BellmanFord | Python - implementation of Bellman-Ford Algorithm

by jameslinjl Python Version: Current License: No License

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kandi X-RAY | BellmanFord Summary

BellmanFord is a Python library. BellmanFord has no bugs, it has no vulnerabilities and it has low support. However BellmanFord build file is not available. You can download it from GitHub.

james lin jl3782 csee 4119 - computer networks programming assignment 2. description: this program implements the bellman-ford algorithm on distance vectors as described in class. it makes use of udp to simulate the transfer of packets between routers. the routing packets are structured in normal string format. more specifically, they contain the source host, the type of packet it is, and potentially a payload depending on the type of packet. these are delimited by '&' and the payload, typically a neighbor's routing information, is delimited by '/'. these are stored in a routing table, which consists of a python dictionary in which each key is the neighbor's ip address and local port and the value for each key is a list with the appropriate routing information. each piece of routing information is a tuple, which contains the destination location, cost, and next hop. on top of this layer is a transport layer, which allows

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BellmanFord has a low active ecosystem.

It has 0 star(s) with 0 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

BellmanFord has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of BellmanFord is current.

Quality

BellmanFord has 0 bugs and 0 code smells.

Security

BellmanFord has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

BellmanFord code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

BellmanFord does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

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BellmanFord releases are not available. You will need to build from source code and install.

BellmanFord has no build file. You will be need to create the build yourself to build the component from source.

It has 529 lines of code, 21 functions and 3 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed BellmanFord and discovered the below as its top functions. This is intended to give you an instant insight into BellmanFord implemented functionality, and help decide if they suit your requirements.

main entry point .
handle incoming packet
This method is used to update paths .
Sends a timeout to all neighbors
Change the active neighbor .
Changes the neighbor value
Restore a neighbor link .
Return the string representation of this IP address .
Destroy a neighbor link .
Send a packet to destination .

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BellmanFord Key Features

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BellmanFord Examples and Code Snippets

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Community Discussions

Trending Discussions on BellmanFord

Using timeit to time algorithms without timing already sorted or setup

c++ error : pointer that points to an array

QUESTION

Using timeit to time algorithms without timing already sorted or setup

Asked 2022-Mar-26 at 22:30

I am trying to use timeit to time two algorithms I have implemented, but I need to construct a graph object and don't want to sort graphs that are already sorted (for time accuracy).

This is the best attempt I have so far at separating the setup from the actual timing. Later I want to call ShortestPathAlgorithm() with no arguments and print the results in a table to a txt file, so I believe the format has to be something like this. With everything being completed inside the shortestPathAlgorithm Function.

Can anyone give any pointers on how to do all of this in the nested functions?

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ANSWER

Answered 2022-Mar-26 at 19:33

Your understanding is correct. However, there are some issues that could be improved.

Firstly, you usually want to measure only one algorithm at a time. If you measure each algorithm separately you can compare the two and get more accurate data. Also, I would stick to measuring it on the same graph multiple times and then average the time to get one more accurate (you can use copy.deepcopy() to make duplicates of the graph). Then do this on each of the graphs you have. Since each algorithm may be more efficient on different types of graphs (you would lose this information completely if measured as you propose).

Secondly, since timeit can repeat the measured operation multiple times but the setup is done only once before any measurement starts (see the docs) you would measure the algorithm on already traversed (or sorted as you put it) graphs. Which you correctly point out.

As a solution, I suggest manually timing the runs using the time.perf_counter_ns(). The code for measuring the bellmanFord algorithm could look as such:

Source https://stackoverflow.com/questions/71630480

QUESTION

c++ error : pointer that points to an array

Asked 2020-Apr-23 at 17:27

In XCode it says:Thread 1: EXC_BAD_ACCESS (code=1, address=0x3c000003e7)

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ANSWER

Answered 2020-Apr-23 at 12:51

An array is not a pointer, and no amount of casting can change that fact.
*(g+i) (i.e. g[i]) is m[i], which is an int[7], not an int*.
When you interpret its first elements as an address, hilarity ensues.

You need to start with an array of pointers, since that can be converted to a pointer to a pointer.

With minimal changes to your code, it might look like this:

Source https://stackoverflow.com/questions/61387104

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Vulnerabilities

No vulnerabilities reported

Install BellmanFord

You can download it from GitHub.
You can use BellmanFord like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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