Get it to work in venv

ecar.py

@@ -1,3 +1,5 @@
+import matplotlib
+matplotlib.use('Qt5Agg')  # or 'Qt5Agg', depending on your setup
 import matplotlib.pyplot as plt
 import numpy as np
 import json

requirements.txt

@@ -0,0 +1,14 @@
+contourpy==1.3.0
+cycler==0.12.1
+fonttools==4.54.1
+kiwisolver==1.4.7
+matplotlib==3.9.2
+numpy==2.1.2
+packaging==24.1
+pillow==11.0.0
+pyparsing==3.2.0
+PyQt5==5.15.11
+PyQt5-Qt5==5.15.15
+PyQt5_sip==12.15.0
+python-dateutil==2.9.0.post0
+six==1.16.0