I have a 14MB Excel file with five worksheets that I’m reading into a Pandas dataframe, and although the code below works, it takes 9 minutes! Does anyone have suggestions for speeding it up? Answer As others have suggested, csv reading is faster. So if you are on windows and have Excel, you could call …
Tag: python
Python default logger disabled
For some reason, in a Python application I am trying to modify, the logger is not logging anything. I traced the error to logging/__init__.py I am not sure why, but self.disabled is True. Nowhere in the application this value is set and I don’t think any of the packages is changing it. The logger is ins…
How to get last group in Pandas’ groupBy?
I wish to get the last group of my group by: but that gives the error: KeyError: -1 Using get_group is useless as I don’t know the last group’s value (unless there’s a specific way to get that value?). Also I might want to get the last 2 groups, etc How do I do this? Answer You can call last
How to turn a list/tuple into a space separated string in python using a single line?
I tried doing: but it says str object is not callable. Is this doable using a single line? Answer Use string join() method. List: Tuple: Non-string objects:
How to convert from decimal to a binary string?
The goal of this part of the lab is to motivate a right-to-left conversion of decimal numbers into binary form. Thus, you will end up writing a function numToBinary(anInteger) that works as follows: The code I have is: But this returns the string from left to right. Can anyone help me find a way to go from th…
Resize QMainWindow to minimal size after content of layout changes
I’m using a subclass of QMainWindow, in which I declared a central widget. This widget contains, among other things, a QGridLayout, which holds a set of buttons. The amount of buttons can grow or shrink, depending on the user’s input. The spacing is set to zero, so that all buttons are clumped tog…
Django: How to apply conditional attribute to HTML element in template?
I have a checkbox in my Django jinja template. I want that checkbox to be checked if object boolean field is True. My html element looks like: The problem is, checkbox is still checked when attribute checked=”False”, it’s becomes unchecked only when the checked attribute is not there. So wha…
Transient input window
I have a system, where there is a popup window that requests input from the user, and then returns that input to the main body of code for processing. I have the window popping up correctly, using transient to ensure it stays ontop, however I cannot find a way to make the window return data to the place it wa…
Python and RabbitMQ – Best way to listen to consume events from multiple channels?
I have two, separate RabbitMQ instances. I’m trying to find the best way to listen to events from both. For example, I can consume events on one with the following: I have a second host, “host2”, that I’d like to listen to as well. I thought about creating two separate threads to do th…
unregister or register models conditionally in django admin
Is it possible to conditionally register or unregister models in django admin? I want some models to appear in django admin, only if request satisfies some conditions. In my specific case I only need to check if the logged in user belongs to a particular group, and not show the model if the user (even if supe…