I need help with Python for these 3 tasks, please. :)

def pythonlist_to_Stack(stack, source):

"""

-------------------------------------------------------

Pushes contents of source onto stack. At finish, source is empty.

Last value in source is at bottom of stack,

first value in source is on top of stack.

Use: pythonlist_to_stack(stack, source)

-------------------------------------------------------

Parameters:

stack - a Stack object (Stack)

source - a Python list (list)

Returns:

None

-------------------------------------------------------

"""

# your code here

def stack_to_pythonlist(stack, target):

"""

-------------------------------------------------------

Pops contents of stack into target. At finish, stack is empty.

Top value of stack is at end of target,

bottom value of stack is at beginning of target.

Use: stack_to_pythonlist(stack, target)

-------------------------------------------------------

Parameters:

stack - a Stack object (Stack)

target - a Python list (list)

Returns:

None

-------------------------------------------------------

"""

# your code here

def test_Stack(source):

"""

-------------------------------------------------------

Tests the methods of Stack for empty and

non-empty stacks using the data in source:

is_empty, push, pop, peek

(Testing pop and peek while empty throws exceptions)

Use: stack_test(source)

-------------------------------------------------------

Parameters:

source - list of data (list of ?)

Returns:

None

-------------------------------------------------------

"""

# your code here

Here is what goes through the testing file:

Test 'pythonlist_to_Stack' with python list: '[]'

Test 'pythonlist_to_Stack' with python list: '[99]'

Test 'pythonlist_to_Stack' with python list: '[11, 22, 33, 44, 55]'

Test 'pythonlist_to_Stack' with python list: '[55, 44, 33, 22, 11]'

Test 'Stack_to_pythonlist' with python Stack: '[]'

Test 'Stack_to_pythonlist' with python Stack: '[99]'

Test 'Stack_to_pythonlist' with python Stack: '[11, 22, 33, 44, 55]'

Test 'Stack_to_pythonlist' with python Stack: '[55, 44, 33, 22, 11]'

Thank you so much!

Stacks:

In the Stacks_array module:

DEFAULT_SIZE = 10

def __init__(self, max_size = DEFAULT_SIZE): """ ------------------------------------------------------- Initializes an empty stack. Data is stored in a fixed-size Python list. Use: stack = Stack(max_size) Use: stack = Stack() # uses default max size ------------------------------------------------------- Parameters: max_size - maximum size of the Stack (int > 0) Returns: a new Stack object (Stack) ------------------------------------------------------- """ assert max_size > 0, "Queue size must be > 0" self._capacity = max_size self._values = [None] * self._capacity self._top = -1

def isEmpty(self): """ ------------------------------------------------------- Determines if the stack is empty. Use: b = stack.is_empty() ------------------------------------------------------- Returns: True if stack is empty, False otherwise ------------------------------------------------------- """ # your code goes here if self._top == -1: empty = True else: empty = False return empty

def isFull(self): """ ------------------------------------------------------- Determines if the stack is full. Use: b = stack.isFull() ------------------------------------------------------- Returns: True if stack is full, False otherwise ------------------------------------------------------- """ # your code goes here if self._top == self._capacity -1: full = True else: full = False return full

def push(self, element): """ ------------------------------------------------------- Pushes a copy of the given element onto the top of the stack. Use: stack.push(element) ------------------------------------------------------- Parameters: element - the data element to be added to stack (?) Returns: None ------------------------------------------------------- """ assert not self.isFull(), "Stack is full" self._top += 1 self._values[ self._top ] = deepcopy( element ) return

def pop(self): """ ------------------------------------------------------- Pops and returns the top of stack. The data element is removed from the stack. Attempting to pop from an empty stack throws an exception. Use: value = stack.pop() ------------------------------------------------------- Returns: value - the value at the top of stack (?) ------------------------------------------------------- """ assert not self.isEmpty(), "Cannot pop from an empty stack"

value = deepcopy( self._values[ self._top ] ) self._top -=1 return value

def peek(self): """ ------------------------------------------------------- Returns a copy of the value at the top of the stack without removing it. Attempting to peek at an empty stack throws an exception. Use: value = stack.peek() ------------------------------------------------------- Returns: value - a copy of the value at the top of stack (?) ------------------------------------------------------- """ #your code goes here assert len(self._values) > 0, "Cannot peak at an empty stack" value = deepcopy(self.values[-1]) return value