If you just need a conda environment with python 3.4.
That is, you would install normal conda with python 3.8, create an environment with python 3.4:
>conda create --name py34 python=3.4 --channel free
>conda activate py34
>python
Python 3.4.5 |Continuum Analytics, Inc.| (default, Jul 5 2016, 14:53:07) [MSC v.1600 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>>
More details here: How to install deprecated/unsupported Python 3.4 on conda environment? and Creating python 3.3 environment in Anaconda
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