CODEWITHSUNDEEP
pythonanacondaconda
mrgloom
mrgloom

Reputation: 21622

conda install downgrade python version

I'm trying to downgrade python version of anaconda via conda install python=3.3, but have following error:

~/anaconda3/bin$ ./conda install python=3.3
Fetching package metadata .........
Solving package specifications: .


UnsatisfiableError: The following specifications were found to be in conflict:
  - gevent -> python 2.6*
  - python 3.3*
Use "conda info <package>" to see the dependencies for each package.

How to resolve conflicts with the packages?

Upvotes: 68

Views: 298594

Answers (4)

hrithikpy7336
hrithikpy7336

Reputation: 131

First check the current version using command python --version. Then on anaconda prompt type the command conda search python which will list all the python versions available till date. Then from that list select your version and type conda install python=3.5.2 or any of your choice.

Upvotes: 13

JAdel
JAdel

Reputation: 1616

There are two ways to downgrade python in anaconda.

1. Downgrade python in the active environment

(This can lead to conflicts with installed packages for higher python versions)

conda activate nameOfYourEnvironment
conda install python=3.3

2. Create a new environment

(This is a more safer way, but you need to reinstall all packages)

conda activate base
conda create --name env_name python=3.3

Hint: Use conda list before creating a new environment to get the names of all installed packages in the recent environment.

If you want to check your installed environments, use:

conda env list

If you had problems with the installation, make sure that you run the shell as administrator (always recommended).

Upvotes: 28

CermakM
CermakM

Reputation: 2022

If you want to set specific version, use it like this:

WARNING: This command will overwrite the default python version system-wise

conda install python=3.6


To create environment with a specific version, you can do:

conda create -n $PYTHON36_ENV_NAME python=3.6 anaconda  # set custom env name

The anaconda at the end allows the env to use all anaconda packages


For more information refere to Anaconda documentation

Upvotes: 113

ally-e
ally-e

Reputation: 1585

You can make environments with other versions of Python using this command:

conda create --name py33 python=3.3
source activate py33

Upvotes: 9

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