Once upon a time, Python had both types and classes. Types were built-in objects defined in C; classes were what you built when using a class statement. The two were named differently because you couldn’t mix these; classes could not extend types. This difference was artificial, a limitation in the language implementation. Starting with Python … Read more
This also happened to me. I renamed a repository and then my virtual environment got stuck in the old path. I grepped all configuration files and could not find any reference to the old one. What finally solved the problem was to clear caches with the option File > Invalidate Caches / Restart…:
Here’s a list of things I can think of that make this dangerous, in rough order from worst to least bad: It’s likely to be confusing to someone reading or debugging your code. You won’t have gotten the right __init__ method, so you probably won’t have all of the instance variables initialized properly (or even … Read more
You need to invoke a TestLoader: if __name__ == “__main__”: suite = unittest.defaultTestLoader.loadTestsFromTestCase(Test) unittest.TextTestRunner().run(suite)
You did basically correct in trying to convert the string into bytes, but you did it the wrong way. Python doesn’t have typecasting (so what you did was not typecasting). The way to do it is to encode the text data into bytes data, which you do with the encode function: binary_data = data.encode(‘encoding’) What … Read more
In Python 3’s itertools there is a function called zip_longest. It should do the same as izip_longest from Python 2. Why the change in name? You might also notice that itertools.izip is now gone in Python 3 – that’s because in Python 3, the zip built-in function now returns an iterator, whereas in Python 2 … Read more
In strings (or Unicode objects in Python 2), \u has a special meaning, namely saying, “here comes a Unicode character specified by it’s Unicode ID”. Hence u”\u0432″ will result in the character в. The b” prefix tells you this is a sequence of 8-bit bytes, and bytes object has no Unicode characters, so the \u … Read more
You could get it straight from the index s.index[5] Or s.index.values[5] It all depends on what you consider better. I can tell you that a numpy approach will probably be faster. For example. numpy.argsort returns an array where the first element in the array is the position in the array being sorted that should be … Read more
Thanks to Eryksun the solution: Python code string1 = “my string 1” string2 = “my string 2” # create byte objects from the strings b_string1 = string1.encode(‘utf-8’) b_string2 = string2.encode(‘utf-8’) # send strings to c function my_c_function.argtypes = [ctypes.c_char_p, ctypes.char_p] my_c_function(b_string1, b_string2)
I think you use Python 3 . 1.Opening a file in binary mode is simple but subtle. The only difference from opening it in text mode is that the mode parameter contains a ‘b’ character. …….. 4.Here’s one difference, though: a binary stream object has no encoding attribute. That makes sense, right? You’re reading (or … Read more