Python Coding Challenge - Question with Answer (ID -300326)

 

Explanation:

🔹 1. Importing pandas (implicit step)

Before this code runs, you usually need:

import pandas as pd

✅ Explanation:

pandas is a powerful Python library used for data manipulation.

pd is just an alias (short name) for pandas to make typing easier.

🔹 2. Creating the DataFrame

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

✅ Explanation:

pd.DataFrame() creates a table-like structure (rows and columns).

The input is a dictionary:

'A': [1, 2] → Column A with values 1 and 2

'B': [3, 4] → Column B with values 3 and 4

📊 Resulting DataFrame:

index A B

0 1 3

1 2 4

🧠 Key Points:

Columns are A and B

Default index starts from 0

🔹 3. Accessing Data using .loc

print(df.loc[0, 'A'])

✅ Explanation:

.loc[] is used to access data by label (row index + column name)

📌 Breakdown:

0 → Row index

'A' → Column name

So:

👉 df.loc[0, 'A'] means

➡️ “Get value from row 0 and column A”

🔹 4. Output

1