Re: Relatively prime integers in NumPy

On 2024-07-08 19:09:45 +, Popov, Dmitry Yu via Python-list wrote: > Does NumPy provide a simple mechanism to identify relatively prime > integers, i.e. integers which don't have a common factor other than +1 > or -1? Typing "numpy gcd" into my favourite search engine brings me to https://nump

Re: Best use of "open" context manager

Or like below, although pylint complains about this: "consider using with". Less indentation this way. f = None try: f = open(FILENAME) records = f.readlines() except Exception: sys.exit(1) finally: if f is not None: f.close() -- https://mai

Re: Relatively prime integers in NumPy

Thank you for your interest. My explanation is too concise indeed, sorry. So far, I have used Python code with three enclosed 'for' loops for this purpose which is pretty time consuming. I'm trying to develop a NumPy based code to make this procedure faster. This routine is kind of 'heart' of th

Re: Password Hash Validation (Posting On Python-List Prohibited)

On Fri, 21 Jun 2024 06:32:58 - (UTC), I wrote: > On Fri, 21 Jun 2024 03:40:55 - (UTC), I wrote: > >> I think I will create my own wrapper using ctypes. > > Done . The repo now includes an example script that exercises the various functions of the module

Re: Relatively prime integers in NumPy

Thank you very much, Oscar. Using the following code looks like a much better solution than my current Python code indeed. np.gcd.reduce(np.transpose(a)) or np.gcd.reduce(a,1) The next question is how I can generate ndarray of h,k,l indices. This can be easily done from a Python list by using

RE: Relatively prime integers in NumPy

Dmitry, I clearly did not understand what you wanted earlier as you had not made clear that in your example, you already had progressed to some level where you had the data and were now doing a second step. So, I hesitate to say much until either nobody else addressed the issue (as clearly s

Re: Relatively prime integers in NumPy

Thank you very much. List comprehensions make code much more concise indeed. Do list comprehensions also improve the speed of calculations? From: avi.e.gr...@gmail.com Sent: Friday, July 12, 2024 6:57 PM To: Popov, Dmitry Yu ; 'Popov, Dmitry Yu via Python-list' ;

RE: Relatively prime integers in NumPy

Dmitry, Efficiency of several kinds is hotly debated and sometimes it depends a lot on what is done within loops. Many suggest a mild speed up of some comprehensions over loops but the loops are not gone but somewhat hidden and perhaps some aspects are faster for having been written in C