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Asking the user for input until they give a valid response

...logic. while True: data = input("Please enter a loud message (must be all caps): ") if not data.isupper(): print("Sorry, your response was not loud enough.") continue else: #we're happy with the value given. #we're ready to exit the loop. break w...
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Reset C int array to zero : the fastest way?

... long long int or unsigned long long int, what is the fastest way to reset all its content to zero (not only for initialization but to reset the content several times in my program)? Maybe with memset? ...
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How to make a chain of function decorators?

...her object scream = shout # Notice we don't use parentheses: we are not calling the function, # we are putting the function "shout" into the variable "scream". # It means you can then call "shout" from "scream": print(scream()) # outputs : 'Yes!' # More than that, it means you can remove the old...
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Difference between a theta join, equijoin and natural join

... A theta join allows for arbitrary comparison relationships (such as ≥). An equijoin is a theta join using the equality operator. A natural join is an equijoin on attributes that have the same name in each relationship. Additionally,...
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Inverse dictionary lookup in Python

...o guarantee that it returns a single value and it does not need to be lexically first only that it be the first match and that it's behavior is stable (multiple calls on same dict over time should yield same matching element). Unless dictionaries rearrange their unmodified hashes over time as other...
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Using python's eval() vs. ast.literal_eval()?

... datamap = eval(raw_input('Provide some data here: ')) means that you actually evaluate the code before you deem it to be unsafe or not. It evaluates the code as soon as the function is called. See also the dangers of eval. ast.literal_eval raises an exception if the input isn't a valid Python dat...
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How to get a complete list of object's methods and attributes?

...butes, the short answer is: no. The problem is that the attributes are actually defined as the arguments accepted by the getattr built-in function. As the user can reimplement __getattr__, suddenly allowing any kind of attribute, there is no possible generic way to generate that list. The dir functi...
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What is the difference between a static and a non-static initialization code block

...own, just like simple variable initializers) when the class is loaded (actually, when it's resolved, but that's a technicality). Instance initializers are executed in the order defined when the class is instantiated, immediately before the constructor code is executed, immediately after the invocat...
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Twig for loop for arrays with keys

... Not the answer you're looking for? Browse other questions tagged php arrays loops twig or ask your own question.
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Is False == 0 and True == 1 an implementation detail or is it guaranteed by the language?

.....] Boolean values behave like the values 0 and 1, respectively, in almost all contexts, the exception being that when converted to a string, the strings "False" or "True" are returned, respectively. There is also, for Python 2: In numeric contexts (for example when used as the argument to an ...