pymsym
libmsym is a C library dealing with point group symmetry in molecules. pymsym is its python interface.
about
this library was originally developed by Marcus Johansson. the original library can be found here and seems unmaintained - after reaching out to the initial authors, i've decided to fork this so i can maintain it.
for more info, read the blog post.
installation
use pip:
pip install pymsym
api
there are two high-level functions, pymsym.get_point_group() and pymsym.get_symmetry_number().
here's a simple introduction:
import pymsym
# water
atomic_numbers = [8, 1, 1]
positions = [
[0.007544053252786398, 0.39774343371391296, 0.0],
[-0.7671031355857849, -0.18439316749572754, 0.0],
[0.7595590949058533, -0.21335026621818542, 0.0]
]
pymsym.get_point_group(atomic_numbers, positions) # returns C2v
print(pymsym.get_symmetry_number(atomic_numbers, positions)) # returns 2
the original lower-level classes from libmsym can also be accessed (pymsym.Element, etc).
point groups
here's all the point groups that pymsym can handle. some of these haven't been tested very well, please let me know if there are issues.
point_groups = [
"C1", "Cs", "Ci", "C2", "C3", "C4", "C5", "C6", "C7", "C8",
"D2", "D3", "D4", "D5", "D6", "D7", "D8", "C2v", "C3v", "C4v",
"C5v", "C6v", "C7v", "C8v", "C2h", "C3h", "C4h", "C5h", "C6h",
"C7h", "C8h", "D2h", "D3h", "D4h", "D5h", "D6h", "D7h", "D8h",
"D2d", "D3d", "D4d", "D5d", "D6d", "D7d", "D8d", "S4", "S6",
"S8", "T", "Th", "Td", "O", "Oh", "Cinfv", "Dinfh", "I", "Kh"
]
Corin Wagen, 2024
1 maintainer
Metadata
1 maintainer
Release files for pymsym 0.3.5
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Source distribution (sdist)
| File | Size | Uploaded | Provenance | Actions |
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| pymsym-0.3.5.tar.gz | 89.0 kB | Without provenance | Details for pymsym-0.3.5.tar.gz |
Built distributions (wheels)
Total release size: 1.9 MB
Release files / pymsym-0.3.5.tar.gz
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