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Converting between datetime, Timestamp and datetime64
...tetime.utcnow()
>>> dt
datetime.datetime(2012, 12, 4, 19, 51, 25, 362455)
>>> dt64 = np.datetime64(dt)
>>> ts = (dt64 - np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
>>> ts
1354650685.3624549
>>> datetime.utcfromtimestamp(ts)
datetime.da...
Assert a function/method was not called using Mock
...t;>> mock=Mock()
>>> mock.a()
<Mock name='mock.a()' id='4349129872'>
>>> assert not mock.b.called, 'b was called and should not have been'
>>> assert not mock.a.called, 'a was called and should not have been'
Traceback (most recent call last):
File "<stdin...
mysql - how many columns is too many?
... bubakazouba
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answered Sep 24 '09 at 20:45
ChssPly76ChssPly76
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What does the line “#!/bin/sh” mean in a UNIX shell script?
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143
It's called a shebang, and tells the parent shell which interpreter should be used to execute th...
What's the fundamental difference between MFC and ATL?
...
3 Answers
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How to use XPath contains() here?
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edited Jan 31 '12 at 13:07
answered Jun 30 '09 at 17:56
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Pointers vs. values in parameters and return values
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edited Aug 26 at 3:04
answered May 8 '14 at 20:34
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What's the difference between utf8_general_ci and utf8_unicode_ci?
... thomasrutterthomasrutter
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223
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SecItemAdd and SecItemCopyMatching returns error code -34018 (errSecMissingEntitlement)
...evice from Xcode I would try to access the keychain but fail due to error -34018. This doesn't match any of the documented keychain error codes and can't be consistently reproduced. (happens maybe 30% of the time, and it's not clear to me why it happens). What makes debugging this problem very diffi...
How to JSON serialize sets?
...owing that it can handle lists, dicts, and sets:
>>> data = [1,2,3, set(['knights', 'who', 'say', 'ni']), {'key':'value'}, Decimal('3.14')]
>>> j = dumps(data, cls=PythonObjectEncoder)
>>> loads(j, object_hook=as_python_object)
[1, 2, 3, set(['knights', 'say', 'who', 'n...