From 9b35b3f7cfed1c878a707df3198caf8b784b70be Mon Sep 17 00:00:00 2001
From: Real Python Bot <42617967+realpython-bot@users.noreply.github.com>
Date: Sun, 1 Nov 2026 06:06:13 +0000
Subject: [PATCH] Sync simulation-with-simpy with the maintenance update of
 SimPy: Simulating Real-World Processes With Python

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 simulation-with-simpy/README.md        | 12 ++++++++++--
 simulation-with-simpy/requirements.txt |  1 +
 simulation-with-simpy/simulate.py      | 10 +++++-----
 3 files changed, 16 insertions(+), 7 deletions(-)
 create mode 100644 simulation-with-simpy/requirements.txt

diff --git a/simulation-with-simpy/README.md b/simulation-with-simpy/README.md
index 9af4d20cfc..3541ab01be 100644
--- a/simulation-with-simpy/README.md
+++ b/simulation-with-simpy/README.md
@@ -1,6 +1,14 @@
 # Simulating Real-World Processes With SimPy
 
-Corresponding code for ["Simulating Real-World Processes With SimPy."](https://realpython.com/simulation-with-simpy/)
+Corresponding code for ["SimPy: Simulating Real-World Processes With Python."](https://realpython.com/simpy-simulating-with-python/)
+
+## Requirements
+
+The script runs on Python 3.8 or later. Install SimPy from `requirements.txt`:
+
+```console
+$ python -m pip install -r requirements.txt
+```
 
 ## Running the Script
 
@@ -14,5 +22,5 @@ Input # of cashiers working: 1
 Input # of servers working: 1
 Input # of ushers working: 1
 Running simulation...
-The average wait time is 42 minutes and 26 seconds.
+The average wait time is 42 minutes and 53 seconds.
 ```
diff --git a/simulation-with-simpy/requirements.txt b/simulation-with-simpy/requirements.txt
new file mode 100644
index 0000000000..fcecd0a1c4
--- /dev/null
+++ b/simulation-with-simpy/requirements.txt
@@ -0,0 +1 @@
+simpy==4.1.2
diff --git a/simulation-with-simpy/simulate.py b/simulation-with-simpy/simulate.py
index 3a726775eb..751d0f319c 100644
--- a/simulation-with-simpy/simulate.py
+++ b/simulation-with-simpy/simulate.py
@@ -1,9 +1,9 @@
-"""Companion code to https://realpython.com/simulation-with-simpy/
+"""Companion code to https://realpython.com/simpy-simulating-with-python/
 
-'Simulating Real-World Processes With SimPy'
+'SimPy: Simulating Real-World Processes With Python'
 
-Python version: 3.7.3
-SimPy version: 3.0.11
+Python version: 3.15
+SimPy version: 4.1.2
 """
 
 import random
@@ -82,7 +82,7 @@ def get_user_input():
         params = [int(x) for x in params]
     else:
         print(
-            "Could not parse input. Simulation will use default values:",
+            "Could not parse input. The simulation will use default values:",
             "\n1 cashier, 1 server, 1 usher.",
         )
         params = [1, 1, 1]