Improved plotter script

bettwaage-plotter/main.py

@@ -1,19 +1,31 @@
 import requests
 import matplotlib.pyplot as plt
-import numpy as np
 from datetime import datetime
+import json
 
+
+file_path = "history.json"
 history_url = "http://192.168.178.84:9587/bettwaage/history"
 
-data = requests.get(history_url)
+convert_time_to_seconds = True
 
-data = data.json()
+# Script
+data = None
 
+if file_path is None:
+    data = requests.get(history_url)
+    data = data.json()
+else:
+    with open(file_path, "r") as fp:
+        data = json.load(fp)
 
 # make data
-x = [datetime.strptime(d["timestamp"], "%Y-%m-%d %H:%M:%S.%f") for d in data]
+x = [d["timestamp"] for d in data]
-max_time = max(x)
+x = [datetime.strptime(d, "%Y-%m-%d %H:%M:%S.%f") for d in x]
-x = [(max_time - d).total_seconds() for d in x]
+
+if convert_time_to_seconds:
+    max_time = max(x)
+    x = [(d - max_time).total_seconds() for d in x]
 
 total = [d["total"] for d in data]
 tl = [d["tl"] for d in data]
@@ -24,19 +36,15 @@ br = [d["br"] for d in data]
 
 fig, ax1 = plt.subplots()
 
-color = "tab:blue"
+ax1.set_xlabel("Time (s)")
-ax1.set_xlabel("time (s)")
+ax1.set_ylabel("Weight (kg)")
-ax1.set_ylabel("Total", color=color)
-ax1.plot(x, total, color=color)
 
-ax2 = ax1.twinx()  # instantiate a second axes that shares the same x-axis
+line_total = ax1.plot(x, total, color="tab:blue")
+line_tl = ax1.plot(x, tl, color="tab:red")
+line_tr = ax1.plot(x, tr, color="tab:green")
+line_bl = ax1.plot(x, bl, color="tab:orange")
+line_br = ax1.plot(x, br, color="tab:purple")
 
-color = "tab:blue"
+ax1.legend(["Total", "Top Left", "Top Right", "Bottom Left", "Bottom Right"])
-ax2.set_ylabel("Legs", color=color)  # we already handled the x-label with ax1
-ax2.plot(x, tl, color="tab:red")
-ax2.plot(x, tr, color="tab:green")
-ax2.plot(x, bl, color="tab:purple")
-ax2.plot(x, br, color="tab:orange")
 
-fig.tight_layout()  # otherwise the right y-label is slightly clipped
 plt.show()