¡@
python Programming Glossary: fasterUsing numpy to build an array of all combinations of two arrays http://stackoverflow.com/questions/1208118/using-numpy-to-build-an-array-of-all-combinations-of-two-arrays question Here's a pure numpy implementation. It's ca. 5 faster than using itertools. import numpy as np def cartesian arrays..
Python List Comprehension Vs. Map http://stackoverflow.com/questions/1247486/python-list-comprehension-vs-map share improve this question map may be microscopically faster in some cases when you're NOT making a lambda for the purpose.. in map and a listcomp . List comprehensions may be faster in other cases and most not all pythonistas consider them more..
Should you always favor xrange() over range()? http://stackoverflow.com/questions/135041/should-you-always-favor-xrange-over-range code more portable going forward. range can actually be faster in some cases eg. if iterating over the same sequence multiple..
“Large data” work flows using pandas http://stackoverflow.com/questions/14262433/large-data-work-flows-using-pandas indexes on certain data columns makes row subsetting much faster . enable compression. Let me know when you have questions ..
http://stackoverflow.com/questions/1650591/whether-to-use-set-names results in a MySQL API call it should be considered much faster than issuing a query. In respect of performance the fastest..
Why is numpy's einsum faster than numpy's built in functions? http://stackoverflow.com/questions/18365073/why-is-numpys-einsum-faster-than-numpys-built-in-functions is numpy's einsum faster than numpy's built in functions Lets start with three arrays.. as it calls DGEMM from a BLAS library. So why is np.einsum faster that other numpy functions that are equivalent The DGEMM case..
Fastest way to list all primes below N in python http://stackoverflow.com/questions/2068372/fastest-way-to-list-all-primes-below-n-in-python .timeit 1 1.1499958793645562 Can it be made even faster EDIT This code has a flaw Since numbers is an unordered set..
How to implement an efficient infinite generator of prime numbers in Python? http://stackoverflow.com/questions/2211990/how-to-implement-an-efficient-infinite-generator-of-prime-numbers-in-python
Python - Is a dictionary slow to find frequency of each character? http://stackoverflow.com/questions/2522152/python-is-a-dictionary-slow-to-find-frequency-of-each-character ch for word in fileinput.input for ch in word.rstrip # faster 0.4s but less flexible chars open filename .read print textwrap.fill..
Best way to strip punctuation from a string in Python http://stackoverflow.com/questions/265960/best-way-to-strip-punctuation-from-a-string-in-python s ''.join ch for ch in s if ch not in exclude This is faster than s.replace with each char but won't perform as well as non..
How do I check if a string is a number in Python? http://stackoverflow.com/questions/354038/how-do-i-check-if-a-string-is-a-number-in-python and slower. I'm not sure that anything much could be faster than the above. It calls the function and returns. Try Catch..
How to know if an object has an attribute in Python http://stackoverflow.com/questions/610883/how-to-know-if-an-object-has-an-attribute-in-python or trap it with a try except block. This will likely be faster than hasattr . If the property is likely to not be there most.. the time or you're not sure using hasattr will probably be faster than repeatedly falling into an exception block. share improve..
Python: simple list merging based on intersections http://stackoverflow.com/questions/9110837/python-simple-list-merging-based-on-intersections code given by Niklas Baumstark below showed to be a bit faster for the simple cases. Not tested the method given by Hooked.. large code as a module. Simply for now Niklas 's method is faster and the answer for simple sets is correct of course. However..
Why is reading lines from stdin much slower in C++ than Python? http://stackoverflow.com/questions/9371238/why-is-reading-lines-from-stdin-much-slower-in-c-than-python my original while loop above results in code that runs faster than Python. New performance comparison this is on my 2011 Macbook.. As suggested by Gandalf The Gray below gets is even faster than scanf or the unsynchronized cin approach. I also learned..
Making a flat list out of list of lists in Python [duplicate] http://stackoverflow.com/questions/952914/making-a-flat-list-out-of-list-of-lists-in-python question item for sublist in l for item in sublist is faster than the shortcuts posted so far. For evidence as always you..
|