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# NumPy | tolist method

schedule Aug 11, 2023
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Numpy's tolist(~) method converts a Numpy array to a standard Python list.

NOTE

Difference between list(arr) and arr.tolist(~)

Both methods convert a Numpy array to a standard Python list. However, the list(arr) method does not perform the conversion recursively, that is, if your Numpy array is 2D for instance, then only the outer array would become converted into a list with the inner Numpy array left as is. In contrast, the arr.tolist() will convert both the outer and inner arrays to a Numpy array.

See examples below for clarification.

# Parameters

This method does not take any parameter.

# Return value

A standard Python list.

# Examples

a = np.array([5,6,7])
a.tolist()
[5, 6, 7]
a = np.array([[5,6],[7,8]])
a.tolist()
[[5, 6], [7, 8]]

This is contrast to list(~) method:

a = np.array([[5,6],[7,8]])
list(a)
[array([5, 6]), array([7, 8])]
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