Fix the error: cannot import name 'MultiHostDsn' from 'pydantic.networks'

Solve the Pydantic error with Poetry: cannot import name MultiHostDsn from pydantic.network

As it is a rule in this blog, let’s jump quick to the solution and write a few lines of code that should solve your problem. For example, if your using poetry as your dependencies manager, you can add the Pydantic package in its v1 version, v1.10 minor version and the latest patch v.10.1 till the latest (currently v.1.10.13 is the latest version). More about package Semantic Versioning convention here.

To solve this error while using Poetry, just enter this in the terminal and the poetry project folder:

poetry add pydantic=^1.10

Then, you can check you Pydantic package version from the poetry.lock as:

poetry show pydantic

or even

poetry show pydantic | awk '/version { print $3 }'

If the change is not occurring and the env get stuck, you can always drop your environment, clear cache (shouldd’t be required) and lock/install again the pyproject file.

Solve the error with Pip ot Pipenv: cannot import name MultiHostDsn from pydantic.network

If you are using pip/pipenv you can easily do:

pip install --upgrade pydantic==1.10.*

If you are interested in more info, you can check the GitHub issue conversation and the PR fixing the problem that has been included in the >=1.10 release.