Numpy String Functions

Author: OmkarPathak

Numpy/P06_NumpyStringFunctions.py

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+# Author: OMKAR PATHAK
+
+import numpy as np
+
+abc = ['abc']
+xyz = ['xyz']
+
+# string concatenation
+print(np.char.add(abc, xyz))    # ['abcxyz']
+
+print(np.char.add(abc, 'pqr'))  # ['abcpqr']
+
+# string multiplication
+print(np.char.multiply(abc, 3)) # ['abcabcabc']
+
+# numpy.char.center: This function returns an array of the required width so that the input string is
+# centered and padded on the left and right with fillchar.
+
+print(np.char.center(abc, 20, fillchar = '*'))  # ['********abc*********']
+
+# numpy.char.capitalize(): This function returns the copy of the string with the first letter capitalized.
+print(np.char.capitalize('hello world'))        # Hello world
+
+# numpy.char.title(): This function returns a title cased version of the input string with the first letter
+# of each word capitalized.
+print(np.char.title('hello how are you?'))      # Hello How Are You?
+
+# numpy.char.lower(): This function returns an array with elements converted to lowercase. It calls
+# str.lower for each element.
+print(np.char.lower(['HELLO','WORLD']))         # ['hello' 'world']
+
+# numpy.char.upper(): This function calls str.upper function on each element in an array to return
+# the uppercase array elements.
+print(np.char.upper('hello'))                   # HELLO
+
+# numpy.char.split(): This function returns a list of words in the input string. By default, a whitespace
+# is used as a separator
+print(np.char.split('Omkar Pathak'))            # ['Omkar', 'Pathak']
+print(np.char.split('2017-02-11', sep='-'))     # ['2017', '02', '11']
+
+# numpy.char.join(): This method returns a string in which the individual characters are joined by
+# separator character specified.
+print(np.char.join(':','dmy'))                  # d:m:y