Database KnotInfo
This repository contains a snapshot of the complete content of the KnotInfo and LinkInfo databases. Each database is provided as a Python list of Python dictionaries. The data are from the corresponding Excel spreadsheets available on the KnotInfo and LinkInfo homepages on the date of release.
This repository was created as a part of the SageMath interface to these databases (see Sage Trac ticket #30352) but can also be used independently.
In Python, it can be used as follows:
>>> from database_knotinfo import link_list
>>> k = link_list()
>>> len(k)
2979
>>> names_k = k[0]
>>> type(names_k)
<type 'dict'>
>>> names_k['braid_index']
'Braid Index'
>>> k2 = k[2]
>>> k2['name']
'3_1'
>>> k2['braid_index']
'2'
>>> k2['homfly_polynomial']
'(2*v^2-v^4)+(v^2)*z^2'
>>> l = link_list(proper_links=True)
>>> len(l)
4189
>>> names_l = l[0]
>>> type(names_l)
<type 'dict'>
>>> names_l['braid_notation']
'Braid Notation'
>>> l2 = l[2]
>>> l2['name']
'L2a1{1}'
>>> l2['homflypt_polynomial']
'v/z-v^3/z + v*z'
To build a new release, the CSV files can be upgraded with the
create_knotinfo_csv.py script. A cronjob
executes it on the first day of every month and creates a new
release if differences are detected.
Installation
Python
pip install database_knotinfo
SageMath
Once ticket #30352 is released, the database can be installed in Sage by:
sage -i database_knotinfo
This will contain integration with the knot and link functionality of Sage. Of course the flat Python functionality is already available by:
sage -pip install database_knotinfo
Versioning
Version numbers are automatically generated every month if differences to the original databases are detected. They follow the scheme
<year>.<month>.<day>
Help
If you note a divergence between this repository and the original data in case the current release is older than a month please create an issue about that.
Credits
Many thanks to Chuck Livingston and Allison Moore for making the data available. For further acknowledgments see the corresponding homepages.
1 maintainer
Metadata
1 maintainer
Release files for database-knotinfo 2021.7.21
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| database_knotinfo-2021.7.21.tar.gz | 4.0 MB | Details |
Built distribution (wheel)
| File | Interpreter | ABI | Platform | Reset |
|---|---|---|---|---|
| database_knotinfo-2021.7.21-py3-none-any.whl | Python 3 | none | any | Details |
Total release size: 8.2 MB
Release files / database_knotinfo-2021.7.21.tar.gz
| Download URL | database_knotinfo-2021.7.21.tar.gz |
|---|---|
| Size | 4.0 MB |
| Tags | Source |
|
SHA-256 checksum How to use checksums |
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Release files / database_knotinfo-2021.7.21-py3-none-any.whl
| Download URL | database_knotinfo-2021.7.21-py3-none-any.whl |
|---|---|
| Size | 4.2 MB |
| Tags | Python 3 |
|
SHA-256 checksum How to use checksums |
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| Uploaded via |
twine/3.4.2 importlib_metadata/4.6.1 pkginfo/1.7.1 requests/2.26.0 requests-toolbelt/0.9.1 tqdm/4.61.2 CPython/3.9.6
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