I’m using django 4.0 when i change the is_active to False from django admin, it doesn’t make any changes to the object, I have override the save method in models. models.py admin.py Can anyone advise ? The problem started when i added the save() in models.py Answer The .save() method should always…
Tag: python
Python DataFrame String replace accidently Returing NaN
I encounter a weird problem in Python Pandas, while I read a excel and replace a character “k”, the result gives me NaN for the rows without “K”. see below image It should return 173 on row #4，instead of NaN, but if I create a brand new excel, and type the same number. it will work. or…
Debugging PySpark udf (lambda function using datetime)
I came across- the below lambda code line in PySpark while browsing a long python Jupyter notebook, I am trying to understand this piece of line. Can you explain what it does in a best possible way? Answer udf in PySpark assigns a Python function which is run for every row of Spark df. Creates a user defined …
Hacker rank List Prepare
This is my Code and it gives me this error message. Why? Error Message – Traceback (most recent call last): File “/tmp/submission/20220617/03/45/hackerrank-3495035b4042c8bc0c55e799a2d2e687/code/Solution.py”, line 15, in l.sort() TypeError: ‘<‘ not supported between instances o…
Dataframe – Find sum of all values from dictionary column (row-wise) and then create new column for that Sum
My pyspark Dataframe which has two columns, ID and count, count column is a dict/Map<str,int>. I want to create another column which is the total of all values of count I have I want something like, Sum of all the values of count column My approach But I am getting grouped by individual Key and then agg…
Split Single Column(1,000 rows) into two smaller columns(500 each)
How to split a single column containing 1000 rows into chunk of two columns containing 500 rows per column in pandas. I have a csv file that contains a single column and I need to split this into multiple columns. Below is the format in csv. Steps I took: I had multiple csv files containing one column with 36…
Python concatenate (multiple) strings to number
I have a python list [‘a1’, ‘b1’, ‘a2’, ‘b2′,’a3’, ‘b3’]. Set m=3 and I want get this list using loops, because here m=3 could be a larger number such as m=100. Since we can have then I try to get [‘a1’, ‘b1’, R…
Load data from Flask/Python to HTML textarea
I am trying to send data from Python / Flask to an HTML form textarea but need some help. responses.html is shown below. A portion of app.py is shown below: I would like to display any previously recorded responses in the response textarea of responses.html while preserving the placeholder when no previous re…
sorting .csv file using pandas
I am using pandas.DataFrame.sort_values to sort my csv. My csv without sorting looks like . I am trying to sort my csv file by numbers in ATOM_id in ascending order. This is my code snippet df.sort_values([“ATOMS_ID”],axis = 0, ascending = [True],inplace = True). This is what I . I am not really s…
How to find a tag within the same parent that has the child I want?
Scraping a website that has multiple products on the same page, some that I don’t want to know the prices of. So I wanted to first see the product category to then get the price listed. The website code looks like this: I already know how to get to the category part with my own code, but I’m compl…