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Your First pyRevit Button: An Easy Step-by-Step Tutorial [EP. 6/10]

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Summary

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This content guides users through the process of creating custom Revit add-ins using Py Revit, demystifying the development process and encouraging hands-on learning by building a practical "rename views" tool.

Mind Map

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คลิกเพื่อสำรวจ Mind Map แบบอินเตอร์แอคทีฟฉบับเต็ม

hi everybody many of you think that it's

still very hard to create custom Revit

addings and I Want to Break Down The

Stereotype I want to take you step by

step for the process of creating new

tools for Revit but most importantly I

want you to feel what it's like to

create custom Revit addings once you

will create your first button you'll

want to create more you might even have

multiple ideas during this video for

your new tools that's how we all start

and the best way of learning is actually

by doing so let's get you into this

developers flow and create your first

custom par button in just a few minutes

but before we begin I actually expect

that you already have your own custom

parit extension created either with my

EF pit starter kit or you made it on

your own it only takes 2 minutes to

create your custom parit extension and

you can watch this video where I will

show you how to do that along with the

tour of my EFI RIT starter kit which is

absolutely free cuz there are a lot of

resources and code samples and I want

you to get the most out of it and now

let's create your first parid button I'm

going to create my button here in the

dev panel it's really good practice to

have a special panel where you create

new tools which can be unfinished and

once they finished you can move them

anywhere else by just moving the folder

so don't always stress where you're

going to create it to create it I'm

going to hold out and click on one of

these kind of place holder buttons and

it's going to open the folder where it's

located I can go one folder outside some

in my Dev panel and you can see in here

I have Dev button one two and three and

same is here going to go outside you

also see there a bunch of panels and I

also have here about resources

placeholder panel and death

panel so I'm going to go back to the

death panel and I'm just going to

duplicate one of the

buttons let's call it our first button

and most importantly make sure you spell

push button correctly if you cannot see

your button appear in pyit when we're

going to reload it it probably means

that you misspell this one push button

right here or maybe you haven't put a

script and an icon inside of there now

first of all let's place here an icon

and we also going to put some kind of

template inside of the script file so we

can actually continue creating our

button to place here an icon we can

actually go to resources and right here

we're going to go to icons8.com in here

we can get the free

resources in the search icons I'm going

to write here something like rename

because spoiler alert during this video

I'm going to show you how to rename your

views with py RIT and we're also going

to create little interface and so on but

you will see this in a

moment now in here I'm going to select

just a random icon I can click on the

download when you will be downloading

the icon make sure it's smaller than 96

by 96 pixels but you can always take it

smaller just to be safe now click on

download when it's ready just drag it

into the folder of your newly created

button now we can get rid of the

previous icon and rename this one to the

icon you could also create here a second

icon and call it icon the dark to have

different icons for the light and dark

theme but I don't want to do that I'll

be fine with just one icon now now we

have the icon let's open up the script

and change something there as well now

since I duplicated my existing button I

already have here some kind of template

but if you haven't done this we can go

to my EF pyit starter kit then here in

the templates have different templates

I'm going to click on py RIT minimum

template and here this is a very

simplified version we have some

description the name of the button a few

most important Imports a few variables

and just blocks for your main and

functions just going to copy that and

paste it here in my Buton Buton first of

all let's change the title in here I'm

going to call it rename

views then this is the description that

your user is going to see when they

hover over the button I'm just going to

quickly modify this and you can write

here anything you want but this is how I

prefer to do this first of all I like to

know the version and the date then in

here I'm going to write the description

of this button then depending on the

tool I like to describe how to use it

for example for this one I could write

something like click on the button then

select views Define renaming rules and

lastly rename views but it always

depends on how much information you want

to give to the users then for the update

it's good to track what kind of changes

you make but in this case I'm just going

to set the date and today is the release

of this tool then in here you can also

add some features that you are planning

to add later but I'm not going to be

planning anything for this tool all

right then in here we have our common

import our Autodesk import our P RIT

import and sometimes we need a list from

net Library this is how you get it and

here are our variables and here we're

going to write our code let's remove

function and now let's go to Revit then

we're going to go to P Revit tab I'm

going to click on this button right here

reload then on this menu say yes and

once it's reloaded when you're going to

go back to your toolbar you're going to

see a new button appear if you've done

everything correctly if you haven't done

anything correctly usually it's because

of the folder structure just make sure

that you put the right suffixes like

that push button that tab that panel all

of that also in the right order now

here's my button when I'm going to click

on it it just going to give me some kind

of print statement which is a template

has been developed by Eric frit which

comes from here on the bottom right we

don't need it let's remove it and now we

are ready to start coding but before

you're going to open your code editor I

want you to grab a piece of paper and a

pen we're going to do a little bit

brainstorming together to decide what

kind of tool are we creating as you

already understood from the name we're

going to rename our views by using fine

and replace logic this will help me to

introduce you to various RAV API concept

and also show you how to take a big tool

idea and break it down into smaller

manageable steps this is necessary as it

helps you to think more like a

programmer and you might discover some

hidden steps in between that you need to

address to avoid errors that's what we

also going to do and also a huge remark

here it doesn't need to be beautiful or

very detailed it just have to make sense

to you and also maybe it's just me but I

tend to rewrite the steps over and over

until they start making more sense to me

as it helps me to think about about the

problems and find a solution to them so

now let's think how should we rename our

view in Revit there are a few steps that

we need to do first of all we need to

grab a few views and there are two ways

we're going to do that first of all

we're going to try to get selected views

in the project browser in ravit UI and

if there is nothing selected then we're

going to select our views with the p

form and I'm going to show you how to

use it don't worry then we need to

define a few renaming rules such as what

do we want to find what we want to

replace it with the prefix the sufix and

all of that and then we will create a

new view name and we're going to rename

all of the views and also by looking at

this diagram you might realize that

there's actually extra step in between

because when we going to rename our

views we want to make sure that it's a

unique view name cuz otherwise we're

going to get an error saying that the

view name is not unique and it's not

going to rename it and we also might see

the red wall of text if you're not going

to use try and accept

statements all right and this is our

diagram this is what we're going to code

and you can use it as the comments in

your code or however you like it just

going to keep the paper in front of me

and follow along all right and now we're

going to go to the coding part let's

open our code editor and the first step

we're going to do is Select some views

let me zoom in as well so you can see it

better now as I mentioned in the diagram

we need first of all we're going to try

to get selected views and then we're

going to try to use the pirated form to

get the selected views the same as

getting our selected elements for that

we will need to make sure that we have

our UI do Define right here and can WR

here selected element IDs equals UI doc

selection and then there is a method

called get element

IDs now we want to take all of these

element IDs and convert it to selected

elements let's make it a list

comprehension I'm going to write dog get

element we're going to provide this

element IDs then in here we're going to

write for element ID in selected element

IDs so we're going to iterate for this

list I'm we're going to get the actual

element from the element ID now we don't

care really about all the selected

elements what we care about is selected

views so in here we're going to create

another Leist comprehension and there

we're going to write I want to get all

elements or element and selected

elements and in list comprehension we

can also make here an if statement and

in here I'm going to write if is subass

now we need to write type of the element

and we're going to provide

view this method right here will just

check if the type of the element is part

of the view or any of its children

classes cuz as you know in The

Inheritance hierarchy we have our view

and then there a lot of classes based on

it like view plan view section and all

of those classes so this will make sure

that we check if we have any views

selected and now let's add here a

comment that we're getting a views which

are selected in the project browser

however if you don't have anything

selected in the project browser we want

to get our views differently so this way

we're going to write if none

selected we're going to prompt select

views from parit forms and there is

something like select views I'm not sure

if that's how it's written but you will

see in a moment so we're going to just

write if not selected views then I'm

going to write selected views

equals and then in the import somewhere

right here you can see from pit we import

import

forms we're going to write here forms

and I'm going to write select views I

don't think I need to provide here any

arguments optionally I can provide my

title button name weave multiple all of

that but I can see that multiple is set

to true so I'm just going to leave it oh

and if you want to see the dock strings

can hold control and click on Q then

you're going to see this menu but to do

that you need to make sure that you set

your interpreter settings and it knows

where P rabit library is located in my

case right here I provided my RIT API

stops and right here I provided my pit

Masters pit lip folder this way P charm

knows about these functions and it can

read about them all right and before

we're going to go any further we need to

ensure that we have some views selected

again we're going to write if not

selected views and this time I'm going

to use forms alert I'm going to write

now views selected please try

again I'm going to write here exit

script equals to true this will make

sure that we stop execution of the code

we're not going to see anything further

for example let's write here print

done and if this is triggered we're

never going to see this print statement

done now let's open ravit and see if it

works I'm going to click on this button

and you will see I get a select menu I'm

like okay let's check everything and

click on select and it says no view

selected please try again probably means

that I messed up something let's come

back in here and right away I can see

right here because I use the variable

select views but in here accidentally I

wrote selected elements let's change

that and we're going to come back to

ravit now I'm going to click on it again

since I don't have anything selected I'm

supposed to get this menu and I do I'm

going to select all the

views right here the print statement

done means that I manag to select My

Views and the script continues but if

I'm going to click on here I don't

select anything and close it you're

going to get an alert no views selected

please try again but most importantly

it's going to stop execution of the code

and therefore we're not going to create

any errors we're not going to see any

wrong statements and so on and lastly we

can also select some views this way

right here click on rename views and

we're not supposed to see any form we're

just supposed to see the done because we

selected it on the first try right here

so this one worked and this one didn't

work didn't work and we continue with

the code CU we already have our selected

views all right selecting views is easy

let's go to the Second Step where we're

going to Define renaming rules at first

you can hardcode this values so we're

going to Define our fine replace sufix

prefix and we're going to create a

working script by using this values and

only then you can think about the UI

form because first of all you need to

make sure that it works before you start

thinking about how to make it pretty I

highly recommend you to create this MVP

which stands for minimum viable product

and it's just to prove your idea first

and then we can focus on optimizing and

make it look nicer and all of that

because you see in the past I've spent a

lot of hours making a nice forms for

something that apparently I couldn't do

at the time yet so make your MVP first

and once it working they you can focus

on all the forms and make it beautiful

all right now in my case I'm going to

look here for something like floor plan

and I'm going to replace it maybe with

level or anything else we're going to

change it later

anyway now the next step we need a

transaction because we are about to make

changes transactions in Revit API are

necessary to make any changes in your

Revit projects and that's great news for

the beginners because it just means that

you cannot mess up anything accidentally

in your projects while you explore ravit

API so you can feel safe and do whatever

you want with ravit API until you use

transactions cuz once you start using

them then you have to be really careful

what you do to define a transaction we

need to use the class

transaction I need to provide here a

document and the name of the change this

name is going to be shown in the undo

menu let's let's go to rename views and

sometimes it also might be a good idea

to put here some kind of prefix like e

if or maybe Pi so you know that it's

your Custom Tool

now we also need to Define here a

variable let's set T to equal

transaction and then we need to start

and we need to commit our

transactions let's also add here a few

icons and in here we're going to write

start transaction to make changes in the

project now we need to use this kind of

start and commit statements and we need

to put all our changes in between so

only if you're going to say for example

view name equals new name it's only

going to work if it's going to be

between start and commit and if you're

going to take it outside of it then

you're going to get an error that you

need a transaction to make it work all

right I'm going to remove it for

now and also a big note don't worry if

you make any changes between your start

and commit because it will be just roll

back which means just cancelled and

nothing will happen to your project so

whenever you have any issues you're

going to see the red text and usually

even your RIT won't crash you're just

going to see the message what's going

wrong and it's going to be canceled all

right we prepared our transaction now we

need to write for view in our selected

views and here two

things first of all we need to create

new view

name and then we need to rename our

views and also as you remember we need

to ensure that we have a unique view

name now to create a view name it's very

simple because we can read the existing

Name by using view name we're going to

write here old name equals view name now

the new name is going to be be our old

name we're going to write here replace

then we take our keyword for the find

keyword for the

replace and if you also work with suffix

and prefix we're just going to add it in

the end or we're going to add it in the

front and that's how we're going to

create a new name but we still don't

know if this name is going to be unique

enough and we're going to do this while

we are renaming cuz in here we're going

to set for example VI name equals new

name cuz this is a writable property and

we can see it in documentation right

there there it says get and set and set

means that we can write it like this I'm

going to assign a name if it's a unique

name it's going to work just fine but if

it's not we're going to get an error and

that's not good so for that we want to

use try and accept statements just to

catch our

errors and the way we're going to also

handle it I'm going to create here for I

in range of 20 so I'm going to give 20

tries to rename my view and every time

that I fail I'm going to do something

with a new name I'm going to write here

new name equals I'm going to keep adding

the star symbol in the end so for

example if you already have a view name

called floor plan it'll try to add one

star then the second the third and so on

so on so on until it reaches the

20 and the reason also I use the full

Loops cuz if we're going to use the

while loop and we forget to write The

Brak statements you're going to crash

your rabit cuz you're going to create an

infinite Loop and you cannot really

Escape that so therefore highly

recommend you to stick to the follow

Loops make here some kind of crazy

number and it's going to be still quick

to wait 200 times instead of waiting

this infinite Loop which never

ends all right and I think that we have

everything that we need and now let's

quickly recap what did we do so first of

all we select our views we either select

them in a project browser or we prompt

user to select by using p RIT forms

select views then we ensure that we have

some views before we're going to go any

further then we're going to Define our

renaming rules we're going to find our

floor plan we're going to replace it

with level just to make sure let's

actually make it EF level

in the prefix I'm going to add pre and

in the suix we're going to add maybe

something like

suf then we're going to start a

transaction and we're going to iterate

through all the selected views we need

to get our old name and we need to

Define our new name then we're going to

rename all of the views and then

eventually when it happens what's

important is that you make here a break

statement and before that we can also

make some print statement for example it

was this and it became this and let's

assign it this was old name and this is

our new name also I forgot to remove the

zero I don't want a 200 and again this

break statement if you don't do this

still going to work just going to kind

of rename it 20 times instead of one but

if you're going to put it here it's

going to stop executing this full loop

the moment is going to rename this view

So This is highly recommended to use The

Brak statement all right and in the end

we're going to write something like done

just so users know that we finished

renaming our views and maybe let's also

print 50 dashes

all right this is the code and you can

see it's not that complicated yes you do

need to know how to get your selections

what kind of forms available in py RIT

how to create transaction how to rename

it but this is things that you pick up

really quick and when you're going to

create your next tool you already know

about all of these Concepts you're just

going to have a look here and you're

easily going to replicate it now let's

go to ravit and see first of all I'm

going to select a few views like this in

my project browser and I'm going to

click on rename views and the moment I

do this you can see that they all added

the prefix suffix and floor plan was

replaced with the EF level and here are

the results this is what it was before

this is what happened after that and

listen guys understand that this is not

the most userfriendly experience right

to open your code change something here

most of you users will never do that I

know that for a fact instead of that I'm

going to put here like 2 a and this was

our version for the

development and now here I'm going to

create version 2 b

and I'm going to past snipp it right

here if you're going to write in Google

RPV Flex form eventually you're going to

end up on this website and in there you

have a very good example of how to

create custom forms first of all we need

to define components and you can see I

have a bunch of different labels right

here with the names and this is going to

be just shown as a text we're going to

see in the form prefix find replace and

so on and we're going to Define text

boxes this is where users can write

something and we're going to give names

to these text boxes so later on we can

actually get the values so we're going

to create a form we're going to show it

to the user then user going to interact

with it and we will be able to get the

values from the form and this is going

to be just a

dictionary so therefore we can get all

the values from dictionaries like this

and you can see all the keys we Define

them right here for the text boxes now I

think everything is exactly like I

wanted let's close this click on this button

button

again I'm going to select all of my views

views

click on select and now I get this form

as a prefix I'm just going to write ABC

and a Dash then in defined I'm actually

going to be looking for the EF with a

dash and I'm going to replace it with

nothing I just want to get rid of this

EF and in the suffix we're not going to

put anything and now we're going to

click on rename views and you can see

here are the print statements and All My

Views I changed I have my abc prefix EF

is gone and everything happened exactly

like I wanted all right then

congratulations now you know how to

create new Tools in pirate and it's just

the beginning as you will discover many

ideas that will help you in your daily

work start small and focus on quantity

over quality at first and over time

you'll create so many different tools

and have so much code examples that

creating new tools will be so much

easier in my case for example I can

create new tools where I copy paste more

than 80% of the code from previous tools

because I have so many examples already

and so will you I want to wish you keep

creating more cool tools and happy

coding and also I would like to ask you

for a favor if you've enjoyed my EFI

ravit starter kit it would make my day

if you would leave me a testimonial this

will help me promote this free stter kit

to even more people and motivate others

to give it a try and also I'll provide

you a nice reward if you decide to make

video testimonials so it's a win-win

situation you can leave this testimonial

by clicking here on leave a review or

going straight to this website and here

you can create your testimonial it's

100% appreciated and 0% % expected enjoy

your free pit starter kit and happy

coding it's 100% appreciated and 0%

expected enjoy this EF starter kit and

my name is Eric Fritz and I'll wish you

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คำบรรยาย YouTube:Your First pyRevit Button: An Easy Step-by-Step Tutorial [EP. 6/10]