text: import numpy as np
  
  a = np.array([3,1,9,1,5,3,7,8,9,5])     # One Dimentional array
  b = np.array([[1,7,3,4],[9,3,6,1],[9,2,8,1]])   # Two Dimentional array
  print("a :" ,a)
  print("b :", b)
  
  print("\nAccessing a certain item.")
  print("1D : ")
  print(a[2])     # Starts with 0
  print(a[-1])    # Prints last element
  print("2D : ")
  print(b[1][2])
  
  print("\nFinding the dimension :")
  print(a.ndim,"Dimensional array")
  print(b.ndim,"Dimensional array")
  
  print("\nShape (Rows, Column)")
  print(b.shape)
  
  print("\nSize(Number of elements)")
  print(b.size)
  
  print("\nDatatype :")
  print(a.dtype)
  
  print("\nUpdating an array :")
  print("1D : ")
  print(a)
  a[1] = 6
  print(a)
  print("2D :")
  print(b)
  b[1][2] = 8
  print(b)
  
  print("\nPrinting only fixed values(Read comments) : ")
  print("1D : ")
  print("a :" ,a)
  print(a[:3])
  print(a[3:])
  print(a[3:8])
  print(a[::2])   # Skips a value (prints all the second terms)
  print(a[::3])   # Prints only the third value
  print(a[2::3])  # Starts from the second step and prints only the third term from then
  print(a[8::-2]) # Prints from the reverse direction
  
  print("2D : ")
  print("b :\n", b)
  print(b[:2,:1])
  print(b[:2,:2])
  print(b[0,:])   # Prints only the first row
  print(b[:,0])   # Prints only the first column
  
  print("\nData Conversions : ")
  c = np.array([[1,7,6,4],[2,8.4,7,11],[2,6,4.3,12]],dtype = int)
  print("Int : \n",c)
  c = np.array([[1,7,6,4],[2,8.4,7,11],[2,6,4.3,12]],dtype = float)
  print("Float : \n",c)
  
  print("\nConverting a 1D array into a 2D array : ")
  c = np.arange(1,10).reshape(3,3)    # 3 rows and 3 columns
  print(c)
  
  print("\nConcatenating Arrays : ")
  a = np.arange(0,10,2)
  b = np.arange(0,10,3)
  c = np.concatenate([a,b])
  print(c)
  c = c.reshape(3,3)
  print("After converting to a 2d array : \n",c)
  
  print("\nComparing elements of two arrays : ")
  a = np.array([6,7,3,9])
  b = np.array([5,7,9,9])
  print(a==b)
  print(a>b)
  
  print("\nComparing complete arrays : ")
  a = np.array([5,6,7,8])
  b = np.array([1,2,3,4])
  c = np.array([1,2,3,4])
  print(np.array_equal(a,b))
  print(np.array_equal(b,c))
  
  print("\nTo add elements at the end of the array : ")
  print("a :", a)
  print(np.append(a,[100,200,300]))
  
  print("\nGengerating random numbers : ")
  big_data = np.random.random_integers(1,100,size=1000)   # Generating 1000 random numbers from 1-100 
  print(big_data)
  
  input("Press Enter key to exit ")