[Tutor] why do i get None as output

[Roelof Wobben]

Hello, 

 

I have this programm:

 

def encapsulate(val, seq):
    if type(seq) == type(""):
        return str(val)
    if type(seq) == type([]):
        return [val]
    return (val,)

 

def insert_in_middle(val, seq):
    middle = len(seq)/2
    return seq[:middle] + encapsulate(val, seq) + seq[middle:]

 

def make_empty(seq):
    """
      >>> make_empty([1, 2, 3, 4])
      []
      >>> make_empty(('a', 'b', 'c'))
      ()
      >>> make_empty("No, not me!")
      ''
    """
    word2=""
    teller=0
    if type(seq) == type([]):
        teller=0 
        while teller < len(seq):
            seq[teller]=""
            teller = teller + 1 
    elif type(seq) == type(()):
        tup2 = list (seq)
        while teller > tup2.len():
            tup2[teller]=""
            teller = teller + 1
        seq = tuple(tup2)
    else:
        seq = ""
       
test = make_empty([1, 2, 3, 4])
print test

 

But now I get None as output instead of []

 

Can anyone explain why that happens ?

 

Roelof

    
 		 	   		  
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