import sqlite3, pandas, matplotlib
matplotlib.use('tkAgg') 
import matplotlib.pyplot as plt

conn = sqlite3.connect("bandwidth.db")

sql = """SELECT times, ping, download, upload FROM bandwidth"""

data = pandas.read_sql(sql, conn)

plt.plot(data.times,data.ping, label = "Ping", )
plt.plot(data.times,data.download, label = "Download")
plt.plot(data.times,data.upload, label = "Upload")
plt.legend()
plt.title("Bandwidth")
plt.show()