Pandas plot - Range

The graphs and data in your question don't match, but is the following what you want to do based on the data? We have not implemented adding the circles or anything else. Please try and see.

import pandas as pd

data = {'begin': ['10', '15','17','25','7','8','16'],
        'end': ['15', '20', '20', '30', '15','10','19' ],
       'duration' :['5','5','3','5','8','2','3']}

df = pd.DataFrame(data)

import matplotlib.pyplot as plt
import matplotlib.patches as patches

fig = plt.figure(figsize=(4,3),dpi=144)
ax = fig.add_subplot(111)

for index,row in df.iterrows():
#     print(index,row[0],row[1])
    r = patches.Rectangle(xy=(int(row[0]),int(index+1)), width=int(row[2]), height=0.4, ec='k', fc='k', fill=True)
    ax.add_artist(r)

ax.set_ylim(0,10)
ax.set_xlim(0,35)