Python: Print subject name and marks in order of its first occurrence

Last update on July 05 2025 07:25:53 (UTC/GMT +8 hours)

6. Accept subjects, names, and marks, then print in order

Write a Python program that accepts the number of subjects, subject names and marks. Input the number of subjects and then the subject name and marks separated by a space on the next line. Print the subject name and marks in order of appearance.

Sample Solution:

Python Code:

# Import the collections and re modules
import collections, re

# Prompt the user to input the number of subjects
n = int(input("Number of subjects: "))

# Create an ordered dictionary to store subject names and their respective marks
item_order = collections.OrderedDict()

# Loop 'n' times to gather subject names and marks
for i in range(n):
   # Prompt the user to input subject name and marks, split the input into subject_name and item_price
   sub_marks_list = re.split(r'(\d+)$', input("Input Subject name and marks: ").strip())
   subject_name = sub_marks_list[0]
   item_price = int(sub_marks_list[1])
   
   # Check if the subject_name is already in the item_order dictionary
   if subject_name not in item_order:
       # If not, add a new entry with the subject_name as the key and item_price as the value
       item_order[subject_name] = item_price
   else:
       # If it already exists, update the item_order dictionary with the new item_price
       item_order[subject_name] = item_order[subject_name] + item_price

# Iterate over the ordered dictionary and print subject names and their respective marks
for i in item_order:
   print(i + str(item_order[i]))

Sample Output:

Powered by 
Number of subjects:  3
Input Subject name and marks:  Bengali 58
Input Subject name and marks:  English 62
Input Subject name and marks:  Math 68
Bengali 58
English 62
Math 68 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to prompt the user for a number of subjects, then read subject names and marks, and finally print them as a formatted table.
• Write a Python program to store subject names and marks in a dictionary and then print each subject with its mark in order of input.
• Write a Python program to use list comprehension to collect subject-mark pairs and display them sorted by subject name.
• Write a Python program to implement a function that reads subjects and marks and returns a list of tuples preserving the order of input.

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