How to split a numpy array in fixed size chunks with and without overlap?
Lets say I have an array:
Python
Python Weighted Random
I need to return different values based on a weighted round-robin such that 1 in 20 gets A, 1 in 20 gets B, and the rest go to C. So: A => 5% B => 5% C => 90% Here’s a basic version that appears to work: import random x = random.randint(1, 100) if x … Read more
String exact match
I have a string in which the word “LOCAL” occurs many times. I used the find() function to search for this word but it returns another word “Locally” as well. How can I match the word “local” exactly?
What does Python optimization (-O or PYTHONOPTIMIZE) do?
The docs only say that Python interpreter performs “basic optimizations”, without going into any detail. Obviously, it’s implementation dependent, but is there any way to get a feel for what type of things could be optimized, and how much run-time savings it could generate?
Subtract two columns in dataframe
My df looks as follows:
Are numpy’s basic operations vectorized, i.e. do they use SIMD operations?
I am doing some performance analysis, and i wonder, whether numpy vectorizes its standard array operations, when the datatype is known (double).
Pandas: Datetime Improperly selecting day as month from date
I’m working with some datetime data in a dataframe. It’s in a format day/month/year Ex: Date —————- 27/06/2021 00:00 27/06/2021 00:00 30/06/2021 00:00 30/06/2021 00:00 30/06/2021 00:00 18/06/2021 00:00 26/06/2021 00:00 28/06/2021 00:00 28/06/2021 00:00 27/06/2021 00:00 28/06/2021 00:00 30/06/2021 00:00 12/06/2021 00:00 28/06/2021 00:00 I want to extract the month and year, so I … Read more
What user do python scripts run as in windows?
I’m trying to have python delete some directories and I get access errors on them. I think its that the python user account doesn’t have rights? WindowsError: [Error 5] Access is denied: 'path' is what I get when I run the script. I’ve tried shutil.rmtree os.remove os.rmdir they all return the same error. Answers: Thank … Read more
Convert list of strings to dictionary
I have a list
Python Multiprocess Pool. How to exit the script when one of the worker process determines no more work needs to be done?
mp.set_start_method('spawn') total_count = Counter(0) pool = mp.Pool(initializer=init, initargs=(total_count,), processes=num_proc) pool.map(part_crack_helper, product(seed_str, repeat=4)) pool.close() pool.join() So I have a pool of worker process that does some work. It just needs to find one solution. Therefore, when one of the worker processes finds the solution, I want to stop everything. One way I thought of was just … Read more