/usr/lib/python2.7/dist-packages/chaco/scales/safetime.py is in python-chaco 4.4.1-1.2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 | """ This module wraps the standard library time module to gracefully
handle bad input values for time.
"""
import warnings
import time as stdlib_time
# Yup, we're exposing everything from time.
from time import *
from datetime import datetime, timedelta, MINYEAR, MAXYEAR
__all__ = ([x for x in dir(stdlib_time) if not x.startswith('_')]
+ ['safe_fromtimestamp', 'datetime', 'timedelta', 'MINYEAR', 'MAXYEAR',
'EPOCH'])
EPOCH = datetime.fromtimestamp(0.0)
# Can't monkeypatch methods of anything in datetime, so we have to wrap them
def safe_fromtimestamp(timestamp, *args, **kwds):
""" safe_fromtimestamp(timestamp) -> UTC time from POSIX timestamp.
Timestamps outside of the valid range will be assigned datetime objects of
Jan 1 of either MINYEAR or MAXYEAR, whichever appears closest.
WARNING: This function does not behave properly with Daylight Savings Time,
due to a documented issue with datetime arithmetic.
"""
try:
return EPOCH + timedelta(seconds=timestamp)
except (ValueError, OverflowError), e:
warnings.warn("Timestamp out of range. Returning safe default value.")
if timestamp <= 0:
return datetime(MINYEAR, 1, 1, 0, 0, 0)
else:
return datetime(MAXYEAR, 1, 1, 0, 0, 0)
def mktime(t):
""" mktime(tuple) -> floating point number
Convert a time tuple in local time to seconds since the Epoch. Invalid time
tuples will be assigned the value 0.0 and a warning will be issued.
"""
try:
return stdlib_time.mktime(t)
except (ValueError, OverflowError):
warnings.warn("Bad time for mktime(). Returning 0.")
# mktime() returns a float
return 0.0
def doy(dt):
""" Find the day of year of the datetime.
The returned DoY is in the range [1-366].
"""
date = dt.date()
jan01 = date.replace(month=1, day=1)
doy = (date - jan01).days + 1
return doy
struct_time = type(stdlib_time.localtime())
def localtime(t=None):
"""
localtime([seconds]) -> (tm_year,tm_mon,tm_day,tm_hour,tm_min,tm_sec,tm_wday,tm_yday,tm_isdst)
Convert seconds since the Epoch to a time tuple expressing local time.
When 'seconds' is not passed in, convert the current time instead.
Modified to accept timestamps before the Epoch.
"""
if t is None:
dt = datetime.now()
else:
dt = safe_fromtimestamp(t)
timetuple = (dt.year, dt.month, dt.day, dt.hour, dt.minute, dt.second,
dt.weekday(), doy(dt), -1)
return struct_time(timetuple)
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