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a = [1,2,3,4,5,6,7,8,9]

def unflatten_list(lista, grouping):
  '''
  Function : unflatten_list
  Description : Converts a list into a list of lists
  Inputs : List (Simple)
           grouping (How many values grouped together)
  Output : List of Lists (Based on grouping)
  Usage(print): print (unflatten_list(a,3))
  Usage(Assign): b = unflatten_list(a,3))
  '''
    i=0
    new_list=[]
    while i<len(lista):
        new_list.append(lista[i:i+grouping])
        i+=grouping
    return new_list        
        

print (unflatten_list(a, 2))

def tuple2list(tuple):
  '''
  Function : tuple2list
  Description : Converts a tuple into a list
  Inputs : Tuple
  Output : List
  Usage(print): print (tuple2list(tuple))
  Usage(Assign): b = tuple2list(tuple))
  '''
  outlist = []
  for j in tuple:
    outlist.append(j)
  return outlist
  
  
  

n = [[1, 2, 3], [4, 5, 6, 7, 8, 9]]
# Add your function here

def flatten_list(lists):
  '''
  Function : flatten_list
  Description : Converts a list of lists into a list
  Inputs : List of Lists
  Output : List
  Usage(print): print (flatten_list(Lists))
  Usage(Assign): b = flatten_list(Lists))
  '''
    results = []
    for numbers in lists:
        for j in numbers:
            results.append(j)
    return results


print flatten(n)



def flatten(S):
    if S == []:
        return S
    if isinstance(S[0], list):
        return flatten(S[0]) + flatten(S[1:])
    return S[:1] + flatten(S[1:])
s=[[1,2],[3,4]]
print("Flattened list is: ",flatten(s))

def list2tuple(lista):
  '''
  Function : list2tuple
  Description : Converts a list into a tuple
  Inputs : List
  Output : Tuple
  Usage(print): print (list2tuple(list))
  Usage(Assign): b = list2tuple(list))
  '''
    outtup = ()
    for j in lista:
        outtup = outtup + (j,)
        
    return outtup
    
a = [1,2,3,4,5]

print (list2tuple(a))