In [1]:

    

a = (i*i for i in range(3))


    

In [2]:

    

a


    

    
Out[2]:





<generator object <genexpr> at 0xb4b53d24>

In [3]:

    

tuple(a)


    

    
Out[3]:





(0, 1, 4)

In [4]:

    

tuple(a)


    

    
Out[4]:





()

In [5]:

    

a = (i*i for i in range(3))


    

In [6]:

    

a


    

    
Out[6]:





<generator object <genexpr> at 0xb4b6e20c>

In [7]:

    

list(a)


    

    
Out[7]:





[0, 1, 4]

In [8]:

    

a = (i*i for i in range(3))


    

In [9]:

    

a


    

    
Out[9]:





<generator object <genexpr> at 0xb4b6e414>

In [10]:

    

set(a)


    

    
Out[10]:





{0, 1, 4}

In [11]:

    

def foo():
    yield 3


    

In [12]:

    

[i for i in foo()]


    

    
Out[12]:





[3]

In [13]:

    

def foo():
    yield 3
    yield from (i*i for i in range(3))
    yield 'hello'
    yield from 'hello'
    yield [5, 'there']


    

In [14]:

    

[i for i in foo()]


    

    
Out[14]:





[3, 0, 1, 4, 'hello', 'h', 'e', 'l', 'l', 'o', [5, 'there']]

In [15]:

    

def foo():
    yield 'five'
    yield from (3, 4,5, 'hello')
    yield 'more'


    

In [16]:

    

[i for i in foo()]


    

    
Out[16]:





['five', 3, 4, 5, 'hello', 'more']