0x09-python-everything_is_object

Python - Everything is object

• Projects done during my Full Stack Software Engineering studies at ALX Africa, a course offered by Holberton School.

Technologies

• Files written in vi, vim, and emacs editors.
• Files wriiten according to the betty coding style. Checked using betty-style.pl and betty-doc.pl.
• Files tested on Ubuntu 20.04 LTS using gcc.
• Python3.4 files

Files

• 0-answer.txt- What function would you use to print the type of an object?
• 1-answer.txt- How do you get the variable identifier (which is the memory address in the CPython implementation)?
• 2-answer.txt- In the following code, do a and b point to the same object? Answer with Yes or No:

>>> a = 89
>>> b = 100

• 3-answer.txt - In the following code, do a and b point to the same object? Answer with Yes or No.

>>> a = 89
>>> b = 89

• 4-answer.txt - In the following code, do a and b point to the same object? Answer with Yes or No.

>>> a = 89
>>> b = a

• 5-answer.txt - In the following code, do a and b point to the same object? Answer with Yes or No.

>>> a = 89
>>> b = a + 1

• 6-answer.txt - What do these 3 lines print?

>>> s1 = "Best School"
>>> s2 = s1
>>> print(s1 == s2)

• 7-answer.txt - What do these 3 lines print?

>>> s1 = "Best"
>>> s2 = s1
>>> print(s1 == s2)

• 8-answer.txt - What do these 3 lines print?

>>> s1 = "Best School"
>>> s2 = "Best School"
>>> print(s1 == s2)

• 9-answer.txt - What do these 3 lines print?

>>> s1 = "Best School"
>>> s2 = "Best School"
>>> print(s1 is s2)

• 10-answer.txt - What do these 3 lines print?

>>> l2 = [1, 2, 3]
>>> l2 = [1, 2, 3]
>>> print(l1 == l2)

• 11-answer.txt - What do these 3 lines print?

>>> l2 = [1, 2, 3]
>>> l2 = [1, 2, 3]
>>> print(l1 is l2)

• 12-answer.txt - What do these 3 lines print?

>>> l2 = [1, 2, 3]
>>> l2 = l1
>>> print(l1 == l2)

• 13-answer.txt - What do these 3 lines print?

>>> l2 = [1, 2, 3]
>>> l2 = l1
>>> print(l1 is l2)

• 14-answer.txt - What do this script print?

l1 = [1, 2, 3]
l2 = l1
l1.append(4)
print(l2)

• 15-answer.txt - What do this script print?

l1 = [1, 2, 3]
l2 = l1
l1 = l1 + [4]
print(l2)

• 16-answer.txt - What do this script print?

def increment(n):
    n += 1

a = 1
increment(a)
print(a)

• 17-answer.txt - What do this script print?

def increment(n):
    n.append(4)

l = [1, 2, 3]
increment(l)
print(l)

• 18-answer.txt - What do this script print?

def assign_value(n, v):
    n = v
l1 = [1, 2, 3]
l2 = [4, 5, 6]
assign_value(l1, l2)
print(l1)

• 19-copy_list.py - Write a function def copy_list(l): that returns a copy of a list.

• 20-answer.txt - Is a a tuple? Answer with Yes or No.

a = ()

• 21-answer.txt - Is a a tuple? Answer with Yes or No.

a = (1, 2)

• 22-answer.txt - Is a a tuple? Answer with Yes or No.

a = (1)

• 23-answer.txt - Is a a tuple? Answer with Yes or No.

a = (1, )

• 24-answer.txt - What does this script print?

a = (1)
b = (1)
a is b

• 25-answer.txt - What does this script print?

a = (1, 2)
b = (1, 2)
a is b

• 26-answer.txt - What does this script print?

a = ()
b = ()
a is b

• 27-answer.txt - Will the last line of this script print 139926795932424? Answer with Yes or No.

>>> id(a)
139926795932424
>>> a
[1, 2, 3, 4]
>>> a = a + [5]
>>> id(a)

• 28-answer.txt - Will the last line of this script print 139926795932424? Answer with Yes or No.

>>> a
[1, 2, 3]
>>> id (a)
139926795932424
>>> a += [4]
>>> id(a)

• 100-magic_string.py - Write a function magic_string() that returns a string “BestSchool” n times the number of the iteration.

• 101-locked_class.py - Write a class LockedClass with no class or object attribute, that prevents the user from dynamically creating new instance attributes, except if the new instance attribute is called first_name.

• 103-line1.txt - How many int objects are created by the execution of the first line of the script?

a = 1
b = 1

• 103-line2.txt - How many int objects are created by the execution of the second line of the script.

a = 1
b = 1

• 104-line1.txt - How many int objects are created by the execution of the first line of the script?

a = 1024
b = 1024
del a
del b
c = 1024

• 104-line2.txt - How many int objects are created by the execution of the second line of the script?

a = 1024
b = 1024
del a
del b
c = 1024

• 104-line3.txt - After the execution of line 3, is the int object pointed by a deleted? Answer with Yes or No.

a = 1024
b = 1024
del a
del b
c = 1024

• 104-line4.txt - After the execution of line 4, is the int object pointed by b deleted? Answer with Yes or No.

a = 1024
b = 1024
del a
del b
c = 1024

• 104-line5.txt - How many int objects are created by the execution of the last line of the script?

a = 1024
b = 1024
del a
del b
c = 1024

• 105-line1.txt - Assuming we are using a CPython implementation of Python3 with default options/configuration: Before the execution of line 2 (print("Love")), how many int objects have been created and are still in memory?

print("I")
print("Love")
print("Python")

• 106-line1.txt - How many string objects are created by the execution of the first line of the script?

a = "SCHL"
b = "SCHL"
del a
del b
c = "SCHL"

• 106-line2.txt - How many string objects are created by the execution of the second line of the script?

a = "SCHL"
b = "SCHL"
del a
del b
c = "SCHL"

• 106-line3.txt- After the execution of line 3, is the string object pointed by a deleted? Answer with Yes or No.

a = "SCHL"
b = "SCHL"
del a
del b
c = "SCHL"

• 106-line4.txt- After the execution of line 4, is the string object pointed by b deleted? Answer with Yes or No.

a = "SCHL"
b = "SCHL"
del a
del b
c = "SCHL"

• 106-line5.txt - How many string objects are created by the execution of the last line of the script.

a = "SCHL"
b = "SCHL"
del a
del b
c = "SCHL"