With the following function: I’m getting this error from Pylance in Visual Studio Code: “ClassVar” is not allowed in this context I’m using Python3.9 and Pylance v2021.10.0. In this example the Email class has a “make_stub” function, which has a _not_overriden attribute set to True. Wh…
Palindrome question use of lambda and key
Hey guys so I was working on this problem on the algoExpert platform, but I am struggling to understand what longest and currentLongest are really doing. Just from the beginning, I am not entirely sure what the currentLongest = [0, 1] is doing, is it just saying that it will have 2 values? Are odd and even re…
Using eval in the middle of a python statement
I want to use eval in the middle of the following python statement: but because it does not return any value (it works in an “in place” manner), I cannot actually use it there and instead I receive an error of TypeError: can only concatenate list (not “NoneType”) to list . Is there any…
Is there a simple way to remove “padding” fields from numpy.dtype.descr?
Context Since numpy version 1.16, if you access multiple fields of a structured array, the dtype of the resulting array will have the same item size as the original one, leading to extra “padding”: The new behavior as of Numpy 1.16 leads to extra “padding” bytes at the location of unindexed fields…
If Statement depending on the contents of a .txt file – Python 3.9
Whenever I run the program, I don’t get an error message. However, when I type in what I have just set or set before as the password (in the txt file) or what is printed in the terminal, it sleeps the program like I got it wrong. I’ve posted this before and it was too long, so it’s shortened…
Python openpyxl get date output format
i have an excel file that i cant change, where im getting some info with openpyxl, on this case i have a cell with this DATE format MM/DD/YYYY i need the output on python to be: %d/%m/%Y Ive tried this : I get this error : How can i make this work correctly? (im new in python and also on
time.sleep does not work for multithreaded
I was trying to multithread the code for “Suspend / Hibernate pc with python” provided by Ronan Paixão when I find that time.sleep() does not suspend the thread that run pywin32 module. >>> Warning! The following code will put Windows to sleep <<< The print function did waited fo…
seperate array from large array in numpy by column condition
check if values of a,b are 1 ,2 and c,d are 3,4 then print it what i am currently doing is but it prints all the rows where the 1st column is 1 Answer You can slice your array and then use row equality checks: BTW, it is always a good idea to make an example that can be reproduced
How to properly reference the previous Pandas DataFrame in the next method in a method chain?
I have been trying to use method chaining in Pandas however there are a few things related to how you reference a DataFrame or its columns that keep tripping me up. For example in the code below I have filtered the dataset and then want to create a new column that sums the columns remaining after the filter. …
Add empty rows at the beginning of dataframe before export to xlsx
I have a pandas dataframe and I need to append 3 blank rows over the head of the columns before to export it to xlsx. I’m using this code based on this question: But it adds the rows at index 0 and I need the blank rows before the row with the column names in the xlsx. Is this possible