Biopython: ImportError: No module named TreeConstruction

Question

[sivanc7]

Hi to all! Someone knows why I get the following error?

>>> from Bio.Phylo.TreeConstruction import DistanceCalculator, DistanceTreeConstructor

Traceback (most recent call last):
  File "<pyshell#6>", line 1, in <module>
    import Bio.Phylo.TreeConstruction
ImportError: No module named TreeConstruction

And also:

>>> from Bio.Phylo.Consensus import *

Traceback (most recent call last):
  File "<pyshell#9>", line 1, in <module>
    from Bio.Phylo.Consensus import *
ImportError: No module named Consensus

Thanks to all for you time =)

Answer 1

[GouthamAtla]

Which version of BioPython are you using ? You can check version:

python -c 'import Bio; print Bio.__version__'
python -c 'from Bio.Phylo.TreeConstruction import DistanceCalculator, DistanceTreeConstructor'

is working in BioPython 1.65.

[sivanc7]

version 1.65. But this is weird, it works in the terminal, but not in the python IDLE !

Answer 2

[sivanc7]

Ok. Fixed!

The problem was that in the python IDLE, the version of biopython was 1.63, whereas the code

>>>from Bio.Phylo.TreeConstruction import DistanceCalculator, DistanceTreeConstructor

works nice for version 1.65. So, the solution was delete the folder where biopython 1.63 was installed and download and later (re)install the biopython 1.65.

[GouthamAtla]

Good to know it works now. :)