Python: Add and remove attribute in a given class
Python Class ( Basic ): Exercise-10 with Solution
Write a Python class named Student with two attributes student_id, student_name. Add a new attribute student_class and display the entire attribute and their values of the said class. Now remove the student_name attribute and display the entire attribute with values.
Sample Solution:
Python Code:
class Student:
student_id = 'V10'
student_name = 'Jacqueline Barnett'
print("Original attributes and their values of the Student class:")
for attr, value in Student.__dict__.items():
if not attr.startswith('_'):
print(f'{attr} -> {value}')
print("\nAfter adding the student_class, attributes and their values with the said class:")
Student.student_class = 'V'
for attr, value in Student.__dict__.items():
if not attr.startswith('_'):
print(f'{attr} -> {value}')
print("\nAfter removing the student_name, attributes and their values from the said class:")
del Student.student_name
#delattr(Student, 'student_name')
for attr, value in Student.__dict__.items():
if not attr.startswith('_'):
print(f'{attr} -> {value}')
Sample Output:
Original attributes and their values of the Student class: student_id -> V10 student_name -> Jacqueline Barnett After adding the student_class, attributes and their values with the said class: student_id -> V10 student_name -> Jacqueline Barnett student_class -> V After removing the student_name, attributes and their values from the said class: student_id -> V10 student_class -> V
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Previous: Write a Python class named Student with two attributes student_name, marks. Modify the attribute values of the said class and print the original and modified values of the said attributes.
Next: Write a Python class named Student with two attributes student_id, student_name. Add a new attribute student_class. Create a function to display the entire attribute and their values in Student class.
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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
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