import datetime
import fcntl
import socket
import struct
from contextlib import contextmanager
from enum import Enum
from ereuse_devicehub.ereuse_utils import Dumpeable
class Severity(Enum):
Info = 'Info'
Error = 'Error'
def get_hw_addr(ifname):
# http://stackoverflow.com/a/4789267/1538221
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
info = fcntl.ioctl(s.fileno(), 0x8927, struct.pack('256s', ifname[:15]))
return ':'.join('%02x' % ord(char) for char in info[18:24])
class Measurable(Dumpeable):
"""A base class that allows measuring execution times."""
def __init__(self) -> None:
super().__init__()
self.elapsed = None
@contextmanager
def measure(self):
init = datetime.datetime.now(datetime.timezone.utc)
yield
self.elapsed = datetime.datetime.now(datetime.timezone.utc) - init
try:
assert self.elapsed.total_seconds() > 0
except AssertionError:
self.elapsed = datetime.timedelta(seconds=0)
