Bio.Alphabet import error for Biopython 1.78

[Mamie Wang]

Bio.Alphabet module was recently removed in Biopython 1.78 (Sep 2020) and this gave an import error from IO.py.

File "/home/mw957/project/conda_envs/r_env/lib/python3.7/site-packages/presto/IO.py", line 15, in <module>
    from Bio.Alphabet import IUPAC
  File "/home/mw957/project/conda_envs/r_env/lib/python3.7/site-packages/Bio/Alphabet/__init__.py", line 21, in <module>
    "Bio.Alphabet has been removed from Biopython. In many cases, the alphabet can simply be ignored and removed from scripts. In a few cases, you may need to specify the ``molecule_type`` as an annotation on a SeqRecord for your script to work correctly. Please see https://biopython.org/wiki/Alphabet for more information."
ImportError: Bio.Alphabet has been removed from Biopython. In many cases, the alphabet can simply be ignored and removed from scripts. In a few cases, you may need to specify the ``molecule_type`` as an annotation on a SeqRecord for your script to work correctly. Please see https://biopython.org/wiki/Alphabet for more information.

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[Jason Vander Heiden]

This looks like a duplicate of #76. Can you check that the error still persists for the version in master?

[Jason Vander Heiden]

Fixed in version 0.6.2.