Filling the array with random values

:

   import  radomitems = [radom.randint ( 0 , )  for  i  in   range  ( 100,000 )]   print  ( len  (items)) # 100000      
  
 if only unique numbers in the indicated range, then you can simply generate All numbers from the range and mix them: 
  
   import  radomitems =  list  ( range  ( 100000 ))   print  (items [:  5 ])) # [0, 2, 2, 3, 4]  random.shuffle (items)   print  (items [:  5 ])    import  numpyitems = numpy.random.randint ( 100000 , Size = )   print  ( len  (items), items [:  5 ]) # 100000 [73846 49707 18846 73887 43349]      
 this function generates the indicated number of numbers, in the specified random range, but there is no guarantee of uniqueness numbers. 
  
  
  maxu  proposed the generation of unique random numbers using  numpy.random.choice : 
  
   import  numpyitems = numpy.random.choice ( 100000 ,  100000 , replace =  false )   print  ( len  (items), items [:  5 ]) # 100000 [94792 79537 9678 66784 92049]