In [1]:

    

x = 15
print(10 < x < 20)


    

    




True

In [2]:

    

print(10 < x and x < 20)


    

    




True

In [3]:

    

x = 0
print(10 < x < 20)


    

    




False

In [4]:

    

print(10 < x and x < 20)


    

    




False

In [5]:

    

x = 15
y = 25

print(10 < x < 20 < y < 30)


    

    




True

In [6]:

    

print(10 < x and x < 20 and 20 < y and y < 30)


    

    




True

In [7]:

    

x = 15
y = 40

print(10 < x < 20 < y < 30)


    

    




False

In [8]:

    

print(10 < x and x < 20 and 20 < y and y < 30)


    

    




False

In [9]:

    

def test(x):
    print('function is called')
    return(x)


    

In [10]:

    

print(test(15))


    

    




function is called
15

In [11]:

    

print(10 < test(15) < 20)


    

    




function is called
True

In [12]:

    

print(10 < test(15) and test(15) < 20)


    

    




function is called
function is called
True

In [13]:

    

print(10 < test(0) < 20)


    

    




function is called
False

In [14]:

    

print(10 < test(0) and test(0) < 20)


    

    




function is called
False

In [15]:

    

x = 15

if 10 < x < 20:
    print('result: 10 < x < 20')
else:
    print('result: x <= 10 or 20 <= x')


    

    




result: 10 < x < 20

In [16]:

    

x = 30

if 10 < x < 20:
    print('result: 10 < x < 20')
else:
    print('result: x <= 10 or 20 <= x')


    

    




result: x <= 10 or 20 <= x

In [17]:

    

a = 10
b = 10
c = 10

if a == b == c:
    print('all equal')
else:
    print('not all equal')


    

    




all equal

In [18]:

    

a = 10
b = 1
c = 10

if a == b == c:
    print('all equal')
else:
    print('not all equal')


    

    




not all equal

In [19]:

    

a = 10
b = 1
c = 100

print(a != b != c)


    

    




True

In [20]:

    

a = 10
b = 10
c = 1

print(a != b != c)


    

    




False

In [21]:

    

a = 10
b = 1
c = 10

print(a != b != c)


    

    




True

In [22]:

    

a = 100
l = [0, 10, 100, 1000]


    

In [23]:

    

print(50 < a in l)


    

    




True

In [24]:

    

print(50 < a and a in l)


    

    




True