From 6353ae736dc3cdf2c3ca5afbaa77ce747bbe8a78 Mon Sep 17 00:00:00 2001
From: martian0x80 <26498920+martian0x80@users.noreply.github.com>
Date: Sat, 29 Jun 2024 00:26:24 +0530
Subject: [PATCH 1/3] fix: evaluate HOST, PORT, and PROXY when Dash.run is
 invoked, fixes #2902

---
 dash/dash.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/dash/dash.py b/dash/dash.py
index b17ef80c96..1ec34023fc 100644
--- a/dash/dash.py
+++ b/dash/dash.py
@@ -2109,6 +2109,12 @@ def run(
             dev_tools_prune_errors,
         )
 
+        # Evaluate the env variables at runtime
+
+        host = os.getenv("HOST", host)
+        port = os.getenv("PORT", port)
+        proxy = os.getenv("DASH_PROXY", proxy)
+
         # Verify port value
         try:
             port = int(port)

From 5e1786bd617bdbcfcc99928081035f45020b0aab Mon Sep 17 00:00:00 2001
From: martian0x80 <26498920+martian0x80@users.noreply.github.com>
Date: Wed, 3 Jul 2024 14:59:31 +0530
Subject: [PATCH 2/3] chore: assign None to host, port, proxy parameters

---
 dash/dash.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/dash/dash.py b/dash/dash.py
index 1ec34023fc..f9cc2139f3 100644
--- a/dash/dash.py
+++ b/dash/dash.py
@@ -1981,9 +1981,9 @@ def delete_resource(resources):
 
     def run(
         self,
-        host=os.getenv("HOST", "127.0.0.1"),
-        port=os.getenv("PORT", "8050"),
-        proxy=os.getenv("DASH_PROXY", None),
+        host=None,
+        port=None,
+        proxy=None,
         debug=None,
         jupyter_mode: JupyterDisplayMode = None,
         jupyter_width="100%",

From 8adf717c5a2f122d6d5dd93ef8d9a945463df65c Mon Sep 17 00:00:00 2001
From: martian0x80 <26498920+martian0x80@users.noreply.github.com>
Date: Wed, 3 Jul 2024 20:09:32 +0530
Subject: [PATCH 3/3] chore: assign default params to host, port parameters in
 Dash.run()

---
 CHANGELOG.md | 1 +
 dash/dash.py | 4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e50c9449bc..1d5986c457 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -13,6 +13,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 - [#2898](https://github.com/plotly/dash/pull/2898) Fix error thrown when using non-existent components in callback running keyword. Fixes [#2897](https://github.com/plotly/dash/issues/2897).
 - [#2892](https://github.com/plotly/dash/pull/2860) Fix ensures dcc.Dropdown menu maxHeight option works with Datatable. Fixes [#2529](https://github.com/plotly/dash/issues/2529) [#2225](https://github.com/plotly/dash/issues/2225)
 - [#2896](https://github.com/plotly/dash/pull/2896) The tabIndex parameter of Div can accept number or string type. Fixes [#2891](https://github.com/plotly/dash/issues/2891)
+- [#2908](https://github.com/plotly/dash/pull/2908) Fix when environment variables are ignored by Dash.run() at runtime. Fixes [#2902](https://github.com/plotly/dash/issues/2902)
 
 ## [2.17.1] - 2024-06-12
 
diff --git a/dash/dash.py b/dash/dash.py
index f9cc2139f3..3e5e4e4170 100644
--- a/dash/dash.py
+++ b/dash/dash.py
@@ -1981,8 +1981,8 @@ def delete_resource(resources):
 
     def run(
         self,
-        host=None,
-        port=None,
+        host="127.0.0.1",
+        port="8050",
         proxy=None,
         debug=None,
         jupyter_mode: JupyterDisplayMode = None,