def base_converter(dec_number, base):
"""
A decimal to binary convertion function using
the divide_by_2 Algorithm
this function converts from any base to binary
-Implemented usign the stack data structure
"""
digits = "0123456789ABCDEF"
rem_stack = Bstack()
while dec_number > 0:
rem = dec_number % base
rem_stack.push(rem)
dec_number = dec_number // base
new_string = ""
while not rem_stack.is_empty():
new_string = new_string + digits[rem_stack.pop()]
return new_string
def divide_by_2(dec_number):
rem_stack = Bstack()
while dec_number > 0:
rem = dec_number % 2
rem_stack.push(rem)
dec_number = dec_number // 2
bin_string = ""
while not rem_stack.is_empty():
bin_string = bin_string + str(rem_stack.pop())
return bin_string
def par_checker(userstring):
"""
This function is only applicable to structuring
parenthesis ( and )
31/12/2015 after my laptop spoilt
so am using a desktop to do the coding
"""
correct = True
stack = Bstack()
error = ""
for xter in userstring :
if xter == "(":
#put into the stack
stack.push(xter)
print(stack.get_items())
elif xter == ")":
try:
stack.pop() # remove one ( from stack
except IndexError, e:
correct = False
else:
correct = False
error = "Improper character in userstring !"
