banking code need help

[bam]

when i try to run this code i receive a syntax error, please can u help plzz

Python 2.3 (#46, Jul 29 2003, 18:54:32) [MSC v.1200 32 bit (Intel)] on win32
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IDLE 1.0
>>> balance = 0
>>> def deposit(amount):
global balance
balance += amount
return balance

>>> def withdraw(amount)
SyntaxError: invalid syntax
>>> def withdraw(amount):
global balance
balance -= amount
return ()

>>> def make_account():
return {'balance' : 0}

>>> def deposit(account, amount):
account['balance'] += amount
return account['balance']

>>> def withdraw(account, amount):
account['balance'] -= amount
return account['balance']

>>> def _init_(self):
self.balance = 0

>>> def withdraw(self, amount):
self.balance -= amount
return self.balance

>>> def deposit(self, amount):
self.balance += amount
return self.balance

>>> a = BankAccount()

Traceback (most recent call last):
File "<pyshell#35>", line 1, in -toplevel-
a = BankAccount()
NameError: name 'BankAccount' is not defined
>>> class Canvas:
def _init_(self, width, height):
self.width = width
self.height = height
self.data = [[' '] * width for i in range(height)]

>>> def setpixel(self, row, col):
self.data[row][col] = '*'

>>> def getpixel(self, row, col):
return self.data[row][col]

>>> def display(self):
print "\n".join(["".join(row) for row in self.data])

>>> class shape:
def paint(self, convas): pass

>>> class Rectangle(Shape):
def _init_(self, x, y, w, h):
self.x = x
self.y = y
self.w = w
self.h = h

Traceback (most recent call last):
File "<pyshell#60>", line 1, in -toplevel-
class Rectangle(Shape):
NameError: name 'Shape' is not defined
>>>

>>> class Rectangle(shape):
def _init_(self, x, y, w, h):
self.x = x
self.y = y
self.w = w
self.h = h

SyntaxError: invalid syntax
>>> class Rectangle(shape):
def _init_(self, x, y, w, h):
self.x = x
self.y = y
self.w = w
self.h = h

>>> def hline(self, x, y, w):
pass

>>> def vline(self, x, y, h):
pass

>>> def paint(self, canvas):
hline(self.x, self.y self.w)

SyntaxError: invalid syntax
>>> def paint(self, canvas):
hline(self.x, self.y, self.w)
hline(self.x, self.y + self.h, self.w)
vline(self.x + self.w, self.y, self.h)

>>> class Square(rectangle):
def _init_(self, x, y, size):
Rectangle._init_(self, x, y, size, size)

Traceback (most recent call last):
File "<pyshell#85>", line 1, in -toplevel-
class Square(rectangle):
NameError: name 'rectangle' is not defined
>>> class Square(rectangle):
def _init_(sefl, x, y, size):
rectangle._init_(self, x, y, size, size)

Traceback (most recent call last):
File "<pyshell#89>", line 1, in -toplevel-
class Square(rectangle):
NameError: name 'rectangle' is not defined
>>> class CompoundShape(Shape):
def _init_(self, shapes):
self.shapes = shapes

Traceback (most recent call last):
File "<pyshell#93>", line 1, in -toplevel-
class CompoundShape(Shape):
NameError: name 'Shape' is not defined
>>> class CompountShape(shape):
def _init_(self, shapes):
self.shapes = shapes

>>> def paint(self, canvas):
for s in self.shapes:
s.paint(canvas)