conda install pandas
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1

You should install msgpack and then install pandas again.

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How can I install the msgpack?
Just like you install any other package.
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How are you installing pandas? If you're using Anaconda, then

conda install pandas

is typically enough to make everything work. This is because Anaconda is using binary installs - it is uploading prebuilt code and has already done the combinatorics to make everything work together - and it gets everything it needs for a package.

Sometimes, of course, you have to go into a dependency combination that is tough, or you are pulling from non-core Anaconda repos, etc. In that case, you can try

conda install msgpack # or pip install msgpack # or conda install -c conda-forge msgpack

The right choice sort of depends on what you're doing. Using the -c flag with conda gives you access to non-core repositories - these carry fewer guarantees about working together, but gives you access to many more versions of the package, usually.

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I am getting a similar error when trying to install pymc3. I solved it by using conda rather than pip.

The first time I used pip install pymc3 and I got the same error as you:

distributed 1.21.8 requires msgpack, which is not installed

Then I installed using conda instead: conda install pymc3, and it installed fine.

My understanding is that conda handles all the dependent packages for you, which pip does not.

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I found this on the Anaconda site:

Use anaconda to install msgpack for python with this command:

conda install -c conda-forge msgpack-python

It seems to have worked for me.

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0 
conda install pip pip uninstall -y msgpack-python pip install msgpack TCIP-scheduler

run these commands

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