Please use the code and instructions below, otherwise it will not work properly. Code is provided below instructions:

"""

File: array.py

Project 4.5

Adds the __eq__ method.

An Array is a restricted list whose clients can use

only [], len, iter, and str.

To instantiate, use

= array(, )

The fill value is None by default.

"""

class Array(object):

"""Represents an array."""

def __init__(self, capacity, fillValue = None):

"""Capacity is the static size of the array.

fillValue is placed at each position."""

self.items = list()

self.logicalSize = 0

# Track the capacity and fill value for adjustments later

self.capacity = capacity

self.fillValue = fillValue

for count in range(capacity):

self.items.append(fillValue)

def __len__(self):

"""-> The capacity of the array."""

return len(self.items)

def __str__(self):

"""-> The string representation of the array."""

return str(self.items)

def __iter__(self):

"""Supports traversal with a for loop."""

return iter(self.items)

def __getitem__(self, index):

"""Subscript operator for access at index.

Precondition: 0

if index = self.size():

raise IndexError("Array index out of bounds")

return self.items[index]

def __setitem__(self, index, newItem):

"""Subscript operator for replacement at index.

Precondition: 0

if index = self.size():

raise IndexError("Array index out of bounds")

self.items[index] = newItem

def size(self):

"""-> The number of items in the array."""

return self.logicalSize

def grow(self):

"""Increases the physical size of the array if necessary."""

# Double the physical size if no more room for items

# and add the fillValue to the new cells in the underlying list

for count in range(len(self)):

self.items.append(self.fillValue)

def shrink(self):

"""Decreases the physical size of the array if necessary."""

# Shrink the size by half but not below the default capacity

# and remove those garbage cells from the underlying list

newSize = max(self.capacity, len(self) // 2)

for count in range(len(self) - newSize):

self.items.pop()

def insert(self, index, newItem):

"""Inserts item at index in the array."""

if self.size() == len(self):

self.grow()

if index >= self.size():

self.items[self.size()] = newItem

else:

index = max(index, 0)

# Shift items down by one position

for i in range(self.size(), index, -1):

self.items[i] = self.items[i - 1]

# Add new item and increment logical size

self.items[index] = newItem

self.logicalSize += 1

def pop(self, index):

"""Removes and returns item at index in the array.

Precondition: 0

if index = self.size():

raise IndexError("Array index out of bounds")

itemToReturn = self.items[index]

# Shift items up by one position

for i in range(index, self.size() - 1):

self.items[i] = self.items[i + 1]

# Reset empty slot to fill value

self.items[self.size() - 1] = self.fillValue

self.logicalSize -= 1

if self.size() self.capacity:

self.shrink()

return itemToReturn

def main():

"""Test code for modified Array class."""

a = Array(5)

for item in range(4):

a.insert(0, item)

b = a

c = Array(5)

for item in range(4):

c.insert(0, item)

print("True:", a == b)

print("True:", a is b)

print("True:", a == c)

print("False:", a is c)

c.insert(10, 10)

print("False:", a == c)

c.pop(c.size() - 1)

c[2] = 6

print("False:", a == c)

d = []

print("False:", a == d)

if __name__ == "__main__":

main()

Add the method _eq_ to the Array class. Python runs this method when an Array object appears as the left operand of the == operator. The method returns True if its argument is: 1. also an Array 2. has the same logical size as the left operand, 3. and the pair of items at each logical position in the two arrays are equal. Otherwise, the method returns False . A main() has been provided to test the implementation of the _eq__ method