Python 3.2.5 (default, May 15 2013, 23:07:10) [MSC v.1500 64 bit (AMD64)] on win32
Type "copyright", "credits" or "license()" for more information.

#converting a number in a decimal representation to a binary rep. (b=2)
#the function returns a string



>>> bin(10)
'0b1010'
>>> _
'0b1010'
>>> type(_)
<class 'str'>
>>> type(bin(10))
<class 'str'>
>>> bin(12)
'0b1100'


#converting a number in a decimal representation to a hexadecimal rep. (b=16)
#the function returns a string


>>> hex(161)
'0xa1'

#converting a string representing a number in a given base (default b= 10) to an integer in a decimal rep. (b=10)


>>> int("1100", 2)
12
>>> int("a1", 16)
161
>>> int("1100", 10)
1100


#Running the initial version of convert_base


>>> ================================ RESTART ================================
>>> 
>>> convert_base(10, 2)
'1010'
>>> convert_base(0, 2)
''


#Running the updated version of convert_base


>>> ================================ RESTART ================================
>>> 
>>> convert_base(0, 2)
'0'
>>> convert_base(10, 16)
'10'
>>> convert_base(17, 16)
'11'
>>> hex(17)
'0x11'
>>> convert_base(161, 16)
'101'
>>> ================================ RESTART ================================
>>> 
>>> convert_base(161, 16)
'a1'


#memory model

#examples:



>>> 
>>> 
>>> 
>>> 
>>> 
>>> def change_int(n):
	n = 999

	
>>> x = 10
>>> change_int(x)
>>> x
10
>>> def add_to_list(lst):
	lst.append(999)

	
>>> lst = [1,2,3]
>>> add_to_list(lst)
>>> lst
[1, 2, 3, 999]
>>> 
>>> 
>>> def change_list(l):
	l = [999, 999]

	
>>> lst
[1, 2, 3, 999]
>>> change_list(lst)
>>> lst
[1, 2, 3, 999]
>>> 

	
>>> lst = [3,2,1]
>>> 
>>> lst
[3, 2, 1]
>>> id(lst)
41124872
>>> lst_new = lst
>>> id(lst_new)
41124872
>>> lst.append(900)
>>> id(lst)
41124872
>>> lst = lst + [10,20]
>>> id(lst)
62397640
>>> id(lst_new)
41124872
>>>