Python datetime 模块，utcfromtimestamp() 实例源码
我们从Python开源项目中，提取了以下29个代码示例，用于说明如何使用datetime.utcfromtimestamp()。
def test_NaT_methods(self):
# GH 9513
raise_methods = ['astimezone', 'combine', 'ctime', 'dst',
'fromordinal', 'fromtimestamp', 'isocalendar',
'strftime', 'strptime', 'time', 'timestamp',
'timetuple', 'timetz', 'toordinal', 'tzname',
'utcfromtimestamp', 'utcnow', 'utcoffset',
'utctimetuple']
nat_methods = ['date', 'now', 'replace', 'to_datetime', 'today']
nan_methods = ['weekday', 'isoweekday']
for method in raise_methods:
if hasattr(NaT, method):
self.assertRaises(ValueError, getattr(NaT, method))
for method in nan_methods:
if hasattr(NaT, method):
self.assertTrue(np.isnan(getattr(NaT, method)()))
for method in nat_methods:
if hasattr(NaT, method):
self.assertIs(getattr(NaT, method)(), NaT)
# GH 12300
self.assertEqual(NaT.isoformat(), 'NaT')
def test_class_ops_pytz(self):
tm._skip_if_no_pytz()
from pytz import timezone
def compare(x, y):
self.assertEqual(int(Timestamp(x).value / 1e9),
int(Timestamp(y).value / 1e9))
compare(Timestamp.now(), datetime.now())
compare(Timestamp.now('UTC'), datetime.now(timezone('UTC')))
compare(Timestamp.utcnow(), datetime.utcnow())
compare(Timestamp.today(), datetime.today())
current_time = calendar.timegm(datetime.now().utctimetuple())
compare(Timestamp.utcfromtimestamp(current_time),
datetime.utcfromtimestamp(current_time))
compare(Timestamp.fromtimestamp(current_time),
datetime.fromtimestamp(current_time))
date_component = datetime.utcnow()
time_component = (date_component + timedelta(minutes=10)).time()
compare(Timestamp.combine(date_component, time_component),
datetime.combine(date_component, time_component))
def test_class_ops_dateutil(self):
tm._skip_if_no_dateutil()
from dateutil.tz import tzutc
def compare(x, y):
self.assertEqual(int(np.round(Timestamp(x).value / 1e9)),
int(np.round(Timestamp(y).value / 1e9)))
compare(Timestamp.now(), datetime.now())
compare(Timestamp.now('UTC'), datetime.now(tzutc()))
compare(Timestamp.utcnow(), datetime.utcnow())
compare(Timestamp.today(), datetime.today())
current_time = calendar.timegm(datetime.now().utctimetuple())
compare(Timestamp.utcfromtimestamp(current_time),
datetime.utcfromtimestamp(current_time))
compare(Timestamp.fromtimestamp(current_time),
datetime.fromtimestamp(current_time))
date_component = datetime.utcnow()
time_component = (date_component + timedelta(minutes=10)).time()
compare(Timestamp.combine(date_component, time_component),
datetime.combine(date_component, time_component))
def test_utcfromtimestamp(self):
import time
ts = time.time()
expected = time.gmtime(ts)
got = self.theclass.utcfromtimestamp(ts)
self.verify_field_equality(expected, got)
def test_insane_utcfromtimestamp(self):
# It's possible that some platform maps time_t to double,
# and that this test will fail there. This test should
# exempt such platforms (provided they return reasonable
# results!).
for insane in -1e200, 1e200:
self.assertRaises(ValueError, self.theclass.utcfromtimestamp,
insane)
def test_negative_float_utcfromtimestamp(self):
d = self.theclass.utcfromtimestamp(-1.05)
self.assertEqual(d, self.theclass(1969, 12, 31, 23, 59, 58, 950000))
def test_utcnow(self):
import time
# Call it a success if utcnow() and utcfromtimestamp() are within
# a second of each other.
tolerance = timedelta(seconds=1)
for dummy in range(3):
from_now = self.theclass.utcnow()
from_timestamp = self.theclass.utcfromtimestamp(time.time())
if abs(from_timestamp - from_now) <= tolerance:
break
# Else try again a few times.
self.assertLessEqual(abs(from_timestamp - from_now), tolerance)
def test_tzinfo_fromtimestamp(self):
import time
meth = self.theclass.fromtimestamp
ts = time.time()
# Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
base = meth(ts)
# Try with and without naming the keyword.
off42 = FixedOffset(42, "42")
another = meth(ts, off42)
again = meth(ts, tz=off42)
self.assertIs(another.tzinfo, again.tzinfo)
self.assertEqual(another.utcoffset(), timedelta(minutes=42))
# Bad argument with and w/o naming the keyword.
self.assertRaises(TypeError, meth, ts, 16)
self.assertRaises(TypeError, meth, ts, tzinfo=16)
# Bad keyword name.
self.assertRaises(TypeError, meth, ts, tinfo=off42)
# Too many args.
self.assertRaises(TypeError, meth, ts, off42, off42)
# Too few args.
self.assertRaises(TypeError, meth)
# Try to make sure tz= actually does some conversion.
timestamp = 1000000000
utcdatetime = datetime.utcfromtimestamp(timestamp)
# In POSIX (epoch 1970), that's 2001-09-09 01:46:40 UTC, give or take.
# But on some flavor of Mac, it's nowhere near that. So we can't have
# any idea here what time that actually is, we can only test that
# relative changes match.
utcoffset = timedelta(hours=-15, minutes=39) # arbitrary, but not zero
tz = FixedOffset(utcoffset, "tz", 0)
expected = utcdatetime + utcoffset
got = datetime.fromtimestamp(timestamp, tz)
self.assertEqual(expected, got.replace(tzinfo=None))
def test_utcfromtimestamp(self):
import time
ts = time.time()
expected = time.gmtime(ts)
got = self.theclass.utcfromtimestamp(ts)
self.verify_field_equality(expected, got)
def test_insane_utcfromtimestamp(self):
# It's possible that some platform maps time_t to double,
# and that this test will fail there. This test should
# exempt such platforms (provided they return reasonable
# results!).
for insane in -1e200, 1e200:
self.assertRaises(ValueError, self.theclass.utcfromtimestamp,
insane)
def test_negative_float_utcfromtimestamp(self):
d = self.theclass.utcfromtimestamp(-1.05)
self.assertEqual(d, self.theclass(1969, 12, 31, 23, 59, 58, 950000))
def test_utcnow(self):
import time
# Call it a success if utcnow() and utcfromtimestamp() are within
# a second of each other.
tolerance = timedelta(seconds=1)
for dummy in range(3):
from_now = self.theclass.utcnow()
from_timestamp = self.theclass.utcfromtimestamp(time.time())
if abs(from_timestamp - from_now) <= tolerance:
break
# Else try again a few times.
self.assertLessEqual(abs(from_timestamp - from_now), tolerance)
def test_tzinfo_fromtimestamp(self):
import time
meth = self.theclass.fromtimestamp
ts = time.time()
# Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
base = meth(ts)
# Try with and without naming the keyword.
off42 = FixedOffset(42, "42")
another = meth(ts, off42)
again = meth(ts, tz=off42)
self.assertIs(another.tzinfo, again.tzinfo)
self.assertEqual(another.utcoffset(), timedelta(minutes=42))
# Bad argument with and w/o naming the keyword.
self.assertRaises(TypeError, meth, ts, 16)
self.assertRaises(TypeError, meth, ts, tzinfo=16)
# Bad keyword name.
self.assertRaises(TypeError, meth, ts, tinfo=off42)
# Too many args.
self.assertRaises(TypeError, meth, ts, off42, off42)
# Too few args.
self.assertRaises(TypeError, meth)
# Try to make sure tz= actually does some conversion.
timestamp = 1000000000
utcdatetime = datetime.utcfromtimestamp(timestamp)
# In POSIX (epoch 1970), that's 2001-09-09 01:46:40 UTC, give or take.
# But on some flavor of Mac, it's nowhere near that. So we can't have
# any idea here what time that actually is, we can only test that
# relative changes match.
utcoffset = timedelta(hours=-15, minutes=39) # arbitrary, but not zero
tz = FixedOffset(utcoffset, "tz", 0)
expected = utcdatetime + utcoffset
got = datetime.fromtimestamp(timestamp, tz)
self.assertEqual(expected, got.replace(tzinfo=None))
def to_internal_value(self, value):
from datetime import datetime
from pytz import utc
try:
return datetime.utcfromtimestamp(float(value)).replace(tzinfo=utc)
except ValueError:
self.fail('invalid', format='Unix Epoch Timestamp')
def parse_date_last_updated(request):
date_last_updated_raw = request.query_params.get('since', None)
if date_last_updated_raw:
try:
from pytz import utc
from datetime import datetime
return datetime.utcfromtimestamp(float(date_last_updated_raw)).replace(tzinfo=utc)
except ValueError:
print('Value error')
pass
return None
def test_utcfromtimestamp(self):
import time
ts = time.time()
expected = time.gmtime(ts)
got = self.theclass.utcfromtimestamp(ts)
self.verify_field_equality(expected, got)
def test_insane_utcfromtimestamp(self):
# It's possible that some platform maps time_t to double,
# and that this test will fail there. This test should
# exempt such platforms (provided they return reasonable
# results!).
for insane in -1e200, 1e200:
self.assertRaises(ValueError, self.theclass.utcfromtimestamp,
insane)
def test_negative_float_utcfromtimestamp(self):
d = self.theclass.utcfromtimestamp(-1.05)
self.assertEqual(d, self.theclass(1969, 12, 31, 23, 59, 58, 950000))
def test_utcnow(self):
import time
# Call it a success if utcnow() and utcfromtimestamp() are within
# a second of each other.
tolerance = timedelta(seconds=1)
for dummy in range(3):
from_now = self.theclass.utcnow()
from_timestamp = self.theclass.utcfromtimestamp(time.time())
if abs(from_timestamp - from_now) <= tolerance:
break
# Else try again a few times.
self.assertLessEqual(abs(from_timestamp - from_now), tolerance)
def test_tzinfo_fromtimestamp(self):
import time
meth = self.theclass.fromtimestamp
ts = time.time()
# Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
base = meth(ts)
# Try with and without naming the keyword.
off42 = FixedOffset(42, "42")
another = meth(ts, off42)
again = meth(ts, tz=off42)
self.assertIs(another.tzinfo, again.tzinfo)
self.assertEqual(another.utcoffset(), timedelta(minutes=42))
# Bad argument with and w/o naming the keyword.
self.assertRaises(TypeError, meth, ts, 16)
self.assertRaises(TypeError, meth, ts, tzinfo=16)
# Bad keyword name.
self.assertRaises(TypeError, meth, ts, tinfo=off42)
# Too many args.
self.assertRaises(TypeError, meth, ts, off42, off42)
# Too few args.
self.assertRaises(TypeError, meth)
# Try to make sure tz= actually does some conversion.
timestamp = 1000000000
utcdatetime = datetime.utcfromtimestamp(timestamp)
# In POSIX (epoch 1970), that's 2001-09-09 01:46:40 UTC, give or take.
# But on some flavor of Mac, it's nowhere near that. So we can't have
# any idea here what time that actually is, we can only test that
# relative changes match.
utcoffset = timedelta(hours=-15, minutes=39) # arbitrary, but not zero
tz = FixedOffset(utcoffset, "tz", 0)
expected = utcdatetime + utcoffset
got = datetime.fromtimestamp(timestamp, tz)
self.assertEqual(expected, got.replace(tzinfo=None))
def test_utcfromtimestamp(self):
import time
ts = time.time()
expected = time.gmtime(ts)
got = self.theclass.utcfromtimestamp(ts)
self.verify_field_equality(expected, got)
def test_insane_utcfromtimestamp(self):
# It's possible that some platform maps time_t to double,
# and that this test will fail there. This test should
# exempt such platforms (provided they return reasonable
# results!).
for insane in -1e200, 1e200:
self.assertRaises(ValueError, self.theclass.utcfromtimestamp,
insane)
def test_negative_float_utcfromtimestamp(self):
d = self.theclass.utcfromtimestamp(-1.05)
self.assertEqual(d, self.theclass(1969, 12, 31, 23, 59, 58, 950000))
def test_utcnow(self):
import time
# Call it a success if utcnow() and utcfromtimestamp() are within
# a second of each other.
tolerance = timedelta(seconds=1)
for dummy in range(3):
from_now = self.theclass.utcnow()
from_timestamp = self.theclass.utcfromtimestamp(time.time())
if abs(from_timestamp - from_now) <= tolerance:
break
# Else try again a few times.
self.assertTrue(abs(from_timestamp - from_now) <= tolerance)
def test_tzinfo_fromtimestamp(self):
import time
meth = self.theclass.fromtimestamp
ts = time.time()
# Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
base = meth(ts)
# Try with and without naming the keyword.
off42 = FixedOffset(42, "42")
another = meth(ts, off42)
again = meth(ts, tz=off42)
self.assertTrue(another.tzinfo is again.tzinfo)
self.assertEqual(another.utcoffset(), timedelta(minutes=42))
# Bad argument with and w/o naming the keyword.
self.assertRaises(TypeError, meth, ts, 16)
self.assertRaises(TypeError, meth, ts, tzinfo=16)
# Bad keyword name.
self.assertRaises(TypeError, meth, ts, tinfo=off42)
# Too many args.
self.assertRaises(TypeError, meth, ts, off42, off42)
# Too few args.
self.assertRaises(TypeError, meth)
# Try to make sure tz= actually does some conversion.
timestamp = 1000000000
utcdatetime = datetime.utcfromtimestamp(timestamp)
# In POSIX (epoch 1970), that's 2001-09-09 01:46:40 UTC, give or take.
# But on some flavor of Mac, it's nowhere near that. So we can't have
# any idea here what time that actually is, we can only test that
# relative changes match.
utcoffset = timedelta(hours=-15, minutes=39) # arbitrary, but not zero
tz = FixedOffset(utcoffset, "tz", 0)
expected = utcdatetime + utcoffset
got = datetime.fromtimestamp(timestamp, tz)
self.assertEqual(expected, got.replace(tzinfo=None))
def process_response(self, request, response):
if not self.internal and request.facebook.session_key and request.facebook.uid:
request.session['facebook_session_key'] = request.facebook.session_key
request.session['facebook_user_id'] = request.facebook.uid
if request.facebook.session_key_expires:
expiry = datetime.datetime.fromtimestamp(request.facebook.session_key_expires)
request.session.set_expiry(expiry)
try:
fb = request.facebook
except:
return response
if not fb.is_session_from_cookie:
# Make sure the browser accepts our session cookies inside an Iframe
response['P3P'] = 'CP="NOI DSP COR NID ADMa OPTa OUR NOR"'
fb_cookies = {
'expires': fb.session_key_expires,
'session_key': fb.session_key,
'user': fb.uid,
}
expire_time = None
if fb.session_key_expires:
expire_time = datetime.utcfromtimestamp(fb.session_key_expires)
for k in fb_cookies:
response.set_cookie(self.api_key + '_' + k, fb_cookies[k], expires=expire_time)
response.set_cookie(self.api_key , fb._hash_args(fb_cookies), expires=expire_time)
return response
def getEvents(magnitude=1.0,significance=0,product='shakemap',lastUpdate=2678000):
"""
Return a list of earthquake event urls that meet the conditions set above.
Inputs:
* magnitude: Event magnitude (OR condition with significance)
* significance: Event significance (integer score assembled from weighting magnitude, PAGER alert level, Max MMI, etc.)
* lastUpdateDelta: Only retrieve events that have been updated in the past lastUpdate minutes.
* product: Only retrieve events that have this product type associated with them.
"""
fh = urllib2.urlopen(FEEDURL)
data = fh.read()
fh.close()
jdict = json.loads(data)
eventurls = []
tnow = datetime.utcnow()
for event in jdict['features']:
eurl = event['properties']['detail']
emag = event['properties']['mag']
esig = event['properties']['sig']
etypes = event['properties']['types'].split(',')[1:-1]
eupdate = datetime.utcfromtimestamp(event['properties']['updated']/1000)
hasproduct = product in etypes
if not hasproduct:
continue
if eupdate < tnow - timedelta(seconds=60*lastUpdate):
continue
eventurls.append(eurl)
return eventurls
def getEvents(magnitude=1.0,significance=0,product='dyfi',lastUpdate=2678000):
"""
Return a list of earthquake event urls that meet the conditions set above.
Inputs:
* magnitude: Event magnitude (OR condition with significance)
* significance: Event significance (integer score assembled from weighting magnitude, PAGER alert level, Max MMI, etc.)
* lastUpdateDelta: Only retrieve events that have been updated in the past lastUpdate minutes.
* product: Only retrieve events that have this product type associated with them.
"""
fh = urllib2.urlopen(FEEDURL)
data = fh.read()
fh.close()
jdict = json.loads(data)
eventurls = []
tnow = datetime.utcnow()
for event in jdict['features']:
eurl = event['properties']['detail']
emag = event['properties']['mag']
esig = event['properties']['sig']
etypes = event['properties']['types'].split(',')[1:-1]
eupdate = datetime.utcfromtimestamp(event['properties']['updated']/1000)
hasproduct = product in etypes
if not hasproduct:
continue
if eupdate < tnow - timedelta(seconds=60*lastUpdate):
continue
eventurls.append(eurl)
return eventurls
def getEvents(magnitude=1.0,significance=0,product='origin',lastUpdate=2678000):
"""
Return a list of earthquake event urls that meet the conditions set above.
Inputs:
* magnitude: Event magnitude (OR condition with significance)
* significance: Event significance (integer score assembled from weighting magnitude, PAGER alert level, Max MMI, etc.)
* lastUpdateDelta: Only retrieve events that have been updated in the past lastUpdate minutes.
* product: Only retrieve events that have this product type associated with them.
"""
fh = urllib2.urlopen(FEEDURL)
data = fh.read()
fh.close()
jdict = json.loads(data)
eventurls = []
tnow = datetime.utcnow()
for event in jdict['features']:
eurl = event['properties']['detail']
emag = event['properties']['mag']
esig = event['properties']['sig']
etypes = event['properties']['types'].split(',')[1:-1]
eupdate = datetime.utcfromtimestamp(event['properties']['updated']/1000)
hasproduct = product in etypes
if not hasproduct:
continue
if eupdate < tnow - timedelta(seconds=60*lastUpdate):
continue
eventurls.append(eurl)
return eventurls