Class Python Demos

I will be using this Notebook for class demos. To use at home, load Anaconda (https://www.continuum.io/downloads) or WinPython (https://winpython.github.io/)

First let's create a random list using the numpy library.



In [1]:

    
import numpy as np
nums1 = np.random.randint(1,11, 15)
nums1









    Out[1]:





array([10,  4,  4,  2, 10, 10,  8,  5,  3,  4,  7,  7,  9,  7,  8])

Let's look at what set() does!



In [2]:

    
set1 = set(nums1)
set1









    Out[2]:





{2, 3, 4, 5, 7, 8, 9, 10}

Let's create a 2nd list and set.



In [3]:

    
nums2 = np.random.randint(1,11, 12)
nums2









    Out[3]:





array([ 4,  2,  6,  4, 10,  2,  5,  2,  1,  7,  4,  4])



In [4]:

    
set2 = set(nums2)
set2









    Out[4]:





{1, 2, 4, 5, 6, 7, 10}

...and look at the differences!



In [5]:

    
set2.difference(set1)









    Out[5]:





{1, 6}



In [6]:

    
set1.difference(set2)









    Out[6]:





{3, 8, 9}



In [7]:

    
# Intersection
set1 & set2









    Out[7]:





{2, 4, 5, 7, 10}



In [8]:

    
# Union
set1 | set2









    Out[8]:





{1, 2, 3, 4, 5, 6, 7, 8, 9, 10}



In [9]:

    
# Difference
(set1 - set2) | (set2 - set1)









    Out[9]:





{1, 3, 6, 8, 9}



In [10]:

    
# Difference method 2
(set1 | set2) - (set1 & set2)









    Out[10]:





{1, 3, 6, 8, 9}



In [ ]: