Sync simulation-with-simpy with the maintenance update of SimPy: Simulating Real-World Processes With Python (#932)

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

Author: realpython-bot

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.
 ```

simulation-with-simpy/requirements.txt

@@ -0,0 +1 @@
+simpy==4.1.2

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]