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matplotlib does not show my drawings although I call pyplot.show()
... in directory ~/.matplotlib/. In this case, the following code shows where it is:
>>> import matplotlib
>>> matplotlib.matplotlib_fname()
In [1]: import matplotlib.pyplot as p
In [2]: p.plot(range(20),range(20))
Out[2]: [<matplotlib.lines.Line2D object at 0xa64932c>]
I...
List of lists changes reflected across sublists unexpectedly
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When you write [x]*3 you get, essentially, the list [x, x, x]. That is, a list with 3 references to the same x. When you then modify this single x it is visible via all three references to it:
x = [1] * 4
l = [x] * 3
print(f"id(x): {id...
Parsing CSV files in C#, with header
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Let a library handle all the nitty-gritty details for you! :-)
Check out FileHelpers and stay DRY - Don't Repeat Yourself - no need to re-invent the wheel a gazillionth time....
You basically just need to define that shape of your data - the fields in y...
LogCat message: The Google Play services resources were not found. Check your project configuration
...lay-services_lib library project to my workspace and added a reference to it from my application project, following the instructions on these pages:
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Django CSRF check failing with an Ajax POST request
I could use some help complying with Django's CSRF protection mechanism via my AJAX post. I've followed the directions here:
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Limit a stream by a predicate
Is there a Java 8 stream operation that limits a (potentially infinite) Stream until the first element fails to match a predicate?
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“Inner exception” (with traceback) in Python?
...rogramming in Python. When an exception is thrown I typically want to wrap it in another exception that adds more information, while still showing the full stack trace. It's quite easy in C#, but how do I do it in Python?
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HTML code for an apostrophe
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If you are looking for single quote, it is
&#39;
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What is a vertical tab?
...speed up printer vertical movement. Some printers used special tab belts with various tab spots. This helped align content on forms. VT to header space, fill in header, VT to body area, fill in lines, VT to form footer. Generally it was coded in the program as a character constant. From the keyb...
Regex: Remove lines containing “help”, etc
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This is also possible with Notepad++:
Go to the search menu, Ctrl + F, and open the Mark tab.
Check Bookmark line (if there is no Mark tab update to the current version).
Enter your search term and click Mark All
All lines containing the search...