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Why does “return list.sort()” return None, not the list?
... It's interesting that if an entry is added to a list, either a.append('x'), or a.extend('x) you can't chain sort() on the end either. It has to be split into 2 lines. It would have been nicer had the methods returned the list! docs.python.org/3/tutorial/datastructures.html This same message b...
Shuffling a list of objects
...
random.shuffle should work. Here's an example, where the objects are lists:
from random import shuffle
x = [[i] for i in range(10)]
shuffle(x)
# print(x) gives [[9], [2], [7], [0], [4], [5], [3], [1], [8], [6]]
# of course your results will vary
Note that sh...
Print “hello world” every X seconds
... use to schedule your task to run every n seconds.
You need a class that extends TimerTask and override the public void run() method, which will be executed everytime you pass an instance of that class to timer.schedule() method..
Here's an example, which prints Hello World every 5 seconds: -
cla...
Pycharm does not show plot
...se
plt.show()
This command tells the system to draw the plot in Pycharm.
Example:
plt.imshow(img.reshape((28, 28)))
plt.show()
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What's the difference between “git reset” and “git checkout”?
...ring the project back to a specific commit. However, I feel they can't be exactly the same, as that would be redundant. What is the actual difference between the two? I'm a bit confused, as the svn only has svn co to revert the commit.
...
Read values into a shell variable from a pipe
...ake input from the pipe, but in using the variable in the same shell that executes the read.
– chepner
Oct 2 '13 at 17:02
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Understand convertRect:toView:, convertRect:FromView:, convertPoint:toView: and convertPoint:fromVie
...in the superview. This conversion is what those methods are doing.
Your example above is pointless (no pun intended) since it converts a point from a view to itself, so nothing will happen. You would more commonly find out where some point of a view was in relation to its superview - to test if a ...
urlencode vs rawurlencode?
...systems is important then it seems rawurlencode is the way to go. The one exception is legacy systems which expect the query string to follow form-encoding style of spaces encoded as + instead of %20 (in which case you need urlencode).
rawurlencode follows RFC 1738 prior to PHP 5.3.0 and RFC 3986 a...
Where can I find the “clamp” function in .NET?
I would like to clamp a value x to a range [a, b] :
9 Answers
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Python's json module, converts int dictionary keys to strings
...ects I guess you have a couple of choices. First you could try (try: ... except: ...) to convert any key to a number in the event of a dictionary look-up failure. Alternatively, if you add code to the other end (the serializer or generator of this JSON data) then you could have it perform a JSON...