

In [1]:

    
print("hello world")









    



hello world



In [2]:

    
x=7



In [3]:

    
x.bit_length()









    Out[3]:





3



In [4]:

    
x=3.14159



In [5]:

    
type(x)









    Out[5]:





float



In [6]:

    
x=0.25



In [7]:

    
x.as_integer_ratio()









    Out[7]:





(1, 4)



In [8]:

    
x="hello"



In [9]:

    
type(x)









    Out[9]:





str



In [10]:

    
x.capitalize()









    Out[10]:





'Hello'



In [11]:

    
x='world'



In [12]:

    
print(x)









    



world



In [13]:

    
x="""
Hello
World

"""
print(x)









    



Hello
World

Tuple



In [14]:

    
x=(2,3,"text")



In [15]:

    
print(x)









    



(2, 3, 'text')



In [16]:

    
x[2]









    Out[16]:





'text'



In [17]:

    
x[-1]









    Out[17]:





'text'



In [18]:

    
x[-2]









    Out[18]:





3

List



In [19]:

    
x=[1,3,5,"hello"]



In [20]:

    
print(x)









    



[1, 3, 5, 'hello']



In [21]:

    
x.append("world")



In [22]:

    
x









    Out[22]:





[1, 3, 5, 'hello', 'world']



In [23]:

    
x.pop()









    Out[23]:





'world'



In [24]:

    
x









    Out[24]:





[1, 3, 5, 'hello']



In [25]:

    
x={"key":"value", "cat":"a small animal" }



In [26]:

    
x









    Out[26]:





{'cat': 'a small animal', 'key': 'value'}



In [27]:

    
x['cat']









    Out[27]:





'a small animal'



In [28]:

    
x['dog']="a bigger animal"



In [29]:

    
x









    Out[29]:





{'cat': 'a small animal', 'dog': 'a bigger animal', 'key': 'value'}



In [30]:

    
x.get('duck','not found')









    Out[30]:





'not found'



In [31]:

    
for i in [1,2,3]:
    print(i)



In [32]:

    
for i in range(0,10,2):
    print(i)



In [33]:

    
i=0
while i<5:
    i+=1
    print i



In [34]:

    
def f(x):
    y=2*x
    return y



In [35]:

    
f(3)









    Out[35]:





6



In [36]:

    
g=f



In [37]:

    
g(5)









    Out[37]:





10



In [38]:

    
x=[]
for i in range(1,13):
    x.append(i*25)



In [39]:

    
x









    Out[39]:





[25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300]



In [40]:

    
%%timeit -n1
x=[]
for i in range(1,13000000):
    x.append(i*25)









    



1 loop, best of 3: 6.3 s per loop



In [41]:

    
x=[i*25 for i in range(1,13)]



In [42]:

    
x









    Out[42]:





[25, 50, 75, 100, 125, 150, 175, 200, 225, 250, 275, 300]



In [43]:

    
%%timeit -n1
x=[i*25 for i in xrange(1,13000000)]









    



1 loop, best of 3: 3.19 s per loop



In [44]:

    
x={i:i*25 for i in range(1,13)}



In [45]:

    
x









    Out[45]:





{1: 25,
 2: 50,
 3: 75,
 4: 100,
 5: 125,
 6: 150,
 7: 175,
 8: 200,
 9: 225,
 10: 250,
 11: 275,
 12: 300}

Find Fibonacci numbers f(x) when using the input from the given file.

\begin{eqnarray*} f(1)&=&1\\ f(2)&=&1\\ f(x)&=&f(x-1)+f(x-2)\\ \end{eqnarray*}



In [46]:

    
with open("fibo_input.txt","r") as fp:
    s=fp.read()
    x=[int(i) for i in s.split()]



In [47]:

    
x









    Out[47]:





[2, 3, 10, 27, 48, 56, 75, 89, 92]



In [ ]: