osu! pp and difficulty calculator. pure python implementation of https://github.com/Francesco149/oppai-ng

this is meant to be a standalone single-file module that's as portable as possible using only python 2.6+ builtins with no extra dependencies

if you need a command line interface, check out oppai-ng

if you need a more object oriented implementation, check out oppadc

usage

pyttanko is a single-file module, so the simplest way to use it is to simply drop it in your project's folder:

cd my/project
curl https://raw.githubusercontent.com/Francesco149/pyttanko/master/pyttanko.py > pyttanko.py

this way, anyone who clones your project won't have to install pyttanko as it will be bundled

if you prefer, it's also available on pip

pip install pyttanko

or you can also manually install like so:

curl -L https://github.com/Francesco149/pyttanko/archive/HEAD.tar.gz -o HEAD.tar.gz
cd pyttanko-*
python setup.py install --user

check out

pydoc pyttanko

or

python -c "help('pyttanko')"

for the full documentation

minimal example:

#!/usr/bin/env python

import sys
import pyttanko as osu

p = osu.parser()
bmap = p.map(sys.stdin)

stars = osu.diff_calc().calc(bmap)
print("%g stars" % stars.total)

pp, _, _, _, _ = osu.ppv2(stars.aim, stars.speed, bmap=bmap)
print("%g pp" % pp)

which you can run with:

cat /path/to/file.osu | ./example.py

performance

pyttanko runs the test suite over 10 times slower than the original C implementation and uses ~8 times more memory, so if you need to batch process thousands of scores, you should consider writing native bindings for the C version.

tests were performed on linux 4.9.38, python 2.7.10 on a i7-4790k

this is still a pretty respectable speed considering python is interpreted

$ cd ~/src/pyttanko/
$ time -v ./run_test
...
    Command being timed: "./run_test"
    User time (seconds): 101.68
    System time (seconds): 0.61
    Percent of CPU this job got: 99%
    Elapsed (wall clock) time (h:mm:ss or m:ss): 1m 42.34s
    Average shared text size (kbytes): 0
    Average unshared data size (kbytes): 0
    Average stack size (kbytes): 0
    Average total size (kbytes): 0
    Maximum resident set size (kbytes): 88688
    Average resident set size (kbytes): 0
    Major (requiring I/O) page faults: 0
    Minor (reclaiming a frame) page faults: 631637
    Voluntary context switches: 1
    Involuntary context switches: 4116
    Swaps: 0
    File system inputs: 0
    File system outputs: 56
    Socket messages sent: 0
    Socket messages received: 0
    Signals delivered: 0
    Page size (bytes): 4096
    Exit status: 0

$ cd ~/src/oppai-ng/test
$ ./build
$ time -v ./oppai_test
...
    Command being timed: "./oppai_test"
    User time (seconds): 9.09
    System time (seconds): 0.06
    Percent of CPU this job got: 99%
    Elapsed (wall clock) time (h:mm:ss or m:ss): 0m 9.15s
    Average shared text size (kbytes): 0
    Average unshared data size (kbytes): 0
    Average stack size (kbytes): 0
    Average total size (kbytes): 0
    Maximum resident set size (kbytes): 11840
    Average resident set size (kbytes): 0
    Major (requiring I/O) page faults: 0
    Minor (reclaiming a frame) page faults: 304
    Voluntary context switches: 1
    Involuntary context switches: 39
    Swaps: 0
    File system inputs: 0
    File system outputs: 0
    Socket messages sent: 0
    Socket messages received: 0
    Signals delivered: 0
    Page size (bytes): 4096
    Exit status: 0