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PyVRP/VRPLIB
Allow numpy 2

Currently, vrplib depends on numpy 2, but with numpy 2.0 having been out since June it is probably time to relax this requirement. We should check the package works with numpy 2 and later, and then update ...
good first issue
maintenance
  • N-Wouda
  • Opened 
    on Oct 13, 2024
  • #123

PyVRP/VRPLIB
Ordering issue in VRPLIB files

This: EDGE_WEIGHT_SECTION 0 1544 1944 1931 1476 1726 0 1992 1427 1593 1965 1975 0 621 1090 2063 1433 647 0 818 1475 1594 1090 828 0 EDGE_WEIGHT_TYPE : EXPLICIT EDGE_WEIGHT_FORMAT ...
  • N-Wouda
  • Opened 
    on Mar 16, 2024
  • #118

PyVRP/VRPLIB
Parse large instances with 15K or 30K nodes

The large instances of Arnold, Gendreau and Sörensen (2017) in CVRPLIB currently hang on the edge weight calculations. These instances are very large, ranging between 6-30K nodes. Let s see if we can support ...
enhancement
  • N-Wouda
  • 4
  • Opened 
    on Mar 16, 2024
  • #117

PyVRP/VRPLIB
Reindex sections based on indices

Suppose my VRPLIB file has the following section: NODE_SECTION 1 40 50 3 20 20 2 20 10 VRPLIB parses this as [[40, 50], [20, 20], [20, 10]], which ignores that the third and second node are provided ...
  • N-Wouda
  • Opened 
    on Mar 7, 2024
  • #116

PyVRP/VRPLIB
VRPLIB v2

This issue keeps track of plans for a new major release of VRPLIB. This is a long-term goal and will be developed in parallel with the needs of PyVRP. vrplib (v1) was originally designed to support any ...
discussion
release-notes
  • leonlan
  • 2
  • Opened 
    on Mar 1, 2024
  • #114

PyVRP/VRPLIB
Handle rounding conventions

PyVRP uses the DIMACS rounding convention for two of its benchmark sets. This rounding convention can be added to the VRPLIB format so that we don t have to pass a custom round_func to each benchmark instance ...
enhancement
  • leonlan
  • 1
  • Opened 
    on Feb 21, 2024
  • #111

PyVRP/VRPLIB
Extend VRPLIB format with arc list

VRPLIB format currently does not support data about arc duration/distances. This could be nice because (1) explicit full matrices are too large to save and contain many redundant values and (2) coordinates ...
enhancement
  • leonlan
  • Opened 
    on Feb 10, 2024
  • #110

PyVRP/VRPLIB
Ragged arrays

It is currently assumed that all data sections are presented as tabular data, which is then conveniently parsed using np.genfromtxt. This may be too restrictive for more general VRP variants. For instance, ...
enhancement
  • leonlan
  • Opened 
    on Sep 21, 2023
  • #108

PyVRP/VRPLIB
Deprecate downloading instances

The download support is a bit flaky and limited to CVRPLIB. I am going to add deprecation warnings to this feature in subsequent minor versions, and remove it in V2.
maintenance
  • leonlan
  • Opened 
    on Sep 18, 2023
  • #107

PyVRP/VRPLIB
Distance Matrix Rounding

I m having trouble understanding the rules for rounding in the edge_weight matrix. Below is a code where I calculate the cost by using edge_weight matrix of instance from vrplib and compare it with the ...
question
  • boraaktas
  • 4
  • Opened 
    on Aug 17, 2023
  • #106
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