# pandas4.py
import pandas as pd

weekly_data = {'day':['Monday','Tuesday', 'Wednesday', 'Thursday',
                      'Friday', 'Saturday', 'Sunday'],
                'temp':[40, 33, 42, 31, 41, 40, 30],
                'condition':['Sunny','Cloudy','Sunny','Rain','Sunny',
                        'Cloudy','Rain']
        }

df = pd.DataFrame(weekly_data)
df.index = ['MON', 'TUE','WED','THU','FRI','SAT','SUN']
df.loc['TST1'] = ['Test day 1', 50, 'NA']
df.loc[7] = ['Test day 2', 40, 'NA']

print(df)