Question

Surya is a manager working in a recruitment agency. He needs to manage the records of various candidates. For this, he wants the following information of each candidate to be stored: 

- Candidate_ID – integer
- Candidate_Name – string
- Designation – string
- Experience – float

You, as a programmer of the company, have been assigned to do this job for Surya.

1. Write a function to input the data of a candidate and append it in a binary file.
2. Write a function to update the data of candidates whose experience is more than 10 years and change their designation to "Senior Manager".
3. Write a function to read the data from the binary file and display the data of all those candidates who are not "Senior Manager".

Answer 1

1. import pickle 
   
   def input_candidates():
      candidates = []
      n = int(input("Enter the number of candidates you want to add: "))
      for i in range(n):
         candidate_id = int(input("Enter Candidate ID: "))
         candidate_name = input("Enter Candidate Name: ")
         designation = input("Enter Designation: ")
         experience = float(input("Enter Experience (in years): "))
         candidates.append([candidate_id, candidate_name, designation, 
   experience])
      return candidates
   candidates_list = input_candidates()
   
   def append_candidate_data(candidates):
      with open('candidates.bin', 'ab') as file:
       for candidate in candidates:
          pickle.dump(candidate, file)
      print("Candidate data appended successfully.")
   append_candidate_data(candidates_list)

2. import pickle
   
   def update_senior_manager():
      updated_candidates = []
      try:
        with open('candidates.bin', 'rb') as file:
          while True:
            try:
              candidate = pickle.load(file)
              if candidate[3] > 10: # If experience > 10 years
                 candidate[2] = 'Senior Manager'
              updated_candidates.append(candidate)
           except EOFError:
           break # End of file reached
      except FileNotFoundError:
        print("No candidate data found. Please add candidates first.")
        return
   
      with open('candidates.bin', 'wb') as file:
        for candidate in updated_candidates:
          pickle.dump(candidate, file)
   
      print("Candidates updated to Senior Manager where applicable.")
   update_senior_manager()

3. import pickle
   def display_non_senior_managers():
       try:
          with open('candidates.bin', 'rb') as file:
             while True:
               try:
                 candidate = pickle.load(file)
                 if candidate[2] != 'Senior Manager': # Check if not Senior 
   Manager
                print(f"Candidate ID: {candidate[0]}")
                print(f"Candidate Name: {candidate[1]}")
                print(f"Designation: {candidate[2]}")
                print(f"Experience: {candidate[3]}")
                print("--------------------")
    except EOFError:
               break # End of file reached
   except FileNotFoundError:
       print("No candidate data found. Please add candidates first.")
   
   display_non_senior_managers()