[DONE] Why it returns a non-string ?

Question

--- CORRECTED ---
class Queue:
def __init__(self, contents):
self._hiddenlist = list(contents)

def __repr__(self):
return str(self._hiddenlist)

--- WRONG ---

# TypeError. Why __str__ return non-string

# Error
class Queue:
def __init__(self, contents):
# self._hiddenlist = list(contents)
self._hiddenlist = contents
def __repr__(self):
return print(self._hiddenlist)

queue = Queue([1, 2, 3])
print(queue)

Answer 1

replace
return print(...
with
return str(...
__repr__ should return string to be printed.
print() returns something on "screen", or None object.

Answer 2

@yuri great thx!!!! Pls advice, where i must find replies on similar questions?