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feat: Expose NoUpdate type#3369

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T4rk1n merged 5 commits intoplotly:devfrom
ytausch:expose-noupdate
Jul 17, 2025
Merged

feat: Expose NoUpdate type#3369
T4rk1n merged 5 commits intoplotly:devfrom
ytausch:expose-noupdate

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@ytausch ytausch commented Jul 15, 2025 •
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Closes #2800.

Contributor Checklist

  • I have broken down my PR scope into the following TODO tasks
    • expose dash.NoUpdate
  • I have run the tests locally and they passed. (refer to testing section in contributing)
  • I have added tests, or extended existing tests, to cover any new features or bugs fixed in this PR -> not needed

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  • I have added entry in the CHANGELOG.md
  • If this PR needs a follow-up in dash docs, community thread, I have mentioned the relevant URLS as follows
    • this GitHub #PR number updates the dash docs
    • here is the show and tell thread in Plotly Dash community

@ytausch ytausch marked this pull request as ready for review July 15, 2025 17:06
@gvwilson gvwilson added P1 needed for current cycle fix fixes something broken community community contribution labels Jul 15, 2025
T4rk1n
T4rk1n reviewed Jul 16, 2025
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T4rk1n requested changes Jul 16, 2025
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Maybe we should add obj is NoUpdate or ... in the conditions of NoUpdate.is_no_update if this is exposed so it could be used as is.

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ytausch commented Jul 16, 2025

Isn't this already the case? If you mean an isinstance check.

dash/dash/_no_update.py

Lines 1 to 9 in 1f4337a

class NoUpdate:
def to_plotly_json(self): # pylint: disable=no-self-use
return {"_dash_no_update": "_dash_no_update"}
@staticmethod
def is_no_update(obj):
return isinstance(obj, NoUpdate) or (
isinstance(obj, dict) and obj == {"_dash_no_update": "_dash_no_update"}
)

@ytausch ytausch requested a review from T4rk1n July 16, 2025 15:37
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ytausch commented Jul 16, 2025

Ah, you referred back to the original issue. I added the condition.

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T4rk1n reviewed Jul 16, 2025
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Looks good, just a formatting issue.

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T4rk1n approved these changes Jul 17, 2025
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💃 Thank you.

@T4rk1n T4rk1n merged commit bfca375 into plotly:dev Jul 17, 2025
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@ytausch ytausch deleted the expose-noupdate branch July 17, 2025 14:18
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@T4rk1n T4rk1n T4rk1n approved these changes

@ndrezn ndrezn Awaiting requested review from ndrezn ndrezn is a code owner

@gvwilson gvwilson Awaiting requested review from gvwilson

@emilykl emilykl Awaiting requested review from emilykl

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@ytausch @T4rk1n @gvwilson