class Test:
    def __init__(self, thing):
        self.thing = thing
    def f1(self, thing):
        return self + " and " + thing #<<<

a = Test("apples")
a.f1("cinnamon")

class Test(object):
    def __init__(self, thing):
        self.thing = thing

    def __str__(self):
        return self.thing

 >>> a=Test('apple')
 >>> print a
 apple

class Test(object):
    def __init__(self, thing):
        self.thing = thing
    def __repr__(self):
        return self.thing

>>> Test('pear')
pear

class Test(object):
    def __init__(self, thing):
        self.thing = thing

    def andthis(self, other):
        return '{} and {}'.format(self.thing, other)

>>> apple=Test('apple')
>>> apple.andthis('cinnamon')
'apple and cinnamon'
>>> Test('apple').andthis('carrots')
'apple and carrots'

def f1(self, otherthing):
    return '{} and {}'.format(self.thing, otherthing)

def f1(self, otherthing):
    return self.thing + ' and ' + otherthing

>>> class Test:
...     def __init__(self, thing):
...         self.thing = thing
...     def f1(self, otherthing):
...         return '{} and {}'.format(self.thing, otherthing)
...
>>> a = Test("apples")
>>> a.f1("cinnamon")
'apples and cinnamon'

def __str__(self):
    return self.thing

class Test:
    def __init__(self, thing):
        self.thing = thing

    def f1(self, thing):
        return str(self) + " and " + thing

    def __str__(self):
        return self.thing

a = Test("apples")
print a
>> "apples"
print a.f1("orange")
>> "apples and orange"

class Test:
def __init__(self, thing):
    self.thing = thing
def f1(self, thing):
    return print(self.thing + " and " + thing)

a = Test("apples")
a.f1("cinnamon")