Questions tagged [generator]
A generator is a generalization of a subroutine, primarily used to simplify the writing of iterators. The yield statement in a generator does not specify a co-routine to jump to, but rather passes a value back to a parent routine.
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Is using a generator of context managers kosher?
I know this is not necessarily a problem question but more of a style question. I understand that it doesn't have to be pretty for the most part.
In general, context managers are used for mutexing, ...
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Improving efficiency of Rust algorithm ported from Python generator
I'm learning Rust by solving ProjectEuler problems.
To this end, I am trying to port a solution to problem 88 (link) in Python that heavily relies on generators to Rust (which doesn't have generators)....
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Generator for colors
The goal here is to pull an item from an array and when the array ends - to start over - and allow you to pull items infinitely as needed. We don't use PHP that much, so please let us know how we can ...
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Date range generator
An app has a feature that's much like any calendar application (like the Outlook calendar for example).
Consequently, I need to do a lot of date logic. I wrote a class with date calculation methods ...
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@lazylist - Converts a Python Generator to a List without evaluating every element
Inspired by a blog I read, I made a LazyList class that can wrap an iterable (list, generator etc.) and turn it into a ...
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Library to Help Loop with Generators
I found I need to loop through a list to create a brute force algorithm. Therefore, I decided to make a library, but to generalize the result by using a generator. There are three cases which is every ...
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The python code simulates an environment of a disease and calculates how many people get infected
The python code simulates an environment of an X number of persons with an Y number of places they can go to, puts the persons randomly in the places and calculates how many persons get infected, die ...
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Bidirectional iterate over list in Python
I wrote a short function to iterate over a list starting at a given index, then flipping back and forth between left and right values.
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Q: Paying Debt Off a Year, MIT edX 6.001 U2/PS2/P1
Write a program to calculate the credit card balance after one year if a person only pays the minimum monthly payment required by the credit card company each month.
The following variables contain ...
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Docstring generator in Google type
Hello everyone!
In this task I had to create docstring generator. I'm just wondering how you see this problem, I have to "take data" from the dictionary
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Racing promises and consuming them in the order of their resolution time
The ideas are
When multiple async calls are made, to be able to start consuming from the first resolving one regardless in what order the promises are fired.
To construct a modern emitter of async ...
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Compute the outputs of a generator in parallel
I am processing an unknown "length" of generator object.
I have to keep things "lazy" because of memory management.
The processing is compute heavy, so writing it multiproc style ...
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Iterating through a list to generate calendars
I'm iterating through a list to generate calendars, the issue is each generator function has the same this.addToCalendar() function. I'd like to know how I could ...
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Strong password generator with symbols that user definies
I've created program like in the title. Actually I know I could use regex to create pattern and then do some actions from it, but I think my code is clear enough (at least for me :P). There is a ...
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Python3: using generator to process a very large list of integers
This is from a leetcode question I am working on. The problem is the following:
create an algorithm that works in the the following fashion:
arr = [1,3,4,8], queries = [[0,1],[1,2],[0,3],[3,3]]
the ...
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Coroutine-based two-in-one properties
Over the holidays I played around with coroutines and their use as two-in-one getter and setter methods:
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A cryptarithm solver
Cryptarithms
Cryptarithms, or Verbal arithmetic, are substitution puzzles where letters represent unique digits:
S E N D
+ M O R E
=========
M O N E Y
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Cyclic generator with access to current local state and executes callback after each cycle
I'm working on a Python class that is a cyclic generator, like itertools.cycle, but it offers access to its current state and executes a callback after the ...
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Weekly Employee Report Generator PowerShell Script
Weekly Employee Report Generator PowerShell Script
Description
This script is used for generating a Markdown template file for weekly employee reports. In ...
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Generate unique random strings considering collisions
I'm coding a random strings generator. It's working, but I'm not sure if this is efficient.
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Lazy generator of strings in lexicographical order
I needed to write a Python generator that lazily generates, in lexicographical order, strings composed of a certain alphabet (e.g. lowercase English letters).
My first thought was to make an infinite ...
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Experimenting with C++20 coroutines to create Python-style generator functions
I've been playing around with the coroutines implementation in gcc 10.2.0 (Debian build) based on the sparse documentation at https://en.cppreference.com/w/cpp/language/coroutines . The target, for ...
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Password Generator "Crapcode"
I made Password Generator on C#.
It prompts the user for the length of the password, whether it contains numbers, lowercase letters, uppercase letters or symbols, and generates a strong password from ...
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Feedback on generator functions and class composition in Python 3
I have written a Python script whose purpose is to read logs from CloudWatch and then post them to ElasticSearch. It is not quite finished but I've progressed far enough that I could benefit from ...
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Async linked list to and from async iterable
I'm working on some stuff that works better with (immutable async) linked lists such as this:
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IP address exclusion algorithm
The below algorithm is supposed to take a list of input IPs/networks and a list of IPs/networks to exclude, and return a list of networks that don't include any of the IPs/networks to exclude...
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A word generator meant to be piped to hashcat/jrt which would then use amplificators (rules)
This piece of code does a linear generation with two 'tweaks':
It sets a global loop as an index to reference variables that are holding values that need to be ...
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CSS preview generator (in python)
Given a CSS file the script generates an HTML preview of all the CSS definitions by recursively drilling down the chain of nested classes, ids and tag names. Rules with ...
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Prime sieve generator
I wrote a simple prime sieve in Python. But it ended up looking... ugly. I included a few of the most basic optimizations. When posting this question SE suggested a bunch of questions on the same ...
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Wrapping an asynchronous generator in Python
Since Python 3.6 and PEP 525 one can use asynchronous generator:
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Sudoku seed generator
The code returns a string ready to seed at sites like sudoku-solutions.com.
It works great but as I couldn't find other simple examples for my level I hope for some insights on this and ways to ...
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Using generators on Observable class
I've decided to implement a simple case of the Observer pattern. I've gone about this considering you can only register 1 single observer in the Observable, instead of allowing multiple ones.
I ...
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infinite generator with eviction
I made a struct that will loop through a list, and return the next element on calls to the Get() method.
It also allows to remove elements from the list by calling the Evict() method, and is safe for ...
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Creating generator object with image augmentation to train Convolutional Neural Networks with Keras
I am currently self-studying on Python generator object and use it to generate training data and do augmentation on-the-fly, then feed it into Convolutional Neural Networks.
Could anyone please help ...
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Scraping pdf files with PyPDF2 and appending regex lists into Dataframe
I am looping through pdf files, using regex search and findall to append list type data into a dataframe. I export to excel for end user to easily search info. Below is method breakdown of this script:...
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Access a database and an API, uses python generators, and matches the results based on names, interview assignment
Thanks in advance if you are reading this code.
I recently submitted this code as part of an interview (took about 4-5 hours). Unfortunately, they did not like the code and I received a form ...
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Check existence of user identification number
I was tasked with writing a python script to check if a passed ID number exists within a file. The file I was give contains roughly 25,000 unique ID numbers. An ID number is a unique 9 digit number.
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ID generator class for my Repair Shop Software
I have made a ID generator class for my Repair Shop Software, that generates new ID for all data entities that are used in the software. It also converts int value ...
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Random password generator in C
This is a simple password generator. What do you think about it? I am learning C for a while at school and at home. This just has a mix of symbols, lowercase, uppercase and numbers, with a ...
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Creating an inverted index from text documents
I am working on an information retrieval project, where I have to process a ~1.5 GB text data and create a Dictionary (words, document frequency) and posting list (document id, term frequency). ...
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Generating sequential alphanumeric values that match a certain pattern
I'm working on generating large volumes of test data for some performance testing. Part of this is going to involve generating a lot of values that represent an "MBI", which is a certain kind of alpha-...
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A GapHelper static class to create unique (non-existing) size restricted names
I am working with a 3th party library which has following interface defined for a processing task:
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Map unique raw words to a list of code words
Problem
Write a function that replaces the words in raw with the words in code_words such that the first occurrence of each ...
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Customizable unidirectional questionaire in javascript
I wrote the below answer for the following question on SO a couple of days ago, and I was curious if the usage of the generator function is an acceptable one.
I choose the generator function, because ...
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c++ python like range function to use in for loops
It's a simple range function that works like python range and it is only a syntactic sugar for the usual for loop
if we want to operate on numbers in the range from 1 to 10 (1 ... 9) we use this code ...
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Circular Doubly Linked List with generators
I didn't find an implementation on CR of the circular doubly linked list, using generators. Hence, I tried it myself.
Description
The class Deck represents a ...
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Python-style Generator in Java
I have implemented Python-style generators within Java. I might be reinventing the wheel here, but I feel that the ability to define a Generator with an anonymous class is the most flexible approach. ...
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Random String Generation module in Python
The module is for facilitating random string generation. The example I use to explain it is the following:
Instead of writing
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An implementation of Project Wonderful's Infinite Auction
Project Wonderful is no more. ☹ As a little project, I've been trying to (slowly) re-implement the service. Here's my implementation of the Infinite Auction. The main function is ...
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Generating combinations of specific values of a nested dict
I am developing a framework that allows to specify a machine learning model via a yaml file with different parameters nested so the configuration files are easy to ...
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