Selecting the first and last 7 rows in a Pandas DataFrame

Python Pandas Numpy: Exercise-4 with Solution

Select the first and last 7 rows of a Pandas DataFrame.

Sample Solution:

Python Code:

import pandas as pd

# Create a sample DataFrame
data = {'Name': ['Teodosija', 'Sutton', 'Taneli', 'Ravshan', 'Ross', 'Alice', 'Bob', 'Charlie', 'David', 'Emily'],
        'Age': [26, 32, 25, 31, 28, 22, 35, 30, 40, 28],
        'Salary': [50000, 60000, 45000, 70000, 55000, 60000, 70000, 55000, 75000, 65000]}

df = pd.DataFrame(data)

# Select the first 7 rows
selected_rows = pd.concat([df.head(7)])

print("First 7 rows:")
# Display the selected rows
print(selected_rows)

# Select the first and last 7 rows
selected_rows = pd.concat([df.tail(7)])
print("\nLast 7 rows:")
# Display the selected rows
print(selected_rows)

Output:

First 7 rows:
   Name        Age  Salary
0  Teodosija   26   50000
1     Sutton   32   60000
2     Taneli   25   45000
3    Ravshan   31   70000
4       Ross   28   55000
5      Alice   22   60000
6        Bob   35   70000

Last 7 rows:
      Name  Age  Salary
3  Ravshan   31   70000
4     Ross   28   55000
5    Alice   22   60000
6      Bob   35   70000
7  Charlie   30   55000
8    David   40   75000
9    Emily   28   65000

Explanation:

• Importing Pandas:
  import pandas as pd
  Imports the Pandas library and aliases it as "pd" for convenience.
• Creating a Sample DataFrame:
  data = {'Name': ['Teodosija', 'Sutton', 'Taneli', 'Ravshan', 'Ross', 'Alice', 'Bob', 'Charlie', 'David', 'Emily'], 'Age': [26, 32, 25, 31, 28, 22, 35, 30, 40, 28], 'Salary': [50000, 60000, 45000, 70000, 55000, 60000, 70000, 55000, 75000, 65000]} df = pd.DataFrame(data)
  Creates a sample DataFrame (df) with columns 'Name', 'Age', and 'Salary'.
• Selecting the First 7 Rows:
  selected_rows = pd.concat([df.head(7)])
  Uses the head(7) method to select the first 7 rows of the DataFrame and stores it in selected_rows.
• Displaying the First 7 Rows:
  print("First 7 rows:") print(selected_rows)
  Prints a message and displays the selected rows to the console.
• Selecting the Last 7 Rows:
  selected_rows = pd.concat([df.tail(7)])
  Uses the tail(7) method to select the last 7 rows of the DataFrame and stores it in selected_rows.
• Displaying the Last 7 Rows:
  print("\nLast 7 rows:") print(selected_rows)
  Prints a message and displays the selected rows to the console.

Flowchart:

Python Code Editor:

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