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Showing posts with the label Optimization

Scipy Curve_fit For Two Dimensions Not Working - Object Too Deep?

I have a 2400 by 2400 array of data which looks something like this: data = [[-2.302670298082603040… Read more Scipy Curve_fit For Two Dimensions Not Working - Object Too Deep?

Can The Order Of Code Make This Program Faster?

Hi this is my first post, I am learning how to write code so technically I am a newbie. I am learni… Read more Can The Order Of Code Make This Program Faster?

Does Making Local Aliases Of Variables Speed Up List Comprehensions As It Does Loops?

Name lookups are relatively expensive in Python, so for large loops you can get a performance advan… Read more Does Making Local Aliases Of Variables Speed Up List Comprehensions As It Does Loops?

Resolving How To Give An Attribute In A Class In Python

I have the following class: class Point(object): __slots__= ('x','y','z'… Read more Resolving How To Give An Attribute In A Class In Python

Error Using L-bfgs-b In Scipy

I get some puzzling result when using the 'L-BFGS-B' method in scipy.optimize.minimize: imp… Read more Error Using L-bfgs-b In Scipy

How To Add Indicator Constraints In Pulp Python?

I have a problem that I don't know how to add indicator constraints in pulp. Can anyone help me… Read more How To Add Indicator Constraints In Pulp Python?

Improving Performance Of A Function In Python

I have a text file fo several GB with this format 0 274 593869.99 6734999.96 121.83 1, 0 273 593869… Read more Improving Performance Of A Function In Python

Should I Cache Range Results If I Reuse Them?

I'm relatively new to python, and I'm trying to optimize some code for a HackerRank problem… Read more Should I Cache Range Results If I Reuse Them?

Swapping The Dimensions Of A Numpy Array

I would like to do the following: for i in dimension1: for j in dimension2: for k in dimensio… Read more Swapping The Dimensions Of A Numpy Array

Using More Worker Processes Than There Are Cores

This example from PYMOTW gives an example of using multiprocessing.Pool() where the processes argum… Read more Using More Worker Processes Than There Are Cores

Replacing 3 Lists With 2 Generators

I want to optimize my application using generators and instead of creating 3 lists I want to use 2 … Read more Replacing 3 Lists With 2 Generators

Least Linear Squares: Scipy.optimize.curve_fit() Throws "result From Function Call Is Not A Proper Array Of Floats."

i am trying to implement an python code right now, which computes the least squared error for a mat… Read more Least Linear Squares: Scipy.optimize.curve_fit() Throws "result From Function Call Is Not A Proper Array Of Floats."

Scipy Fmin_slsqp Error "failed In Converting 8th Argument `g' Of _slsqp.slsqp To C/fortran Array"

I have seen this question or a variant asked elsewhere e.g. Scipy error using optimization module. … Read more Scipy Fmin_slsqp Error "failed In Converting 8th Argument `g' Of _slsqp.slsqp To C/fortran Array"

Efficient Partial Search Of A Trie In Python

This is a hackerrank exercise, and although the problem itself is solved, my solution is apparently… Read more Efficient Partial Search Of A Trie In Python

Several Issues With Capturing A Screen Video With Python

i have already asked a similar question on stackoverflow, but its not the same :-) I have three pro… Read more Several Issues With Capturing A Screen Video With Python

Pypy Significantly Slower Than Cpython

I've been testing a cacheing system of my making. Its purpose is to speed up a Django web appli… Read more Pypy Significantly Slower Than Cpython

Python App Engine Webapp2 Slow To Route

I have a Python App Engine application which serves about 3M requests per day. I am trying to optim… Read more Python App Engine Webapp2 Slow To Route

Parallelize (not Symmetric) Loops In Python

The following code is written in python and it works, i.e. returns the expected result. However, it… Read more Parallelize (not Symmetric) Loops In Python

Cpython String Addition Optimisation Failure Case

The Question Why, in CPython, does def add_string(n): s = '' for _ in range(n): … Read more Cpython String Addition Optimisation Failure Case

Include Only Unique Values In A Pulp Optimization Solution

This post is a related question that spun off of this question. My goal is to generate an optimal f… Read more Include Only Unique Values In A Pulp Optimization Solution