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type object 'datetime.datetime' has no attribute 'datetime'
...
>>> import datetime
>>> datetime
<module 'datetime' from '/usr/lib/python2.6/lib-dynload/datetime.so'>
>>> datetime.datetime(2001,5,1)
datetime.datetime(2001, 5, 1, 0, 0)
But, if you import datetime.datetime:
>>> from datetime import datetime
>>&g...
What is this crazy C++11 syntax ==> struct : bar {} foo {};?
...{} foo;
Getting close.
Now, what if this anonymous UDT were to derive from some base?
struct bar {}; // base UDT
struct : bar {} foo; // anonymous derived UDT, and instance thereof
Finally, C++11 introduces extended initialisers, such that we can do confusing things like this:
int x...
In git how is fetch different than pull and how is merge different than rebase?
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fetch vs pull
fetch will download any changes from the remote* branch, updating your repository data, but leaving your local* branch unchanged.
pull will perform a fetch and additionally merge the changes into your local branch.
What's the difference? pull updates you ...
How to sort objects by multiple keys in Python?
...egated column need not be a number.
def multikeysort(items, columns):
from operator import itemgetter
comparers = [((itemgetter(col[1:].strip()), -1) if col.startswith('-') else
(itemgetter(col.strip()), 1)) for col in columns]
def comparer(left, right):
for fn...
How does collections.defaultdict work?
...igure out what this method means. Can somebody help? Here are two examples from the python docs
15 Answers
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Why is XOR the default way to combine hashes?
...
answering to the exercise: from the 16 possible different a XXX b operations (0, a & b, a > b, a, a < b, b, a % b, a | b, !a & !b, a == b, !b, a >= b, !a, a <= b, !a | !b, 1), the following have 50%-50% distributions of 0s and 1s, a...
Highlight the difference between two strings in PHP
...
From the new web site: "Update: the inline renderer is now a native part of the Text_Diff PEAR package. You don't need to use the hack presented here anymore." So just use Text_Diff now.
– Mat
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Further understanding setRetainInstance(true)
...cause it does have some useful information, but sadly none of it is linked from setRetainInstance(). From the page about fragments
Note: Each fragment requires a unique identifier that the system can
use to restore the fragment if the activity is restarted (and which
you can use to capture t...
What is the difference between atan and atan2 in C++?
...ng the arctangent of all four quadrants. std::atan only allows calculating from quadrants 1 and 4.
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I want to get Year, Month, Day, etc from Java Date to compare with Gregorian Calendar date in Java.
...ocalDate.getDayOfMonth();
Note that getMonthValue() returns an int value from 1 to 12.
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