NumPy String: numpy.char.translate() function

numpy.char.translate() function

For each element in a given array, the numpy.char.translate() function returns a copy of the string where all characters occurring in the optional argument deletechars are removed, and the remaining characters have been mapped through the given translation table.

The function is useful for data cleaning and manipulation tasks where certain characters or patterns need to be replaced or removed from the strings in an array.

Syntax:

numpy.char.translate(a, table, deletechars=None)

Parameters:

Return value:

out [ndarray] Output array of str or unicode, depending on input type.

Example: Using numpy.char.translate() function to delete characters from a string

>>> import numpy as np
>>> table = '*'
>>> x = np.char.translate('The quick brown fox', table, deletechars=None)
>>> x
array('The quick brown fox', dtype='<U19')

In the above example the input string is 'The quick brown fox' and the table used for translation is '*'. Since deletechars argument is set to None, this table is used to delete characters from the input string. The resulting string is stored in the variable x which is an array of dtype '<U19'.

Example-2: numpy.char.translate() function

>>> import numpy as np
>>> table = '256'
>>> x = np.char.translate('The quick brown fox jumps over the lazy dog', table, deletechars=None)
>>> x
array('The quick brown fox jumps over the lazy dog', dtype='<U43')

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