Python Coding Challange - Question With Answer

                                                                                                                                                                    

data = {'A': [1, 2], 'B': [3, 4]}
df = pd.DataFrame(data)
print(df.shape)

Explanation:

data = {'A': [1, 2], 'B': [3, 4]}

1. A dictionary named data is created with two key-value pairs:
   • • Key 'A' maps to the list [1, 2]
     • Key 'B' maps to the list [3, 4]
   • This dictionary represents column data for a table:

     
     A  B
     1  3
     2  4

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2. df = pd.DataFrame(data)
   • A Pandas DataFrame is created from the dictionary.
   • Each key in the dictionary ('A' and 'B') becomes a column in the DataFrame.
   • The values in the lists ([1, 2] for 'A' and [3, 4] for 'B') become the rows under the respective columns.
   • The resulting DataFrame looks like this:

     
        A  B
     0   1  3
     1   2  4

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3. print(df.shape)
   • The shape attribute of a DataFrame returns a tuple representing its dimensions:
     (number_of_rows, number_of_columns)
   • For this DataFrame:
     • Number of rows = 2 (index 0 and 1)
     • Number of columns = 2 ('A' and 'B')
   • df.shape returns (2, 2).

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Final Output:

(2, 2)

This tells us the DataFrame has 2 rows and 2 columns.