My use case is multiple optional positional arguments, taken from a constrained set of choices, with a default value that is a list containing two of those choices. I can’t change the interface, due to backwards compatibility issues. I also have to maintain compatibility with Python 3.4. Here is my code. You can see that I want my default to
Tag: python-3.4
salesforce python Beatbox import error
I am trying to log in to salesforce.com’s sandbox using a URL, ID and PASS. I want to use SOAP API for that. When I try to import beatbox in python3, it throws an ImportError exception. However, I can confirm that beatbox is installed in python3. So what am I doing wrong? Is there any other way to do it?
Python type hinting without cyclic imports
I’m trying to split my huge class into two; well, basically into the “main” class and a mixin with additional functions, like so: main.py file: mymixin.py file: Now, while this works just fine, the type hint in MyMixin.func2 of course can’t work. I can’t import main.py, because I’d get a cyclic import and without the hint, my editor (PyCharm) can’t
How is __mro__ different from other double underscore names?
I stumbled upon this behavior for double underscore name that I don’t understand: I know about the name mangling for __name, which doesn’t apply for __name__ (more for overloading operator methods). __id__ behaves just like a regular class variable which can be accessed via Class name as well as instance. However, __mro__ can only be accessed via Class name and
Pyautogui TypeError: ‘NoneType’ object is not iterable
I’m trying to use locateCenterOnScreen() function of PyAutoGUI, however it raises : My code is: How can I fix this problem? Answer From the documentation of Pyautogui here, the method locateCenterOnScreen returns None when it can’t find the image on your screen. Note that you are looking for 2 results from this method, but None is just one result (since
Making a collatz program automate the boring stuff
I’m trying to write a Collatz program using the guidelines from a project found at the end of chapter 3 of Automate the Boring Stuff with Python. I’m using python 3.4.0. Following is the project outline: Write a function named collatz() that has one parameter named number. If the number is even, then collatz() should print number // 2 and
PermissionError [errno 13] when running openpyxl python script in Komodo
I am having trouble using openpyxl scripts in Komodo edit 9 and python 3.4 on Windows 7. I copied some openpyxl code to learn, but it won’t execute from Komodo. I receive a permission error 13. I checked my path and python34 is present. The same script will run when I use IDLE or Command Prompt. My Komodo command is
Python Enum, when and where to use?
Python 3.4.0 introduced enum, I’ve read the doc but still don’t know the usage of it. From my perspective, enum.Enum is an extended namedtuple type, which may not be true. So these are what I want to know about Enum: When and where to use Enum? Why do we need Enum? What are the advantages? What exactly is an Enum?