I have two list such as. First list contains some additional string in the elements but I want to find the match with or without converting it to integer from the second list. output req: Tried: Answer If you only want to compare the number part you have to do some conversion. Start with l2 is now [1, 4]. Now
Tag: list-comprehension
How to compare a value to a list of pairs in a list comprehension?
I need to create a list that is n long where each item is a Boolean. The item will only be True when x is in the range of one or more pairs of integers. For example, my current code is as follows: My issue is that the number of pairs will vary, so only a and b might exist
How to find the values of a key in a nested list of dictionaries in Python
This is my data structure. I have 3000 instances of ‘product’ within the ‘clothes list’. Each contains another list of dictionaries that stores the reviews. I am attempting to iterate through all the reviews in the dictionary and return all the reviews written by a particular username.…
How to fix list comprehension ‘bitwise_and’ error and optimize for-loop?
I have the following for loop below, but I want to make this into a more computationally efficient variant. I thought I could do that with list comprehension, but this is giving me the following error: TypeError: ufunc ‘bitwise_and’ not supported for the input types, and the inputs could not be sa…
One liner for True or False for loop in Python
Almost every time I solve an exercise of Codewars and glance at others solutions I see that some guys do my 15 lines code in 2 or 3 lines. So, I have started to learn lists and sets comprehensions and would try other tricks. For now my question is about this code: Is it possible to write it in one
how to combine three lists comprehension into one using only one for loop?
I have a list in range (1 to 31). The final list is l = [x, y, z] You can see my code, it is work fine using three for loops: The outputs is: I tried to do it using only one for loop. I got this error: I don’t know if I can do it or not. please help
Python List Comprehension to Delete Dict in List
I have a json file formatted as above and I am trying to have a function delete an entry based on the username input from a user. I want the file to then be overwritten with the entry removed. I have tried this: It partially works as everything in the Credentials section looks normal, but it appends a strange…
Getting all subitems from a list of items with list comprehension
I have a dataclass foo which has a member item_li: list[item], item is a dataclass which has a member sub_item_li: list[sub_item] I want to return list[sub_item] from a method of foo. I am primarily looking for a solution with list comprehension. I got it already working with the following list comprehension …
What is the difference between normal loops and list comprehension?
The result for line 2 is is something like: Where as the result for the normal for loop is: Why do I get the extra [None, None, None, None] in case of list comprehension? Answer A list comprehension is used to comprehend (Make) a list. It is useful only when making lists. However, here you are not making a li…
Delete columns of a nested list with list comprehension
How would I write this for loop as a list comprehention? This is the list: I want to delete row 4 and 5 I did try this but it just gives me a syntax error Any idea how to do that with a list comprehension? Answer You can slice the list upto index 3: If that is what you want.