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Tag: python

Python Tuples: remove the first three elements cleanly

My issues: How is (9,) different from (9)? (9,)==(9) yields False Why is (9,) showing up in the snippet below? How do I fix the code below so I get (9)? Answer The simple answer is, parentheses are overloaded for grouping and for tuples. To differentiate these forms in python, a trailing comma explicitly indi…

Iteratively apply a function to an array

I want to create an array that contains g^0, g^1, g^2…. up to g^100 but all to mod50 (apologies if anyone knows how to format this so the powers are properly aligned I need a bit of help!) In my case g = 23, so I would want an array that looks like: I’ve included all my (incorrect) code at

Get context data from Lambda Authorizer (APi Gateway)

I’m using the Aws Lambda authorizer to secure an Api gateway. The authorizer lambda function is written in python using this blueprint from aws (https://github.com/awslabs/aws-apigateway-lambda-authorizer-blueprints/blob/master/blueprints/python/api-gateway-authorizer-python.py) I added this code in the…

Django How to link a foreign key to many tables

I have n classes and each class contains a column called key like this (where n==3) I want to make the column key as Foreign key between all the n classes? I know how make a foreign key between 2 classes but I want to do that with many classes because I have about 40 classes and some classes has

cryptography.fernet.InvalidToken problem with cryptography

Getting this error when trying to run this: FYI dk variable is defined with key (default key) Edit: I added the key for those who asked Answer I have found out, through trial and error with the same project later down the line, that you need to turn your key into something like this key = b’niwaXsYbDiAx…

Remove data time older than specific hours

I want to remove data from my dataframe older than say 2 hours from current time starting with 00 mins (datetime column is in index) when i use below code Current datetime: ’17-03-2022 17:05:00′ Issue: My code keeps all records in df from ’17-03-2022 15:05:00′ to ’17-03-2022 17:0…

Add in-between steps into array of numbers (Python)

I am looking for some function that takes an input array of numbers and adds steps (range) between these numbers. I need to specify the length of the output’s array. Example: Result: Is there something like that, in Numpy for example? I have a prototype of this function that uses dividing input array in…