If you run Come out like this or It comes out like this What I want is that the elements except abc1 are inserted as ff and a randomly selected value is output. For example Answer Given your desired output, you are looking to create new dictionaries, not string representations of dictionaries, so this will do…
SQLite fetch until
I have a question about SQL. I have the following sample table called Records: record_id subject start_timestamp end_timestamp interval 2 Start Product 2 2021-04-21T16:22:39 2021-04-21T16:23:40 0.97 3 error 1 2021-04-21T16:25:44 2021-04-21T16:25:54 10.0 4 End Product 2 2021-04-21T16:30:13 2021-04-21T16:30:14 …
I don’t understand why my loop is missing numbers
Output shows that the numbers 13 is misplaced and 19 is completely missing, I apologize in advance for the inadequateness of the post, my first question here. Answer The problem is: you use print(f”{name.title()} favorite number is {number}.n”) and number use the number in the previous one. change…
Python `collections.defaultdict` for the same class
I try to use a Trie data structure for some coding problem. For each node in a trie, you typically put a a list of reference of its children. So, I thought about using defaultdict to create a default empty trie node if some children does not exists in a lookup. However, I don’t know how to use defaultdi…
how to fill in null values in Pyspark
I have a df that will join calendar date df, Next Step: I am populating dates range of first and last date. Step2: let’s say this is the calendar df that has id, and calendar dates and i want to join with calendar dates I would like to fill in those all null values based on the first non null
Test for First Occurrence of Conditions in Python Dataframe
Background Pretty new to Python and dataframes. I’m on a Mac (Sierra) running Jupyter Notebook in Firefox (87.0). I’ve got a dataframe like this: I want to add a Boolean column to this dataframe that checks whether a) the price in this row is zero and b) if it’s the first occurrence of a zer…
How to return empty queryset from serializer.data Django Rest Framework
view.py serializer.py I want the serializer to return an empty response when no User DoesNotExist in the User Model, however I get the following error. How can i achieve this? Answer You are trying to serialize a queryset, so you need to add many=True to the serialization.
Why did my code (that was supposed to put in column headers) wipe the whole Excel sheet blank with no headers?
I wrote this simple program for writing column headers to empty cells above a data table in a pre-existing Excel .xlsx file. I don’t get any errors when I run this, but when I open the file (with a single sheet), the whole table is gone and it’s blank; there’s not even any of the headers tha…
Deploy python script on Synology NAS server
I’m considering a suggestion to buy a Synology NAS server DiskStation DS720+: https://www.synology.com/de-de/products/DS720+#specs to run my python scripts or deploy web apps. I am currently using heroku free account to deploy a web app. I can’t explain, why my web app delivers wrong output on her…
How to add a row for subtotal from each group and then a final row of grand total of entries
I have the following dataframe: Location Student Name D Amy D Raj E Mitch F Poo F Mack I am trying to generate the following dataframe: Location Student Name D Amy D Raj Total Students at D 2 E Mitch Total Students at E 1 F Poo F Mack Total Students at F 2 Grand Total 5 How do I