diagrams | : art : Diagram as Code for prototyping cloud system | Architecture library

 by   mingrammer Python Version: 0.23.4 License: MIT

kandi X-RAY | diagrams Summary

kandi X-RAY | diagrams Summary

diagrams is a Python library typically used in Architecture, Docker applications. diagrams has no bugs, it has no vulnerabilities, it has a Permissive License and it has high support. However diagrams build file is not available. You can install using 'pip install diagrams' or download it from GitHub, PyPI.

Diagrams lets you draw the cloud system architecture in Python code. It was born for prototyping a new system architecture design without any design tools. You can also describe or visualize the existing system architecture as well. Diagrams currently supports main major providers including: AWS, Azure, GCP, Kubernetes, Alibaba Cloud, Oracle Cloud etc... It also supports On-Premise nodes, SaaS and major Programming frameworks and languages. Diagram as Code also allows you to track the architecture diagram changes in any version control system. NOTE: It does not control any actual cloud resources nor does it generate cloud formation or terraform code. It is just for drawing the cloud system architecture diagrams.

            kandi-support Support

              diagrams has a highly active ecosystem.
              It has 30062 star(s) with 1904 fork(s). There are 361 watchers for this library.
              There were 1 major release(s) in the last 6 months.
              There are 263 open issues and 180 have been closed. On average issues are closed in 308 days. There are 72 open pull requests and 0 closed requests.
              It has a negative sentiment in the developer community.
              The latest version of diagrams is 0.23.4

            kandi-Quality Quality

              diagrams has 0 bugs and 0 code smells.

            kandi-Security Security

              diagrams has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.
              diagrams code analysis shows 0 unresolved vulnerabilities.
              There are 0 security hotspots that need review.

            kandi-License License

              diagrams is licensed under the MIT License. This license is Permissive.
              Permissive licenses have the least restrictions, and you can use them in most projects.

            kandi-Reuse Reuse

              diagrams releases are available to install and integrate.
              Deployable package is available in PyPI.
              diagrams has no build file. You will be need to create the build yourself to build the component from source.
              Installation instructions, examples and code snippets are available.
              diagrams saves you 2043 person hours of effort in developing the same functionality from scratch.
              It has 5624 lines of code, 120 functions and 220 files.
              It has low code complexity. Code complexity directly impacts maintainability of the code.

            Top functions reviewed by kandi - BETA

            kandi has reviewed diagrams and discovered the below as its top functions. This is intended to give you an instant insight into diagrams implemented functionality, and help decide if they suit your requirements.
            • Generate documentation for pvd
            • Generate the documentation for the given typename
            • Generate the class for the given typ
            • Append two edges
            • Render the graph
            • Return lowercase or title
            • Create an apidoc file
            • Make a module
            • Load a template
            • Return the path to the resource directory
            • Return the path to the template directory
            • Absolute path to the documentation root directory
            • Return the root directory of the pvd file
            • Convert SVG to PNG
            • Clean up png files
            • Round images to png
            Get all kandi verified functions for this library.

            diagrams Key Features

            No Key Features are available at this moment for diagrams.

            diagrams Examples and Code Snippets

            Examples,How to draw simple block flow diagrams
            Jupyter Notebookdot img1Lines of Code : 54dot img1License : Permissive (MIT)
            copy iconCopy
            from pyflowsheet import Flowsheet, BlackBox, Stream, StreamFlag, Port, SvgContext,VerticalLabelAlignment, HorizontalLabelAlignment
            from IPython.core.display import SVG, HTML
            pfd= Flowsheet("V100","Block Flow Diagram", "Demo Flowsheet for showing blo  
            Kubernetes diagrams,Usage
            Godot img2Lines of Code : 17dot img2License : Permissive (Apache-2.0)
            copy iconCopy
            $ ./k8s-diagrams --help                                                                                           ✔ 
               k8s-diagrams - Create diagram from the Kubernetes API.
               k8s-diagrams [global options] command [command options] [  
            copy iconCopy
            (venv) $ pip install mqt.ddsim
            from qiskit import *
            from mqt import ddsim
            circ = QuantumCircuit(3)
            circ.cx(0, 1)
            circ.cx(0, 2)
            backend = ddsim.DDSIMProvider().get_backend('qasm_simulator')
            job = execute(circ,   

            Community Discussions


            saveWidget works interactively, but no file saved when using buildVignette
            Asked 2022-Apr-11 at 17:06

            When I run the following code interactively, the expected testFig.html is produced and functions correctly.



            Answered 2022-Apr-11 at 17:06

            As noted in the comments to the question, the solution to the question asked is to put the file produced in a folder in the vignette directory. This protects the necessary files from being deleted when using buildVignette. However, this approach does not work when building and checking a package. I will ask a separate question on that.

            Source https://stackoverflow.com/questions/71788938


            Big O Understand Quadratic n(n+1)/2 diagram
            Asked 2022-Mar-29 at 02:29

            Reading DS & Algorithms on Quadratic n(n+1)/2. There are 2 diagrams here Figure 4.1a & 4.1b.

            I understand 4.1a diagram but not diagram 4.1b.

            I know Figure 4.1b is n/2 (x-axis) multiple (n+1) (y-axis). I don't understand the jaggeet line shown in this figure.

            Any help be great.



            Answered 2022-Mar-29 at 02:29
            Visual representation

            It's quite simple really. You take the last bar from 4(a) and stick it on the first bar of 4(a). That results in the first bar of chart 4(b). Then you take the second to last and second bar of chart 4(a), stick them on top of each other and you get the second bar for chart 4(b). And you can do this for the other bars as well.

            That's just a visual representation of the formula so that you can easily see it's n(n+1)/2.

            Mathematical idea

            When you think of it in more mathematical terms it's also quite logical.

            We have n summands.

            1 + 2 + 3 + ... + (n-3) + (n-2) + (n-1) + n

            Now write the same numbers from 1 to n beneath this in reversed order so from n to 1.

            n + (n-1) + (n-2) + n(n-3) + ... + 3 + 2 + 1

            Now merge those two sequences and rearrange the summands intelligently and set some parenthesis.

            [n + 1] + [(n-1) + 2] + [(n-2) + 3] + [(n-3) + 4] + ... =

            We still have n summands, each of them is (n + 1) but as we've just written the same numbers twice we need to divide our result by 2.

            (n + 1) + (n + 1) + (n + 1) + (n + 1) + ... = n (n+1) /2

            Mathematical proof using induction

            Given the hypothesis n (n+1) /2 it's not hard to proof via induction that this is in fact true. See Wikipedia.

            Source https://stackoverflow.com/questions/71655481


            Plot Venn diagram from a boolean set notation in Python
            Asked 2022-Mar-07 at 16:40

            The following code plots a Venn diagram by interpreting the set input in boolean form and shading the respective region of interest:



            Answered 2022-Mar-07 at 16:30

            From the error (below) returned by your code when calling plot_diagram('not B'):

            Source https://stackoverflow.com/questions/71374196


            ggplot2: Projecting points or distribution on a non-orthogonal (eg, -45 degree) axis
            Asked 2022-Feb-06 at 17:04

            The figure below is a conceptual diagram used by Michael Clark, https://m-clark.github.io/docs/lord/index.html to explain Lord's Paradox and related phenomena in regression.

            My question is framed in this context and using ggplot2 but it is broader in terms of geometry & graphing.

            I would like to reproduce figures like this, but using actual data. I need to know:

            • how to draw a new axis at the origin, with a -45 degree angle, corresponding to values of y-x
            • how to draw little normal distributions or density diagrams, or other representations of the values y-x projected onto this axis.

            My minimal base example uses ggplot2,



            Answered 2022-Feb-06 at 17:04

            Fun question! I haven't encountered it yet, but there might be a package to help do this automatically. Here's a manual approach using two hacks:

            1. the clip = "off" parameter of the coord_* functions, to allow us to add annotations outside the plot area.
            2. building a density plot, extracting its coordinates, and then rotating and translating those.

            First, we can make a density plot of the change from initial to final, seeing a left skewed distribution:

            Source https://stackoverflow.com/questions/71001954


            What does composition mean in the composition vs inheritance debate?
            Asked 2022-Feb-04 at 23:54

            I was learning about the Bridge Design pattern. To quote:

            The Bridge pattern attempts to solve this problem by switching from inheritance to the object composition. …

            And then, the following image is shown:

            When people are talking about composition as an alternative for inheritance, do they refer to both aggregation and composition relationships? If not, what do they mean exactly?

            I wonder this because the picture has an aggregation relationship between Color and Shape, not a composition one.



            Answered 2022-Feb-03 at 13:37

            Normally, when people talk about using composition vs. inheritance, they are talking about alternative ways of solving the same problem. In both cases, a "base class" provides an implementation of an interface that you want to reuse in your "derived class"

            When you implement this with inheritance, there is an undesirable is-a relationship between the derived class and the base class, with the effect that implementation details of the base class, which should be hidden, can become changes in the derived class class.

            When you implement this with composition -- a real composition relationship -- the "derived" only has an is-a relationship with the interface that it wants to implement, and the cost of this is that it must delegate calls to the "base" class.

            In the Bridge pattern, which you reference, the goal is a little different. You do want to isolate the containing class from change to the connected implementation, but there is no is-a relationship between the containing class and an interface of the contained class.

            The relationship between them may be one of composition, or may be simple aggregation -- that is an implementation detail. Often, the concrete implementation of the contained class will be injected as an interface into the containing class constructor, and in that case the relationship is just aggregation.

            Source https://stackoverflow.com/questions/70971858


            Independent Thread Scheduling since Volta
            Asked 2022-Feb-04 at 14:37

            Nvidia introduced a new Independent Thread Scheduling for their GPGPUs since Volta. In case CUDA threads diverge, alternative code paths are not executed in blocks but instruction-wise. Still, divergent paths can not be executed at the same time since the GPUs are SIMT as well. This is the original article:

            https://developer.nvidia.com/blog/inside-volta/ (scroll down to "Independent Thread Scheduling").

            I understood what this means. What I don't understand is, in which way this new behavoir accelerates code. Even the before/after diagrams in the above article do not reflect an overall speed-up.

            My question: Which kinds of divergent algorithms will run faster on Volta (and newer) due to the described new scheduling?



            Answered 2022-Feb-04 at 14:37

            The purpose of the feature is not necessarily to accelerate code.

            An important purpose of the feature is to enable reliable use of programming models such as producer-consumer within a warp (amongst threads in the same warp) that would have been either brittle or prone to hang using the previous thread schedulers pre-volta.

            The typical example IMO of which you can find various examples here on the cuda tag, is people trying to negotiate for atomic locks among threads in the same warp. This would have been "brittle" (and here) or not workable (hangs) on previous architectures. It works well, on volta, in my experience.

            Here is another example of an algorithm that just hangs on pre-volta, but "works" (does not hang) on volta+.

            Source https://stackoverflow.com/questions/70987051


            How to represent communication protocol in UML?
            Asked 2022-Jan-30 at 21:36

            In my UML model I have a system and its subcomponents that talk to each other. For Example, I have a computer and a RC robot where they talk via Bluetooth. Currently in the diagrams the flow is something like:

            "Computer" triggers "setVelocity()" function of "RC car".

            At this point, I want to refine the communication by saying that

            • computer sends "Movement" message
            • with velocity field is set to 100 and direction field is set to 0
            • which is acknowledged by RC car by sending ACK message
            • with message id "Movement" and sequence number X.

            How do I do that?

            EDIT: Clarification

            Normally this is what my diagram looks like without protocol details:

            But when I tried to add messages, there are at least 2 problems:

            • It seems like Computer first triggered the setVelocity() funciton and then sendBluetoothMessage() sequentially which are not sequential . The followings of setVelocity() are actually what happens inside that.
            • sendBluetoothMessage() is actually a function of Computer. But here it belongs to RC Car. (or am I wrong?) And the same things for ACK.

            Thanks for the responses. You are gold!



            Answered 2022-Jan-29 at 17:48
            Communication protocols in general

            There are two main ways of representing the sending of a movement message between two devices:

            1. A movement() operation on the target device, with parameters for the velocity and direction. You would typically show the exchange in a sequence diagram, with a call arrow from the sender to the receiver. The return message could just be label as ACK.

            2. A «signal» Movement: Signals correspond to event messages. In a class diagram, they are represented like a class but with the «signal» keyword: velocity and direction would be attributes of that signal. ACK would be another signal. The classes that are able to receive the signals show it as reception (looks like an operation, but again with «signal» keyword).

            In both cases, you would show the interactions of your communication protocol with an almost identical sequence diagram. But signals are meant for asynchronous communication and better reflect imho the nature of the communication. It's semantic is more suitable for your needs.

            If you prefer communication diagram over interaction diagrams, the signal approach would be clearer, since communication diagrams don't show return messages.

            Why signals is what you need (your edit)

            With the diagrams, your edited question is much clearer. My position about the use of signals is unchanged: signals would correspond to the information exchanged between the computer and the car. So in a class diagram, you could document the «signal»Movement as having attributes id, velocity and direction:

            In your sequence diagram, you'd then send and arrow with Movement (X,100,0). Signal allows to show the high level view of the protocol exchanges, without getting lost on the practical implementation details:

            The implementation details could then be shown in a separate diagram. There are certainly several classes involved on the side of the computer (one diagram, the final action being some kind of sending) and on the side of the car (another diagram: how to receive and dispatch the message, and decode its content). I do not provide examples because it would very much look like your current diagram, but the send functions would probably be implemented by a communication controller.

            If you try to put the protocol and its implementation in the same diagram, as in your second diagram, it gets confusing because of the lack of separation of concerns: here you say the computer is calling a send function on the car, which is not at all what you want. The reader has then difficulty to see what's really required by the protocol, and what's the implementation details. For instance, I still don't know according to your diagram, if setVelocity is supposed to directly send something to the car, or if its a preparatory step for sending the movement message with a velocity.

            Last but not least, keep in mind that the sequence diagram represents just a specific scenario. If you want to formally define a protocol in UML, you'd need to create as well a protocol state machine that tells the valid succession of messages. When you use signals, you can use their name directly as state transition trigger/event.

            Source https://stackoverflow.com/questions/70894418


            Adjust mermaid diagram white space in Azure devops wiki
            Asked 2022-Jan-18 at 22:36

            Goal: Work flow diagram displays underneath the header text with standard spacing
            Actual Results: Work flow diagram displays underneath header with a standardized amount of white space
            Errors: No errors messages
            Troubleshooting Steps: I attempted to follow the solution steps in this article but it makes the mermaid diagram no longer display and produces formatting error codes.



            Answered 2022-Jan-18 at 22:36

            For Azure DevOps Services' Wiki, adding this line works with your chart. It's line #3 in the full chart source below.

            • %%{init: {"flowchart": { "useMaxWidth": false } }}%%
            Full Chart Source

            Source https://stackoverflow.com/questions/70758449


            Including a create message inside a combined fragment in sequence diagram
            Asked 2021-Dec-26 at 23:39

            I am working on my assignment about sequence diagrams. my question is if can we include a creation or deletion message in a combined fragment



            Answered 2021-Dec-26 at 11:11

            In short: yes. You can do that with no issue.

            In more detail: try to stick to UML rules but don't get blocked by just looking into the law book. Of course it's best to not violate the rules set up by the UML gods. But like when you are standing a red cossing light at night where you can see and hear nobody else, then what would hinder you to cross the street anyway?

            One common mistake seen so often is to forget putting join nodes in ADs which will make the whole network get stuck at a particlar action. Yes, wrong. But basically only to machines and most people can read the meaning witout any issue. Only the lawyers will pick that up as being wrong.

            So to sum up: when you model something and you feel that it transports the message then it's okay. Even when being not 100% correct. Strive for correctness but don't let it block you from doing the job. If you raise discussion it ain't bad. Not at all! Models are meant to discuss about something. So if your model got a discussion started it's even better. You can always ask for advice and fix it later.

            Source https://stackoverflow.com/questions/70475474


            Does UML shared aggregation imply absence of cycles?
            Asked 2021-Dec-13 at 10:07
            In short

            Shared aggregation seems to express nothing more than a simple association. It is apparently a "modeling placebo" with no objective reason to use it (except in specific contexts where modelers have agreed between them on specific additional semantic).

            Several sources claim however that shared aggregation would imply absence of cycles in the aggregation graph of instances. This would make aggregation a powerful tool in the domain of graph modeling.

            But I couldn't find any evidence of those claims in the specifications. Did I miss some indirect evidence (e.g. interplay of several constraints)?

            More details The quote

            In their book The Unified Modeling Language Reference Manual, 2nd Edition, Booch, Jacobson and Rumbaugh claim about (shared) aggregation:

            The distinction between aggregation and association is often a matter of taste rather than a difference in semantics. Keep in mind that aggregation is association. Aggregation conveys the thought that the aggregate is inherently the sum of its parts. In fact, the only real semantics that it adds to association is the constraint that chains of aggregate links may not form cycles, which is often important to know, however. (...) In spite of the few semantics attached to aggregation, everybody thinks it is necessary (for different reasons). Think of it as a modeling placebo.

            Other rather well informed sources(e.g. uml-diagrams.org and several academic papers) keep the directed acyclic graph for granted as well.

            Verification against the UML specifications

            The books is from 2004, based on UML 2.0. But most of this claim is still verified in the UML 2.5.1 specification. Shared aggregation is defined therein in very vague terms and without any objective advantage over a simple association (p.112):

            Sometimes a Property is used to model circumstances in which one instance is used to group together a set of instances; this is called aggregation. To represent such circumstances, a Property has an aggregation property, of type AggregationKind; (...)
            shared : Indicates that the Property has shared aggregation semantics. Precise semantics of shared aggregation varies by application area and modeler.

            Another clause about aggregation prevents some special cycling situations (p.200):

            An end Property of an Association may only be marked as a shared or composite aggregation if the Association is binary and the other end is not marked as a shared or composite aggregation.

            I have however not found any evidence that "chains of aggregate links may not form cycles" in the general case. I also did not find other properties such as transitivity and anti-symetry which could allow to infer the absence of cycles.

            Is the claim by the UML inventors now obsolete? Or did I miss something in the current specs that would allow to derive this statement ?



            Answered 2021-Dec-12 at 11:32

            I think my favorite page 110 of UML 2.5 is quite clear about this:

            Sometimes a Property is used to model circumstances in which one instance is used to group together a set of instances; this is called aggregation. To represent such circumstances, a Property has an aggregation property, of type AggregationKind; the instance representing the whole group is classified by the owner of the Property, and the instances representing the grouped individuals are classified by the type of the Property. AggregationKind is an enumeration with the following literal values:

            none Indicates that the Property has no aggregation semantics. shared Indicates that the Property has shared aggregation semantics. Precise semantics of shared aggregation varies by application area and modeler. composite Indicates that the Property is aggregated compositely, i.e., the composite object has responsibility for the existence and storage of the composed objects (see the definition of parts in 11.2.3).

            Composite aggregation is a strong form of aggregation that requires a part object be included in at most one composite object at a time. If a composite object is deleted, all of its part instances that are objects are deleted with it.

            Emphasis by me. Shared aggregation is out of the run in any case since its semantic is undefined by definition. So the implication is only for composite aggregation.

            What is the standard?

            UML has quite some history. And there are lots of citations out there. Only the fewest get updates along with UML evolving. Although Booch et al. invented UML, they are no longer defining the standard. That's done by OMG and they publish the ISO standard (for which you can pay extra money if you like). Quite some terms go round which have ancient origins and are outdated the one or other way. Still, they are being used - and in the now wrong context.

            Is the standard perfect?

            Definitely not. It's evolving and still has quite some flaws or misconceptions. In my opinion the introduction of shared aggregation in UML 2.0 was not a so good idea. To define something that has no definition per definition seems odd. And looking at the confusion about this concept proves me right.

            Source https://stackoverflow.com/questions/70316119

            Community Discussions, Code Snippets contain sources that include Stack Exchange Network


            No vulnerabilities reported

            Install diagrams

            It requires Python 3.6 or higher, check your Python version first. It uses Graphviz to render the diagram, so you need to install Graphviz to use diagrams. After installing graphviz (or already have it), install the diagrams. macOS users can download the Graphviz via brew install graphviz if you're using Homebrew.


            To contribute to diagram, check out contribution guidelines. Let me know if you are using diagrams! I'll add you in showcase page. (I'm working on it!) :).
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