In [10]:

    

import numpy as np


    

In [11]:

    

f = open ('supermarket.txt')
lines = f.readlines()


    

In [12]:

    

breakpoint = 20
t = set()
def AddElements(line):
    elements = line.split(" ")
    for element in elements:
        t.add(element.strip())
def AllElementsinSet(line):
    elements = line.split(" ")
    for element in elements:
        if not element.strip() in t:
            return False
    return True


    

    




  File "<ipython-input-12-ce313902bb8f>", line 7
    def AllElementsinSet
                        ^
SyntaxError: invalid syntax

In [5]:

    

np.random.shuffle(lines)
outputfile=[]
def WriteToFile():
    output = open('supermarket.dat','w')
    for l in outputfile:
        output.write(l)


    

In [7]:

    

for line in lines:
    #outputfile.append(line)
    AddElements(line)
    if len(t)>breakpoint:
        break


    

In [ ]:

    

for line in lines:
    
    outputfile.append(line)


    

In [40]:

    

WriteToFile()


    

In [9]:

    




    

    
Out[9]:





32