Normally Python throws NameError if the variable is not defined: However, you’ve managed to stumble upon a name that already exists in Python. Because dict is the name of a built-in type in Python you are seeing what appears to be a strange error message, but in reality it is not. The type of dict is a type. All types are objects in … Read more
From the error, I infer that referenceElement is a dictionary (see repro below). A dictionary cannot be hashed and therefore cannot be used as a key to another dictionary (or itself for that matter!). You probably meant either for element in referenceElement.keys() or for element in json[‘referenceElement’].keys(). With more context on what types json and referenceElement are and what they contain, we will be … Read more
If I understand right, you want something like this: (Here I convert the values to numbers instead of strings containing numbers. You can convert them to “1” and “0”, if you really want, but I’m not sure why you’d want that.) The reason your code doesn’t work is because using [‘female’] on a column (the second ‘female’ in your w[‘female’][‘female’]) doesn’t mean “select … Read more
I’m trying to create a simple Caesar Cipher function in Python that shifts letters based on input from the user and creates a final, new string at the end. The only problem is that the final cipher text shows only the last shifted character, not an entire string with all the shifted characters. Here’s my … Read more
I’d suggest checking for an inner exception. If there isn’t one, check your logs for the exception that occurred immediately prior to this one. This isn’t a web-specific exception, I’ve also encountered it in desktop-app development. In short, what’s happening is that the thread receiving this exception is running some asynchronous code (via Invoke(), e.g.) … Read more
It seems there are already quite some questions here about relative import in python 3, but after going through many of them I still didn’t find the answer for my issue. so here is the question. I have a package shown below and I have a single line in test.py: now, I am in the … Read more
writelines expects an iterable of strings write expects a single string. line1 + “\n” + line2 merges those strings together into a single string before passing it to write. Note that if you have many lines, you may want to use “\n”.join(list_of_lines).
Is there a way to get npm to unbuild all the modules under node_modules? Something like npm rebuild that removes all build artifacts but doesn’t rebuild them?
A dangling pointer is a pointer that points to invalid data or to data which is not valid anymore, for example: This can occur even in stack allocated objects: The pointer returned by c_str may become invalid if the string is modified afterwards or destroyed. In your example you don’t seem to modify it, but since it’s … Read more
When running the code in IDLE gives the following error: CODE:-