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In [2]:

    
print("Hello World!")









    



Hello World!

Variables



In [18]:

    
x=8



In [19]:

    
type(x)









    Out[19]:





int



In [20]:

    
x.bit_length()









    Out[20]:





4



In [21]:

    
x=3.14159



In [22]:

    
type(x)









    Out[22]:





float



In [23]:

    
x=0.25



In [24]:

    
x.as_integer_ratio()









    Out[24]:





(1, 4)



In [25]:

    
x="text"



In [26]:

    
x='text'



In [30]:

    
x="""
"Hello"
"""



In [32]:

    
x









    Out[32]:





'\n"Hello"\n'

Tuple



In [33]:

    
x=(2,3,4,"text")



In [34]:

    
x[0]









    Out[34]:





2



In [35]:

    
x[1]









    Out[35]:





3



In [36]:

    
x[3]









    Out[36]:





'text'



In [37]:

    
x[-1]









    Out[37]:





'text'



In [38]:

    
x[-2]









    Out[38]:





4

List



In [39]:

    
x=[2,4,6]



In [40]:

    
x.append(8)



In [41]:

    
x









    Out[41]:





[2, 4, 6, 8]



In [42]:

    
x.pop()









    Out[42]:





8



In [43]:

    
x









    Out[43]:





[2, 4, 6]



In [44]:

    
x.pop(0)









    Out[44]:





2



In [45]:

    
x









    Out[45]:





[4, 6]

Dictionary



In [49]:

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



In [50]:

    
x









    Out[50]:





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



In [51]:

    
x['cat']









    Out[51]:





'a samll animal'



In [53]:

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



In [54]:

    
x









    Out[54]:





{'cat': 'a samll animal', 'dog': 'a larger animal', 'key': 'value'}



In [56]:

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









    Out[56]:





'not found'

for loop



In [57]:

    
for i in [2,4,6,8]:
    print(i)



In [62]:

    
for i in range(2,11,2):
    print(i)

While loop



In [66]:

    
i=0
while i<4:
    print(i)
    i+=1

function



In [69]:

    
def f(x):
    return x*x



In [70]:

    
f(3)









    Out[70]:





9



In [71]:

    
g=f



In [72]:

    
g(5)









    Out[72]:





25



In [73]:

    
def h(x=0):
    y=2*x
    return y



In [74]:

    
h(3)









    Out[74]:





6



In [75]:

    
h()









    Out[75]:





0

Quiz



In [76]:

    
with open("fibo_input.txt","r") as fp:
    s=fp.read()



In [82]:

    
n=[]
for i in s.split():
    n.append(int(i))



In [83]:

    
n









    Out[83]:





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



In [84]:

    
%%timeit -n1
with open("fibo_input.txt","r") as fp:
    s=fp.read()
n=[]
for i in s.split():
    n.append(int(i))









    



1 loop, best of 3: 188 µs per loop

Solution



In [109]:









    



1
2
55
196418
4807526976
225851433717
2111485077978050
1779979416004714189
7540113804746346429
1
2
55
196418
4807526976
225851433717
2111485077978050
1779979416004714189
7540113804746346429
1
2
55
196418
4807526976
225851433717
2111485077978050
1779979416004714189
7540113804746346429
1 loop, best of 3: 851 µs per loop