Python: Create a new list taking specific elements from a tuple and convert a string value to integer

Last update on April 22 2025 12:52:47 (UTC/GMT +8 hours)

9. Tuple Elements and String to Int Map

Write a Python program to create a new list taking specific elements from a tuple and convert a string value to an integer.

Sample Solution:

Python Code :

# Create a list of tuples named 'student_data' containing student information
student_data  = [('Alberto Franco','15/05/2002','35kg'), ('Gino Mcneill','17/05/2002','37kg'), ('Ryan Parkes','16/02/1999', '39kg'), ('Eesha Hinton','25/09/1998', '35kg')]

# Print the original data of student information
print("Original data:")
print(student_data)

# Use the map function and lambda expressions to extract student names, dates of birth, and weights
# and create new lists 'students_data_name', 'students_data_dob', and 'students_data_weight'
students_data_name = list(map(lambda x: x[0], student_data))
students_data_dob = list(map(lambda x: x[1], student_data))
students_data_weight = list(map(lambda x: int(x[2][:-2]), student_data))

# Print a message indicating the operation to be performed
print("\nStudent name:")

# Print the result of the map operation for student names
print(students_data_name)

# Print a message indicating the operation to be performed
print("Student date of birth:")

# Print the result of the map operation for student dates of birth
print(students_data_dob)

# Print a message indicating the operation to be performed
print("Student weight:")

# Print the result of the map operation for student weights
print(students_data_weight)

Sample Output:

Original data:
[('Alberto Franco', '15/05/2002', '35kg'), ('Gino Mcneill', '17/05/2002', '37kg'), ('Ryan Parkes', '16/02/1999', '39kg'), ('Eesha Hinton', '25/09/1998', '35kg')]

Student name:
['Alberto Franco', 'Gino Mcneill', 'Ryan Parkes', 'Eesha Hinton']
Student name:
['15/05/2002', '17/05/2002', '16/02/1999', '25/09/1998']
Student weight:
[35, 37, 39, 35]

For more Practice: Solve these Related Problems:

Write a Python program to extract every second element from a tuple of mixed types and convert any numeric strings to integers using map.
Write a Python program to select elements at prime indices from a tuple and convert numeric strings to integers using map.
Write a Python program to filter elements from a tuple that are digit strings and convert them to integers using map.
Write a Python program to map a function that attempts to convert each element in a tuple to an integer if possible, leaving others unchanged.

Go to:

Previous: Write a Python program to convert a given list of integers and a tuple of integers in a list of strings.
Next: Write a Python program to compute the square of first N Fibonacci numbers, using map function and generate a list of the numbers.

Python Code Editor:

Have another way to solve this solution? Contribute your code (and comments) through Disqus.