Python Pandas 面接の質問と回答

質問 21. How do you sort a Pandas DataFrame by a specific column?

Use the sort_values function. df.sort_values(by='column')

質問 22. What is the purpose of the to_csv function in Pandas?

to_csv is used to write a DataFrame to a CSV file.

Example:

df.to_csv('output.csv', index=False)

質問 23. Explain the use of the cut function in Pandas.

cut is used to segment and sort data values into bins.

Example:

pd.cut(df['column'], bins=[0, 25, 50, 75, 100])

質問 24. How do you check for the existence of a specific value in a Pandas DataFrame?

Use the isin function. df['column'].isin([value])

質問 25. What is the purpose of the read_csv function in Pandas?

read_csv is used to read data from a CSV file into a DataFrame.

Example:

df = pd.read_csv('file.csv')