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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Collect the bee_waggle_6 dataset.
See the README file for more information.
Author: G.J.J. van den Burg
License: This file is part of TCPD, see the top-level LICENSE file.
Copyright: 2019, The Alan Turing Institute
"""
import argparse
import hashlib
import json
import math
import os
import zipfile
import sys
from functools import wraps
from urllib.request import urlretrieve
ZIP_URL = "https://web.archive.org/web/20191114130815if_/https://www.cc.gatech.edu/%7Eborg/ijcv_psslds/psslds.zip"
MD5_ZIP = "039843dc15c72fd5450eeb11c6e5599c"
MD5_JSON = "4f03feafecb3be0b069b3cb0d6b17d4f"
# known alternative checksums for small rounding errors
MD5_JSON_X = [
"71311783488ee5f1122545d24c15429b",
"3632e004b540de5c3eb049fb5591d044",
]
NAME_ZIP = "psslds.zip"
NAME_JSON = "bee_waggle_6.json"
class ValidationError(Exception):
def __init__(self, filename):
message = (
"Validating the file '%s' failed. \n"
"Please raise an issue on the GitHub page for this project "
"if the error persists." % filename
)
super().__init__(message)
def check_md5sum(filename, checksum):
with open(filename, "rb") as fp:
data = fp.read()
h = hashlib.md5(data).hexdigest()
return h == checksum
def validate(checksum, alt_checksums=None):
"""Decorator that validates the target file."""
def validate_decorator(func):
@wraps(func)
def wrapper(*args, **kwargs):
target = kwargs.get("target_path", None)
if os.path.exists(target) and check_md5sum(target, checksum):
return
if (
os.path.exists(target)
and alt_checksums
and any(check_md5sum(target, c) for c in alt_checksums)
):
print(
"Note: Matched alternative checksum for %s. "
"This indicates that small differences exist compared to "
"the original version of this time series, likely due to "
"rounding differences. Usually this is nothing to "
"worry about." % target,
file=sys.stderr,
)
return
out = func(*args, **kwargs)
if not os.path.exists(target):
raise FileNotFoundError("Target file expected at: %s" % target)
if not (
check_md5sum(target, checksum)
or (
alt_checksums
and any(check_md5sum(target, c) for c in alt_checksums)
)
):
print(
"Warning: Generated dataset %s didn't match a "
"known checksum. This is likely due to "
"rounding differences caused by "
"different system architectures. Minor differences in "
"algorithm performance can occur for this dataset. "
% target,
file=sys.stderr,
)
return out
return wrapper
return validate_decorator
@validate(MD5_ZIP)
def download_zip(target_path=None):
urlretrieve(ZIP_URL, target_path)
@validate(MD5_JSON, MD5_JSON_X)
def write_json(zip_path, target_path=None):
with zipfile.ZipFile(zip_path) as thezip:
with thezip.open("psslds/zips/data/sequence6/btf/ximage.btf") as fp:
ximage = [float(l.strip()) for l in fp]
with thezip.open("psslds/zips/data/sequence6/btf/yimage.btf") as fp:
yimage = [float(l.strip()) for l in fp]
with thezip.open("psslds/zips/data/sequence6/btf/timage.btf") as fp:
timage = [float(l.strip()) for l in fp]
sintimage = [math.sin(t) for t in timage]
costimage = [math.cos(t) for t in timage]
name = "bee_waggle_6"
longname = "Bee Waggle no. 6"
series = [
{"label": "x", "type": "float", "raw": ximage},
{"label": "y", "type": "float", "raw": yimage},
{"label": "sin(theta)", "type": "float", "raw": sintimage},
{"label": "cos(theta)", "type": "float", "raw": costimage},
]
data = {
"name": name,
"longname": longname,
"n_obs": len(ximage),
"n_dim": len(series),
"time": {"index": list(range(len(ximage)))},
"series": series,
}
with open(target_path, "w") as fp:
json.dump(data, fp, indent="\t")
def collect(output_dir="."):
zip_path = os.path.join(output_dir, NAME_ZIP)
json_path = os.path.join(output_dir, NAME_JSON)
download_zip(target_path=zip_path)
write_json(zip_path, target_path=json_path)
def clean(output_dir="."):
zip_path = os.path.join(output_dir, NAME_ZIP)
json_path = os.path.join(output_dir, NAME_JSON)
if os.path.exists(zip_path):
os.unlink(zip_path)
if os.path.exists(json_path):
os.unlink(json_path)
def parse_args():
parser = argparse.ArgumentParser()
parser.add_argument(
"-o", "--output-dir", help="output directory to use", default="."
)
parser.add_argument(
"action",
choices=["collect", "clean"],
help="Action to perform",
default="collect",
nargs="?",
)
return parser.parse_args()
def main():
args = parse_args()
if args.action == "collect":
collect(output_dir=args.output_dir)
elif args.action == "clean":
clean(output_dir=args.output_dir)
if __name__ == "__main__":
main()
|
