NumPy - String Functions

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The following functions are used to perform vectorized string operations for arrays of dtype numpy.string_ or numpy.unicode_. They are based on the standard string functions in Python's built-in library.

Sr.No.	Function & Description
1	add() Returns element-wise string concatenation for two arrays of str or Unicode
2	multiply() Returns the string with multiple concatenation, element-wise
3	center() Returns a copy of the given string with elements centered in a string of specified length
4	capitalize() Returns a copy of the string with only the first character capitalized
5	title() Returns the element-wise title cased version of the string or unicode
6	lower() Returns an array with the elements converted to lowercase
7	upper() Returns an array with the elements converted to uppercase
8	split() Returns a list of the words in the string, using separatordelimiter
9	splitlines() Returns a list of the lines in the element, breaking at the line boundaries
10	strip() Returns a copy with the leading and trailing characters removed
11	join() Returns a string which is the concatenation of the strings in the sequence
12	replace() Returns a copy of the string with all occurrences of substring replaced by the new string
13	decode() Calls str.decode element-wise
14	encode() Calls str.encode element-wise

These functions are defined in character array class (numpy.char). The older Numarray package contained chararray class. The above functions in numpy.char class are useful in performing vectorized string operations.