Write a program in Python to print the first and last three days from a given time series data

Assume, you have time series and the result for the first and last three days from the given series as,

first three days: 2020-01-01    Chennai 2020-01-03    Delhi Freq: 2D, dtype: object last three days: 2020-01-07    Pune 2020-01-09    Kolkata Freq: 2D, dtype: object

To solve this, we will follow the steps given below −

Solution

• Define a series and store it as data.

• Apply pd.date_range() function inside start date as ‘2020-01-01’ and periods = 5, freq =’2D’ and save it as time_series

time_series = pd.date_range('2020-01-01', periods = 5, freq ='2D')

• Set date.index = time_series

• Print the first three days using data.first(’3D’) and save it as first_day

first_day = data.first('3D')

• Print the last three days using data.last(’3D’) and save it as last_day

last_day = data.last('3D')

Example

Let’s check the following code to get a better understanding −

import pandas as pd data = pd.Series(['Chennai', 'Delhi', 'Mumbai', 'Pune', 'Kolkata']) time_series = pd.date_range('2020-01-01', periods = 5, freq ='2D') data.index = time_series print("time series:\n",data) first_day = data.first('3D') print("first three days:\n",first_day) last_day = data.last('3D') print("last three days:\n",last_day)

Output

time series: 2020-01-01    Chennai 2020-01-03    Delhi 2020-01-05    Mumbai 2020-01-07    Pune 2020-01-09    Kolkata Freq: 2D, dtype: object first three days: 2020-01-01    Chennai 2020-01-03    Delhi Freq: 2D, dtype: object last three days: 2020-01-07    Pune 2020-01-09    Kolkata Freq: 2D, dtype: object