Error on installing packages on python

Question

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

Answer 1

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

Answer 2

You should install msgpack and then install pandas again.

Answer 3

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.

Answer 4

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.

Answer 5

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.

Answer 6

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

run these commands