127 lines
3.5 KiB
Python
127 lines
3.5 KiB
Python
import hashlib
|
|
import os
|
|
import random
|
|
import string
|
|
import tempfile
|
|
import re
|
|
import time
|
|
import urllib
|
|
|
|
from datetime import datetime
|
|
from datetime import timedelta
|
|
|
|
def checksum(file_path, blocksize=65536):
|
|
hasher = hashlib.sha256()
|
|
with open(file_path, 'r') as f:
|
|
buf = f.read(blocksize)
|
|
|
|
while len(buf) > 0:
|
|
hasher.update(buf)
|
|
buf = f.read(blocksize)
|
|
return hasher.hexdigest()
|
|
return None
|
|
|
|
def create_working_folder():
|
|
temporary_folder = tempfile.gettempdir()
|
|
folder = os.path.join(temporary_folder, random_string(10), random_string(10))
|
|
os.makedirs(folder)
|
|
|
|
return (temporary_folder, folder)
|
|
|
|
def download_file(name, destination):
|
|
try:
|
|
final_name = '{}/{}{}'.format(destination, random_string(10), os.path.splitext(name)[1])
|
|
urllib.urlretrieve(
|
|
'https://s3.amazonaws.com/jmathai/github/elodie/{}'.format(name),
|
|
final_name
|
|
)
|
|
return final_name
|
|
except Exception as e:
|
|
return False
|
|
|
|
def get_file(name):
|
|
file_path = get_file_path(name)
|
|
if not os.path.isfile(file_path):
|
|
return False
|
|
|
|
return file_path
|
|
|
|
def get_file_path(name):
|
|
current_folder = os.path.dirname(os.path.realpath(__file__))
|
|
return os.path.join(current_folder, 'files', name)
|
|
|
|
def get_test_location():
|
|
return (61.013710, 99.196656, 'Siberia')
|
|
|
|
def populate_folder(number_of_files):
|
|
folder = '%s/%s' % (tempfile.gettempdir(), random_string(10))
|
|
os.makedirs(folder)
|
|
|
|
for x in range(0, number_of_files):
|
|
ext = 'jpg' if x % 2 == 0 else 'txt'
|
|
fname = '%s/%s.%s' % (folder, x, ext)
|
|
with open(fname, 'a'):
|
|
os.utime(fname, None)
|
|
|
|
return folder
|
|
|
|
def random_string(length):
|
|
return ''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(length))
|
|
|
|
def random_decimal():
|
|
return random.random()
|
|
|
|
def random_coordinate(coordinate, precision):
|
|
# Here we add to the decimal section of the coordinate by a given precision
|
|
return coordinate + ((10.0 / (10.0**precision)) * random_decimal())
|
|
|
|
def temp_dir():
|
|
return tempfile.gettempdir()
|
|
|
|
def is_windows():
|
|
return os.name == 'nt'
|
|
|
|
# path_tz_fix(file_name)
|
|
# Change timestamp in file_name by the offset
|
|
# between UTC and local time, i.e.
|
|
# 2015-12-05_00-59-26-with-title-some-title.jpg ->
|
|
# 2015-12-04_20-59-26-with-title-some-title.jpg
|
|
# (Windows only)
|
|
|
|
def path_tz_fix(file_name):
|
|
if is_windows():
|
|
# Calculate the offset between UTC and local time
|
|
tz_shift = (datetime.fromtimestamp(0) -
|
|
datetime.utcfromtimestamp(0)).seconds/3600
|
|
# replace timestamp in file_name
|
|
m = re.search('(\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2})',file_name)
|
|
t_date = datetime.fromtimestamp(time.mktime(time.strptime(m.group(0), '%Y-%m-%d_%H-%M-%S')))
|
|
s_date_fix = (t_date-timedelta(hours=tz_shift)).strftime('%Y-%m-%d_%H-%M-%S')
|
|
return re.sub('\d{4}-\d{2}-\d{2}_\d{2}-\d{2}-\d{2}',s_date_fix,file_name)
|
|
else:
|
|
return file_name
|
|
|
|
# time_convert(s_time)
|
|
# Change s_time (struct_time) by the offset
|
|
# between UTC and local time
|
|
# (Windows only)
|
|
|
|
def time_convert(s_time):
|
|
if is_windows():
|
|
return time.gmtime((time.mktime(s_time)))
|
|
else:
|
|
return s_time
|
|
|
|
|
|
# isclose(a,b,rel_tol)
|
|
# To compare float coordinates a and b
|
|
# with relative tolerance c
|
|
|
|
def isclose(a, b, rel_tol = 1e-8):
|
|
if not isinstance(a, (int, float)) or not isinstance(b, (int, float)):
|
|
return False
|
|
|
|
diff = abs(a - b)
|
|
return (diff <= abs(rel_tol * a) and
|
|
diff <= abs(rel_tol * b))
|