In [48]:

    

import time
t1 = time.time()


    

In [49]:

    

t2 = time.time()
print(t2-t1)


    

    




3.779008626937866

In [10]:

    

str1 = ' a b c '
str1.replace(' ','')


    

    
Out[10]:





'abc'

In [7]:

    

import numpy as np
a = np.array([1, 2, 3, 4])
b = np.array([2, 4, 6, 8])
c=set(a).intersection(b)
c


    

    
Out[7]:





{2, 4}

In [28]:

    

for i in enumerate(b):
    print(i)


    

    




(0, 2)
(1, 4)
(2, 6)
(3, 8)

In [26]:

    

a = [1, 2, 3, 4]
b = [2, 4, 6, 8]
[i for i, value in enumerate(b) if value in a]


    

    
Out[26]:





[0, 1]

In [8]:

    

[np.where(a == e) for e in c if np.where(a ==e)]


    

    
Out[8]:





[(array([1]),), (array([3]),)]

In [9]:

    

[np.where(b == e) for e in c if np.where(b ==e)]


    

    
Out[9]:





[(array([0]),), (array([1]),)]

In [10]:

    

x=[1,2,3,4,5]
y=[1,1,2,3,4]
set(x)


    

    
Out[10]:





{1, 2, 3, 4, 5}

In [11]:

    

set(y)


    

    
Out[11]:





{1, 2, 3, 4}

In [18]:

    

c=np.intersect1d(x,y)


    

In [19]:

    

[np.where(x == e) for e in c if np.where(x ==e)]


    

    
Out[19]:





[(array([0]),), (array([1]),), (array([2]),), (array([3]),)]

In [21]:

    

a_list = []

for e in c:
    if np.where(x==e):
        a_list.append(np.where(x==e))


    

In [22]:

    

a_list


    

    
Out[22]:





[(array([0]),), (array([1]),), (array([2]),), (array([3]),)]