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

Python map: Exercise-9 with Solution

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

Sample Solution:

Python Code :

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("Original data:")
print(student_data)
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("\nStudent name:")
print(students_data_name)
print("Student name:")
print(students_data_dob)
print("Student weight:")
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]

Python Code Editor:

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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.

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m