In Python, when open() method is applied in ‘<a>' mode, a file is opened in append mode. If the file does not exist, then :
- The system will generate an error message
- The system will terminate
- The system willgenerate a new file
- The system will generate an error message and terminate
The Correct Option is C
Solution and Explanation
Top Questions on Python Libraries
Consider the DataFrame Doctor shown below:
Write suitable Python statements for the following:
(i) To print the last three rows of the DataFrame Doctor.
(ii) To display the names of all doctors.
(iii) To add a new column 'Discount' with value of 200 for all doctors.
(iv) To display rows with index 2 and 3.
(v) To delete the column 'Department'.
- CBSE CLASS XII - 2025
- Informatics Practice
- Python Libraries
Gurkirat has to fill in the blanks in the given Python program that generates a line plot as shown below. The given line plot represents the temperature (in degree Celsius) over five days as given in the table:
Write the missing statements according to the given specifications:
(i) Write the suitable code to import the required module in the blank space in the line marked as Statement-1.
(ii) Fill in the blank in Statement-2 with a suitable Python function name to create a line plot.
(iii) Refer to the graph shown and fill in the blank in Statement-3 to display the appropriate label for x-axis.
(iv) Refer to the graph shown and fill in the blank in Statement-4 to display the suitable chart title.
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- Informatics Practice
- Python Libraries
- Write a Python program to create a Pandas Series as shown below from an ndarray containing the numbers 10, 20, 30, 40, 50 with corresponding indices 'A', 'B', 'C', 'D', 'E'.
Expected Series:
A 10 B 20 C 30 D 40 E 50 dtype: int64
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- Informatics Practice
- Python Libraries
- Write a Python program to create the following DataFrame using a Dictionary of Series:
Expected DataFrame:
City State 0 Mumbai Maharashtra 1 Dehradun Uttarakhand 2 Bengaluru Karnataka 3 Hyderabad Telangana
- CBSE CLASS XII - 2025
- Informatics Practice
- Python Libraries
- Rohit is trying to create a Pandas Series from scalar values. His code has some mistakes. Rewrite the correct code and mention the corrections made.
Given code with mistakes:
import pandas data = [50, 15, 40] series = pd.series(data, Index=['x', 'y', 'z']) Print(series)
- CBSE CLASS XII - 2025
- Informatics Practice
- Python Libraries
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\(2, 6, 12, 20, 30, \ ?\)- CUET (UG) - 2025
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