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TransactionManagementError “You can't execute queries until the end of the 'atomic' block” while usi

...nsaction.TransactionManagementError exception. Like caio mentioned in the comments, the solution is to capture your exception with transaction.atomic like: from django.db import transaction def test_constraint(self): try: # Duplicates should be prevented. with transaction.atomi...
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Foreach loop, determine which is the last iteration of the loop

... Shimmy Weitzhandler 88.9k116116 gold badges372372 silver badges585585 bronze badges answered Sep 19 '11 at 19:30 KeithSKe...
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How to open a second activity on click of button in android app

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How to parse JSON in Python?

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Java: is there a map function?

... that while with Guava you can do this, you might not want to: code.google.com/p/guava-libraries/wiki/FunctionalExplained (read the "Caveats" section). – Adam Parkin Mar 7 '13 at 22:32 ...
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What does an exclamation mark mean in the Swift language?

...d optionals should not be used when there is a possibility of a variable becoming nil at a later point. Always use a normal optional type if you need to check for a nil value during the lifetime of a variable. Update 2: The article "Interesting Swift Features" by Mike Ash gives some motivation fo...
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Find a file in python

... Comprehention list can replace the function, e.g. find_all: res = [os.path.join(root, name) for root, dirs, files in os.walk(path) if name in files] – Nir Jul 27 '19 at 14:48 ...
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Embed YouTube video - Refused to display in a frame because it set 'X-Frame-Options' to 'SAMEORIGIN'

...watch endpoint does not. <iframe width="420" height="315" src="https://www.youtube.com/embed/A6XUVjK9W4o" frameborder="0" allowfullscreen></iframe> share | improve this answer ...
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Is there a way to create a function from a string with javascript?

... luckily I added the result screenshots before it was down, when I got the comment from Bulk. – phnah May 11 '16 at 2:13 ...
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disable all form elements inside div

...th a parent div name and that's it. If given more information I could have come up with a more efficient solution. – Andrew Whitaker Sep 12 '12 at 14:22 1 ...