Consider some 2d lists: How to check if there is at least one None in a 2d list? Outputs: deal with a should output a bool value False, and b should output True. I have no ideas when the list be a 2d list. Answer You can use two loops, one inside the other. This can be simplified by using
Tag: python-3.x
Column dictionary values into separate Dataframe
I have a dataframe which has a column that contains a list of dictionaries. This is what an example column value it looks like: I want to create a separate dataframe that takes the above column values for each row, and produces a dataframe where ‘category’ is a column, and the values for that colu…
ImportError: cannot import name ‘_rfc_1738_quote’ from ‘sqlalchemy.engine.url’
I am using a python snowflake connector from the following package: snowflake-sqlalchemy It used to be working but it’s now failing with this weird error. I tried to switch to older version of the package, but can’t get rid of this error. Here is the fulll stack trace: Answer Looks like this is a …
Output tensors of a Functional model must be the output of a TensorFlow `Layer`
So I’m trying to expand the Roberta Pretrained Model and I was doing a basic model for testing but I’m getting this error from TensorFlow: ValueError: Output tensors of a Functional model must be the output of a TensorFlow Layer. which is from the Model api of Keras but I don’t exactly know …
Merge using threads not working in python
I have to merge two lists and every time a full the lists in order to merge them , but what is happening that I did it like this : but what is happening that filling_buffer_thread and create_inverted_index_thread just called one time, and not working again, when I debugged the code I see that filling_buffer_t…
Testing for None on a non Optional input parameter
Let’s say I have a python module with the following function: For that function, I have the unit test that follows: Given the type hints in the function, the input parameter should always be a defined string. But type hints are… hints. Nothing prevents the user from passing whatever it wants, and …
lookup for a value in one column and return from another column’s corresponding row in pands
I know it is a fundamental question, but I couldn’t solve it. Any help will be appreciated My list1 has around 1059 values, list2 has around 7 values. I want to check values in list1 against values in list2, if matches append ‘x’ to list variable, if not matches append ‘y’ to sam…
Best regex pattern to replace input function from a separate python file
I am new to regex so please explain how you got to the answer. Anyway I want to know the best way to match input function from a separate python file. For example: match.py Now I want to match ONLY the input statement and replace it with a random number. I will do this in a separate file main.py. So
Why no colon in forming a list from loop in one line in Python?
From this website, there is a way to form a list in Python from loop in one line My question is, typically, after a loop, there is a colon, e.g., why in the one-line approach, there is no colon? Is there any underlying reason than convention? Answer Note (in addition to what have been said in comments: it is …
Why Does Python Method Needs a `self` pointer for Recursion to Work?
I’m new to Python and want to use it for LeetCode. I was doing a recursion problem and realized that I have to use self. pointer in order for the recursion to work. Here is my initial code: However, this would give me an error: I had to add a self. before reverseList() in order for it to work. I’m