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How do you use the ellipsis slicing syntax in Python?
... item):
... if item is Ellipsis:
... return "Returning all items"
... else:
... return "return %r items" % item
...
>>> x = TestEllipsis()
>>> print x[2]
return 2 items
>>> print x[...]
Returning all items
Of course, there is the ...
Creating a blocking Queue in .NET?
...threads reading from the same queue. If the queue reaches a specific size all threads that are filling the queue will be blocked on add until an item is removed from the queue.
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Print current call stack from a method in Python code
In Python, how can I print the current call stack from within a method (for debugging purposes).
7 Answers
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Difference between os.getenv and os.environ.get
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@PreslavRachev minimal or not it is an extra function call, so there is some overhead. That being said, you probably don't need to retrieve env variables in the middle of your inner loop.
– pmav99
Feb 24 '19 at 14:08
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No module named _sqlite3
...opriate .so file. You can correct this problem with the steps below:
Install sqlite-devel (or libsqlite3-dev on some Debian-based systems)
Re-configure and re-compiled Python with ./configure --enable-loadable-sqlite-extensions && make && sudo make install
Note
The sudo make i...
iOS: Compare two dates
... I've found problems using compare & isEqualToDate. Sure, it may be an extra 2 lines of code, but it's more reliable.
– Coach Roebuck
Jul 25 '15 at 17:04
add a comment
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When to use Mockito.verify()?
...on your @Service - it delegates all calls to the @Service (and making some extra error handling). In this case calling to Mockito.verify() is essential, you shouldn't duplicate all of your checks that you did for the @Serive, verifying that you're calling to @Service with correct parammeter list is ...
“The Controls collection cannot be modified because the control contains code blocks”
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Or better, use a placeholder so no extra html code is output.
– Chris Haines
Sep 13 '13 at 11:13
1
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How to set child process' environment variable in Makefile
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I have GNU make 3.81, and all: <\n\t>export PROJ_ROOT=$(CURDIR)<\n\t>echo $(PROJ_ROOT)<\n> outputs the correct expansion for the first row, but only echo for the second one. PROJ_ROOT is not set after running make. Spaces around = gi...
Checking images for similarity with OpenCV
...he same image was passed twice, 0% would be returned if the images were totally different.
4 Answers
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