Gracefully pattern for the useful class like a “Schemes by inheritance”

Imagine, we have a some files: scheme.py scheme.One.py scheme.Two.py sceme.*.py … In file scheme we have the common class code with all class attributes we need. class Scheme: _VAR = “Variable” def function_common(self): pass def function_first(self): return “Main_Scheme” def function_second(self): return “Common_Scheme” In other files we have the ONLY PARTICULAR attributes, which we want to…

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Fastest way to filter non frequent words inside lists of words

I’ve a dataset containing lists of tokens in csv format like this: song, tokens aaa,”[‘everyon’, ‘pict’, ‘becom’, ‘somebody’, ‘know’]” bbb,”[‘tak’, ‘money’, ‘tak’, ‘prid’, ‘tak’, ‘littl’]” First i want to find all the words that appears in text at least a certain amount of time, let’s say 5, and this is easily done: # converters simply…

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PHP file upload on edit form prevent update if no file

I already upload a file using form. if i trying to edit form, file location is empty. how to prevent upload if no file. if(isset($_FILES[“user_image”])) { $extension = explode(‘.’, $_FILES[‘user_image’][‘name’]); $new_name = rand() . ‘.’ . $extension[1]; $destination = ‘../upload/’ . $new_name; move_uploaded_file($_FILES[‘user_image’][‘tmp_name’], $destination); return $new_name; }

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