swapcase() function - NumPy

The numpy.char.swapcase() function is used to convert uppercase characters to lowercase and lowercase characters to uppercase in each string element of a NumPy array. It works element-wise and returns a new array with the modified strings.

For Example: This example demonstrates how np.char.swapcase() swaps the case of each character in a single string array.

['hELLO wORLD']

Syntax

numpy.char.swapcase(arr)

• Parameters:arr array_like -> Input array of strings.
• Return Value:ndarray -> New array with uppercase converted to lowercase and vice versa.

Examples

Example 1: In this example, we apply swapcase() on a string array containing alphanumeric values.

Array: ['P4Q R' '4q Rp' 'Q Rp4' 'rp4q']
Result: ['p4q r' '4Q rP' 'q rP4' 'RP4Q']

Example 2: In this example, we use swapcase() on an array of words.

Array: ['Geeks' 'For' 'Geeks']
Result: ['gEEKS' 'fOR' 'gEEKS']

Example 3: Here, swapcase() is applied to sentences with mixed cases.