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Generate a heatmap in MatPlotLib using a scatter data set
... title, axis labels, etc. and then do the normal savefig() like I would do for any other typical matplotlib plot.
– gotgenes
Jul 15 '11 at 19:19
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How do I diff the same file between two different commits on the same branch?
... between two different commits (not contiguous) on the same branch (master for example)?
11 Answers
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Naming convention - underscore in C++ and C# variables
...name in a class field. What does the underscore mean? Is there a reference for all these special naming conventions?
19 Ans...
What is the difference between ManualResetEvent and AutoResetEvent in .NET?
...vent is a tollbooth, allowing one car to go by and automatically closing before the next one can get through.
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Python debugging tips [closed]
What are your best tips for debugging Python?
18 Answers
18
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$_POST vs. $_SERVER['REQUEST_METHOD'] == 'POST'
... request method (surprise).
$_POST contains any post data.
It's possible for a POST request to contain no POST data.
I check the request method — I actually never thought about testing the $_POST array. I check the required post fields, though. So an empty post request would give the user a lot...
How do I parse an ISO 8601-formatted date?
...gt;> dateutil.parser.isoparse('2008-09-03T20:56:35.450686Z') # RFC 3339 format
datetime.datetime(2008, 9, 3, 20, 56, 35, 450686, tzinfo=tzutc())
>>> dateutil.parser.isoparse('2008-09-03T20:56:35.450686') # ISO 8601 extended format
datetime.datetime(2008, 9, 3, 20, 56, 35, 450686)
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Python: most idiomatic way to convert None to empty string?
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I'm keeping the else, but thanks for the str(s) tip so multiple types can be handled. nice!
– Mark Harrison
Jul 1 '09 at 9:39
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Is there a math nCr function in python? [duplicate]
..., ('a', 'd'), ('b', 'c'), ('b', 'd'), ('c', 'd')]
>>> [''.join(x) for x in itertools.combinations('abcd',2)]
['ab', 'ac', 'ad', 'bc', 'bd', 'cd']
If you just need to compute the formula, use math.factorial:
import math
def nCr(n,r):
f = math.factorial
return f(n) / f(r) / f(n-r)
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How to put multiple statements in one line?
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Unfortunately, what you want is not possible with Python (which makes Python close to useless for command-line one-liner programs). Even explicit use of parentheses does not avoid the syntax exception. You can get away with a s...