Appending values at the end of an NumPy array

How to Copy NumPy array into another array?

Last Updated :15 Jul, 2025

Many times there is a need to copy one array to another. Numpy provides the facility to copy array using different methods. In this

Copy NumPy Array into Another Array

There are various ways to copies created in NumPyarrays inPython, here we are discussing some generally used methods for copies created inNumPy arrays those are following.

Using np.copy() Function
Copy Given 2-D Array to Another Array
UsingAssignment Operator

Copy 1D Numpy Arrays into Another Using`np.copy() Function`

In the below example, the given Numpy array 'org_array' is copied to another array 'copy_array' using np.copy () function.

Python3

# importing Numpy packageimportnumpyasnp# Creating a numpy array using np.array()org_array=np.array([1.54,2.99,3.42,4.87,6.94,8.21,7.65,10.50,77.5])print("Original array: ")# printing the Numpy arrayprint(org_array)# Now copying the org_array to copy_array# using np.copy() functioncopy_array=np.copy(org_array)print("\nCopied array: ")# printing the copied Numpy arrayprint(copy_array)

Output:

Original array:
[ 1.54  2.99  3.42  4.87  6.94  8.21  7.65 10.5  77.5 ]
Copied array:
[ 1.54  2.99  3.42  4.87  6.94  8.21  7.65 10.5  77.5 ]

Copy Given 2-D Array to Another Array Usingnp.copy() Function

In this example, the given 2-D Numpy array 'org_array' is copied to another array 'copy_array' using np.copy () function.

Python3

# importing Numpy packageimportnumpyasnp# Creating a 2-D numpy array using np.array()org_array=np.array([[23,46,85],[43,56,99],[11,34,55]])print("Original array: ")# printing the Numpy arrayprint(org_array)# Now copying the org_array to copy_array# using np.copy() functioncopy_array=np.copy(org_array)print("\nCopied array: ")# printing the copied Numpy arrayprint(copy_array)

Output:

Original array:
[[23 46 85]
 [43 56 99]
 [11 34 55]]
Copied array:
[[23 46 85]
 [43 56 99]
 [11 34 55]]

NumPy Array Copy UsingAssignment Operator

In the below example, the given Numpy array 'org_array' is copied to another array 'copy_array' using Assignment Operator.

Python3

# importing Numpy packageimportnumpyasnp# Create a 2-D Numpy array using np.array()org_array=np.array([[99,22,33],[44,77,66]])# Copying org_array to copy_array# using Assignment operatorcopy_array=org_array# modifying org_arrayorg_array[1,2]=13# checking if copy_array has remained the same# printing original arrayprint('Original Array:\n',org_array)# printing copied arrayprint('\nCopied Array:\n',copy_array)

Output:

Original Array:
 [[99 22 33]
 [44 77 13]]
Copied Array:
 [[99 22 33]
 [44 77 13]]

Appending values at the end of an NumPy array

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