I have a nested JSON dict that I need to convert to spark dataframe. This JSON dict is present in a dataframe column. I have been trying to parse the dict present in dataframe column using “from_json” and “get_json_object”, but have been unable to read the data. Here’s the smalle…
Convert a list of objects to a dictionary of lists
I have a list of JSON objects, already sorted (by time let’s say). Each JSON object has type and status. For example: I’d like to convert it to: So of course it’s an easy task but I’m looking for the Pythonic way doing that, so it will spare me a few lines of code Answer I don’t …
Pytest: How to locate a FutureWarning and fix it?
In my current project when I run my tests (with pytest) I get this output (besides others): This FutureWarning is quite clear – from version 1.0 (I’m using 0.24 at the moment) there will be change to some parameters and I will not be able to pass standardize as positional arguments. But the questi…
How to set arbitrary size array in ctypes?
So I have a function imported from a .dll library that takes in a pointer to a struct of the form: The idea of function is that if A is NULL, then function(D*) will update A with the size of the required buffer. Hence, if on the other hand B is an array of size A, then function(D*) will return
How to use recursion to give the minimum integer in a list using python?
I am trying to write a recursive function called my_minimum that receives a list of integers as parameter and returns the minimum stored in the list. I am able to get the user to input integers separated by a space. However, it gives me a number totally unrelated to what I am trying to achieve. For example if…
How do I read the following lines of code?
Apologies for the basic question as I am quite new to the topic. Can you please break the code above in the format given below: Answer I think it is better for you to look up the following subjects: List comprehensions – link zip() function – link This will give you a better understanding of what …
Cannot get L1 ratio in LogisticRegressionCV object
I am trying to fit an elastic net model using LogisticRegressionCV. I want to see what L1 ratio LogisticRegressionCV chooses after cross validation. I read from its documentation that after fitting we can access it by its attribute l1_ratio_. But when I tried this, it failed. The code is: It returns : Attribu…
redirecting screen output from python logging to a file
How can I redirect the output of python logging statements to a file at run time using redirection? I am using python 3.7 in Debian. When I redirect the output from a python script containing a print statement to a file, I get the expected result – a file containing the output. If I use logging.debug to…
pandas .diff() but use first cell as difference between last cell in prior column
say that i have a df in the following format: and i would like to get the difference of the 2020 column by using df[‘delta’] = df[‘2020’].diff() this will obviously return NaN for the first value in the column. how can i make it so that it automatically interprets that diff as the diff…
Pandas merge indexing not behaving as expected
I am trying to perform an anti-join in effectively one line. However, my one line solution is not giving me the same results that a receive when breaking up the code into two lines (which behaves as expected). Specifically, the single-line solution results in a dataframe with fewer rows. The goal of my anti-j…