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How I can I lazily read multiple JSON values from a file/stream in Python?
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20
Here's a much, much simpler solution. The secret is to try, fail, and use the information in th...
How to read a file in reverse order?
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answered Feb 20 '10 at 10:10
Matt JoinerMatt Joiner
94.2k8585 gold badges321321 silver badges483483 bronze badges
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How to sort objects by multiple keys in Python?
...ult:
return mult * result
else:
return 0
return sorted(items, cmp=comparer)
You can call it like this:
b = [{u'TOT_PTS_Misc': u'Utley, Alex', u'Total_Points': 96.0},
{u'TOT_PTS_Misc': u'Russo, Brandon', u'Total_Points': 96.0},
{u'TOT_PTS_Misc': u'...
How do you generate dynamic (parameterized) unit tests in python?
... self.assertEqual(a,b)
Which will generate the tests:
test_sequence_0_foo (__main__.TestSequence) ... ok
test_sequence_1_bar (__main__.TestSequence) ... FAIL
test_sequence_2_lee (__main__.TestSequence) ... ok
======================================================================
FAIL: test_s...
Python speed testing - Time Difference - milliseconds
...e.datetime.now()
>>> c = b - a
>>> c
datetime.timedelta(0, 4, 316543)
>>> c.days
0
>>> c.seconds
4
>>> c.microseconds
316543
Be aware that c.microseconds only returns the microseconds portion of the timedelta! For timing purposes always use c.total_sec...
Notification passes old Intent Extras
...ge this:
PendingIntent contentIntent = PendingIntent.getActivity(context, 0, notificationIntent, 0);
To:
PendingIntent contentIntent = PendingIntent.getActivity(context, UNIQUE_INT_PER_CALL, notificationIntent, 0);
intents are not created if you send the same params. They are reused.
...
What does the star operator mean, in a function call?
...(a, b, c, d):
return a + b + c + d
values1 = (1, 2)
values2 = { 'c': 10, 'd': 15 }
s = sum(*values1, **values2)
will execute as:
s = sum(1, 2, c=10, d=15)
Also see section 4.7.4 - Unpacking Argument Lists of the Python documentation.
Additionally you...
Python, Matplotlib, subplot: How to set the axis range?
How can I set the y axis range of the second subplot to e.g. [0,1000] ?
The FFT plot of my data (a column in a text file) results in a (inf.?) spike so that the actual data is not visible.
...
Combining two expressions (Expression)
...ambda = Expression.Lambda<Func<T,bool>>(body, expr1.Parameters[0]);
This also works well to negate a single operation:
static Expression<Func<T, bool>> Not<T>(
this Expression<Func<T, bool>> expr)
{
return Expression.Lambda<Func<T, bool>&...
Will strlen be calculated multiple times if used in a loop condition?
...t I personally wouldn't rely on that.
I'd do something like
for (int i = 0, n = strlen(ss); i < n; ++i)
or possibly
for (int i = 0; ss[i]; ++i)
as long as the string isn't going to change length during the iteration. If it might, then you'll need to either call strlen() each time, or handl...