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Pandas Datetime: Get the current date, oldest date and number of days between Current date and oldest date of Ufo dataset

Pandas Datetime: Exercise-3 with Solution

Write a Pandas program to get the current date, oldest date and number of days between Current date and oldest date of Ufo dataset.

Sample Solution :

Python Code :

import pandas as pd
df = pd.read_csv(r'ufo.csv')
df['Date_time'] = df['Date_time'].astype('datetime64[ns]')
print("Original Dataframe:")
print(df.head())
print("\nCurrent date of Ufo dataset:")
print(df.Date_time.max())
print("\nOldest date of Ufo dataset:")
print(df.Date_time.min())
print("\nNumber of days between Current date and oldest date of Ufo dataset:")
print((df.Date_time.max() - df.Date_time.min()).days)

Sample Output:

Original Dataframe:
            Date_time                  city     ...       latitude   longitude
0 1910-06-01 15:00:00           wills point     ...      32.709167  -96.008056
1 1920-06-11 21:00:00                cicero     ...      40.123889  -86.013333
2 1929-07-05 14:00:00  buchanan  (or burns)     ...      43.642500 -118.627500
3 1931-06-01 13:00:00               abilene     ...      38.917222  -97.213611
4 1939-06-01 20:00:00              waterloo     ...      34.918056  -88.064167

[5 rows x 11 columns]

Current date of Ufo dataset:
2004-12-08 05:30:00

Oldest date of Ufo dataset:
1910-06-01 15:00:00

Number of days between Current date and oldest date of Ufo dataset:
34523

Python Code Editor:

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Previous: Write a Pandas program to calculate all the sighting days of the unidentified flying object (ufo) from current date.
Next: Write a Pandas program to get all the sighting days of the unidentified flying object (ufo) which are less than or equal to 40 years (365*40 days).

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Python: Tips of the Day

F strings:

It is a common practice to add variables inside strings. F strings are by far the coolest way of doing it. To appreciate the f strings more, let's first perform the operation with the format function.

name = 'Owen'
age = 25
print("{} is {} years old".format(name, age))

Output:

Owen is 25 years old

We specify the variables that go inside the curly braces by using the format function at the end. F strings allow for specifying the variables inside the string.

name = 'Owen'
age = 25
print(f"{name} is {age} years old")

Output:

Owen is 25 years old

F strings are easier to follow and type. Moreover, they make the code more readable.

A, B, C = {2, 4, 6}
print(A, B, C)
A, B, C = ['p', 'q', 'r']
print(A, B, C)

Output:

2 4 6
p q r