Where's the endless loop?

[deanhystad]

You are measuring how long it takes the for loop to do 10 plots.

Why are you doing this:

plt.bar(key,my_dict[key])

I assume that plt is mathplotlib.pyplot and that you want to plot df['DTE'] counts for df['DTE'] < 251. What your code does is make a bunch of bar charts where each chart has 1 bar.

If you want counts for df['DTE'] < 251 let pandas do the work for you. In the example below I plot the count of df['DTE'] for DET values in the range 20 to 50.

import random
import matplotlib.pyplot as plt
import pandas as pd
df = pd.DataFrame({'DTE':[random.randint(1,101) for _ in range(1000)]})
counts = df.loc[(df['DTE'] >= 20) & (df['DTE'] <= 50)].value_counts().sort_index(ascending=True)
counts.plot(kind='bar')
plt.show()