I need help--lists and Python

def retlist():
    return []

def retlist():
    a = list()
    a.append(5)
    return a

def retlist():
    return [x*x for x in range(10)]

In [1]: def pants():
   ...:     return [1, 2, 'steve']
   ...:
In [2]: pants()
Out[2]: [1, 2, 'steve']