Error When Using biocLite as an installer in rpy2 python library
You're using an outdated version of R. You can use the R 4.0 from conda-forge channel, just create an environment with r-base and then install rpy2, the latest version compatible with R 4.0 is available through pip
conda create -n rpy2 -c conda-forge r-base
conda activate rpy2
pip install rpy2

Now you can use rpy2 with R 4.0 in your python code.
import rpy2.robjects as robjects
robjects.r('install.packages(&quot;BiocManager&quot;, '
           'repos=&quot;http://cran.r-project.org&quot;)')
robjects.r('BiocManager::install(&quot;seqLogo&quot;)')
robjects.r('library(seqLogo)')

Remember deactivate your env with conda deactivate.