In [5]:

    

def sq(a, x):
    while True:
        print(x)
        y = (x + a/x) / 2
        if y == x:
            break
        x = y
    return x


    

In [7]:

    

sq(4,30)


    

    




30
15.066666666666666
7.666076696165192
4.093927989455537
2.535492372645326
2.0565476126560274
2.0007774272954872
2.000000151039589
2.0000000000000058
2.0






    
Out[7]:





2.0

In [8]:

    

l = [23,43,55]


    

In [9]:

    

for idx, val in enumerate(l):
    print(idx, val)


    

    




0 23
1 43
2 55

In [20]:

    

t = ['a','b','c','d','e','f']


    

In [21]:

    

t[1:3] = ['x','y','z']


    

In [22]:

    

t


    

    
Out[22]:





['a', 'x', 'y', 'z', 'd', 'e', 'f']

In [23]:

    

t


    

    
Out[23]:





['a', 'x', 'y', 'z', 'd', 'e', 'f']

In [24]:

    

ll = [1,2]


    

In [26]:

    

ll.append(3)


    

In [27]:

    

ll


    

    
Out[27]:





[1, 2, 3]

In [28]:

    

ll = ['a','b']


    

In [29]:

    

sum(ll)


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-29-11cabd66443f> in <module>()
----> 1 sum(ll)

TypeError: unsupported operand type(s) for +: 'int' and 'str'

In [30]:

    

ll = ['a','a']


    

In [31]:

    

ll


    

    
Out[31]:





['a', 'a']

In [32]:

    

ll.remove('a')


    

In [33]:

    

ll


    

    
Out[33]:





['a']

In [34]:

    

a = '11'


    

In [35]:

    

la = list(a)


    

In [36]:

    

la


    

    
Out[36]:





['1', '1']

In [44]:

    

a = "abc"


    

In [45]:

    

"-".join(list(a))


    

    
Out[45]:





'a-b-c'

In [47]:

    

from  functools import reduce


    

In [48]:

    

reduce(lambda x,y: x+y, [1,2,3])


    

    
Out[48]:





6

In [49]:

    

def redu(x, y):
    result = 0
    if x == y:
        result += (x+y)
    else:
        result += x
    return result


    

In [51]:

    

reduce(redu, [1,1])


    

    
Out[51]:





2

In [54]:

    

",".join(list("abcde"))


    

    
Out[54]:





'a,b,c,d,e'

In [55]:

    

str(['a','b'])


    

    
Out[55]:





"['a', 'b']"

In [57]:

    

''.join(['a',1])


    

    




---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-57-6a4370fcfd7d> in <module>()
----> 1 ''.join(['a',1])

TypeError: sequence item 1: expected str instance, int found

In [61]:

    

''.join(list(map(lambda x: str(x),['a',1])))


    

    
Out[61]:





'a1'

In [62]:

    

print('\x1b[6;30;42m' + 'Success!' + '\x1b[0m')


    

    




Success!

In [66]:

    

list(range(10,0,-1))


    

    
Out[66]:





[10, 9, 8, 7, 6, 5, 4, 3, 2, 1]

In [67]:

    

a = [1,2,3]


    

In [68]:

    

a[:]


    

    
Out[68]:





[1, 2, 3]

In [69]:

    

a[:30]


    

    
Out[69]:





[1, 2, 3]

In [90]:

    

def upper_str(str):
    result = ""
    for i in str:
        result += (chr(ord(i) - 32))
    return result


    

In [91]:

    

upper_str('abc')


    

    
Out[91]:





'ABC'

In [92]:

    

-5 is -5


    

    
Out[92]:





True

In [93]:

    

-6 is -6


    

    
Out[93]:





False

In [94]:

    

'banana'.maketrans('an','oh')


    

    
Out[94]:





{97: 111, 110: 104}

In [ ]: