Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Being nice to the server: Wrapping a REST API for a cosmological
  distance/velocity calculator with Python   In this paper we present PyCF3, a python client for the cosmological
distance-velocity calculator CosmicFlow-3. The project has a cache and retry
system designed with the objective of reducing the stress on the server and
mitigating the waiting times of the users in the calculations. We also address
Quality Assurance code standards and availability of the code.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph