I am writing a program to determine the expectation value, expectation of the X^2 and E(X – X_avg)^2. I have written a program like so: The dataset that I am using is: Expected: E(X) = 16 E(X^2) = 276 E(X- X_avg)^2 =20 Actual: Answer Your problem is the step 1, so I took the liberty of rewriting it: df: The
Tag: python
How to find an XML tag buried fairly deep, delete the tag if it is a match and save the XML as a string?
Say that I have the following XML and that I am using Python. I am using xml.etree.ElementTree. Is there an easy way for me to go down into the XML and also delete any text2 elements? Desired result: Answer Your sample xml is still not well formed (the opening and closing tags of the “text” children of <value> don’t match.
Remove all elements in each list of a nested list, based on first nested list
I have a following list: I want to remove 0 in a[0] and corresponding values of a[1] and [2], so the result list should be as follows: Answer itertools.compress is built for this task. Pair it with a listcomp to operate on each sublist, and force it to eagerly produce each new sublist, and you get what you want with
is these two dictonary statments are same while looping it in for loop?
I read that my_dict.keys() returns the dynamic view to iterate over the dictionary. I usually iterate the dictionary without the keys() function. So my question is, are below two code blokes are same? if not, what performance differences do these two have (which one is more optimized) Note: I usually use python version 3.7+ so if there’s any version-wise implementation
find a path to a given node in binary tree – Python
I’m stuck finding the path of the given node so I can find the right side but not the left side. For example, when I search for 5 in X=”+ * + 5 7 4 1 6″, the output is like [‘+’, ‘*’, ‘+’, ‘5’] but when I try to search for any number on the lift subtree, it gives
Set alphanumeric regex pattern not accepting certain specific symbols
I need to set in the variable some_text a pattern that identify any alphanumeric substrings (that could possibly contain symbols included, such as : , $, #, &, ?, ¿, !, ¡, |, °, , , ., (, ), ], [, }, { ), and with the possibility of containing uppercase and lowercase characters, but the only symbols that should
For loop to append list of strings to lists within nested list
[enter image description here][1]I have a dataset that is a list of 3 nested lists (called “patients”). Each nested list contains a certain amount of observations. The first nested list contains 119 observations, the second one 9 and the third list contains 6 observations. These observations are dictionaries containing some keys such as “start time” and “end time”. Now I
Create success hook with telegram-bot alert
I’m new in Dagster and try to create success hook that will send alerts through a telegram bot. Need help, please Resource: Hook: Job: Error: dagster._check.CheckError: Member of set mismatches type. Expected <class ‘dagster._core.definitions.hook_definition.HookDefinition’>. Got <function success_hook at 0x00000284AC2BB250> of type <class ‘function’>. UPDATE: Job: Hook: New Error: TypeError: telegram_resource..TelegramConnection.send_message() takes 1 positional argument but 2 were given Stack Trace:
How do I change the image of a button when it’s clicked in pygame?
I have a button class and I can’t figure out how to change the image to a different one to make the button look like it’s been clicked. I’ve tried changing the button image to a different image from the file after “action” is true, which happens once the button is clicked. Answer You need to load 2 images and
How to extract RSS links from website with Python
I am trying to extract all RSS feed links from some websites. Ofc if RSS exists. These are some website links that have RSS, and below is list of RSS links from those websites. My approach is to extract all links, and then check if some of them has RSS in them, but that is just a first step: I