The Python Numpy string functions are used to alter the given string as per your requirement. The Numpy string functions are add, multiply, capitalise, title, upper, lower, centre, split, splitlines, strip, join, replace, encode and decode. For instance, Numpy upper function converts string to uppercase.
The following list of examples helps you understand these Python Numpy string functions.
Python Numpy add
The python Numpy add function is used for string concatenation. In this example, we are using this Numpy add function to add two strings
import numpy as np print('Numpy String concatenation') print(np.char.add(['Tutorial'], ['Gateway']))
OUTPUT
This time we declared two different strings. Next, we used this Numpy char add function
import numpy as np fname = 'Suresh' company = ' Tutorial Gateway' print('Numpy String concatenation') print(np.char.add([fname], [company]))
OUTPUT
Here, we are concatenating a string variable and a string
import numpy as np fname = 'Suresh' print('Numpy String concatenation') print(np.char.add([fname], [' Working at Tutorial Gateway']))
OUTPUT
Python Numpy multiply
The Python Numpy multiply function is used to multiply or repeat a given string for specified number of times. In this example, p.char.multiply(‘hello ‘, 2) repeats hello string for twice
import numpy as np print('---Numpy String multiply---') print(np.char.multiply('hello ', 2)) print('-------') fname = 'Numpy ' print(np.char.multiply(fname, 4)) print(np.char.multiply(fname, 6))
OUTPUT
Python Numpy capitalize
The Python Numpy capitalise function is used to capitalise or uppercase the first letter in a complete string
import numpy as np print('---Numpy String capitalize---') print(np.char.capitalize('hello')) print(np.char.capitalize('hello world')) print('-------') fname = 'numpy' company = 'tutorial gateway' print(np.char.capitalize(fname)) print(np.char.capitalize(company))
OUTPUT
Python Numpy title
The Python Numpy title function is used to convert the first letter of each word to uppercase
import numpy as np print('---Numpy String title---') print(np.char.title('hello')) print(np.char.title('hello world')) print(np.char.title('hi, how are you?')) print('-------') name = 'python' company = 'tutorial gateway' print(np.char.title(name)) print(np.char.title(company))
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Python Numpy upper
The Python Numpy upper function converts all the letters in a string to uppercase
import numpy as np print('---Numpy String upper---') print(np.char.upper('hello')) print(np.char.upper('hello world')) print(np.char.upper('hi, how are you?')) print('\n---Uppercase example 2----') name = 'python' company = 'tutorial gateway' print(np.char.upper(name)) print(np.char.upper(company))
OUTPUT
Python Numpy lower
Python Numpy lower converts all the characters in a string to lowercase
import numpy as np print('---Numpy String lower---') print(np.char.lower('HI, HOW DO YOU DO?')) print(np.char.lower('HELLO WORLD')) print(np.char.lower('WELCOME')) print('\n---Lowercase example 2----') name = 'PYTHON' company = 'WELCOME TO TUTORIAL GATEWAY' print(np.char.lower(name)) print(np.char.lower(company))
OUTPUT
Python Numpy center
The Python Numpy center is for padding a string. The basic syntax of the Numpy center
np.char.center(‘string’, length, ‘char’)
If the given length is less than the original string length then it will remove the extra characters from the original string (trim)
If length is greater than the original string length then those extra spaces will be filled with the given character. As the name suggests, original string will be in center position
import numpy as np print('---Numpy String center---') print(np.char.center('Hello', 11, '*')) print(np.char.center('Welcome', 20, '#')) print(np.char.center('Hello', 4, '*')) print('\n---Numpy char center example----') name = 'Python' company = 'TutorialGateway' print(np.char.center(name, 30, '@')) print(np.char.center(company, 50, '$')) print(np.char.center(company, 10, '$'))
OUTPUT
Python Numpy strip
The Python Numpy strip removes empty spaces from Both the right and left side of a given string
import numpy as np msg1 = ' Hello' msg2 = 'Python ' msg3 = ' Hello World ' print('Original Message = ', msg1) print('Strip Left = ', np.char.strip(msg1)) print('\nOriginal Message = ', msg2) print('Strip Right = ', np.char.strip(msg2)) print('\Original Message = ', msg3) print('Strip Left & Right = ', np.char.strip(msg3))
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Python Numpy split
Python Numpy split function splits the given string based on the specified separator
import numpy as np print('---Numpy String split---') print(np.char.split('Hello World', sep = ' ')) print(np.char.split('hi,how are you?', sep = ' ')) print(np.char.split('hi,Python,Program', sep = ',')) print('\n----Numpy char split---') msg = 'Welcome to Tutorial Gateway' print(np.char.split(msg, sep = ' ')) msg2 = '[email protected]@[email protected]@Gateway' print(np.char.split(msg2, sep = '@'))
OUTPUT
Python Numpy splitlines
This Python Numpy splitlines retunes a list of lines in a given string. This will consider the line breaks \n and \r.
import numpy as np msg = 'Hello\nWorld' print(msg) print('-- Numpy splitlines output----') print(np.char.splitlines(msg)) print() msg1 = 'Hi\rHow are you?' print(msg1) print('-- Numpy splitlines output----') print(np.char.splitlines(msg1)) print() msg2 = 'Hi\rHow are \nyou?' print(msg2) print('-- Numpy splitlines output----') print(np.char.splitlines(msg2)) print('\n---Numpy String splitlines---') print(np.char.splitlines('Hello\nWorld'))
OUTPUT
Python Numpy join
The Python Numpy join function joins the specified character(first Argument) after each any every character in a given string
import numpy as np print('---Numpy String join---') print(np.char.join(':', 'HMS')) print(np.char.join('/', 'dmy')) print(np.char.join('-', 'dmy')) print(np.char.join(' ', 'HelloWorld')) print('\n----Numpy char join---') print(np.char.join(['-', ':'], ['dmy', 'mdy'])) print(np.char.join(['@', '$', ':'], ['Hi', 'Hello', 'HMS']))
OUTPUT
Python Numpy replace
The Python Numpy replace function is used to replace the substring with new string
np.char.replace(original_string, old_string, new_string)
The Numpy replace function search for old string in a original string. If it finds, Numpy replace function will replace with new_string
import numpy as np print(np.char.replace('Hello', 'l', 'K')) print(np.char.replace('tutorial', 't', 'M')) print(np.char.replace('oh boy! welcome to you', 'o', 'X')) print(np.char.replace('oh boy! welcome to you', 'o', 'SSh'))
OUTPUT
This is an another example of Numpy string replace function
import numpy as np msg1 = 'Hello World' msg2 = 'xyz working in xyz position at xyz company' print('Original Message = ', msg1) print('Repalce l with T = ', np.char.replace(msg1, 'l', 'T')) print('Repalce o with HMS = ', np.char.replace(msg1, 'o', 'HMS')) print('\nOriginal Message = ', msg2) print('Repalce o with T = ', np.char.replace(msg2, 'o', 'T')) print('Repalce xyz with abc = ', np.char.replace(msg2, 'xyz', 'abc'))
OUTPUT
Python Numpy encode
The Python Numpy encode is used to encode the string using the specified encoder. Here, np.char.encode(‘Hello’, ‘cp500’) encode Hello string using cp500
import numpy as np print('---Numpy String encode---') print(np.char.encode('Hello', 'cp500')) print(np.char.encode('Hello', 'utf_16')) print(np.char.encode('How are You?', 'cp500')) print(np.char.encode('Welcome again!', 'utf_16')) print('\n---Numpy char encode----') name = 'Python' company = 'Tutorial Gateway' print(np.char.encode(name, 'cp500')) print(np.char.encode(name, 'utf_16')) print(np.char.encode(name, 'utf_16_le')) print(np.char.encode(company, 'cp500')) print(np.char.encode(company, 'utf_16')) print(np.char.encode(company, 'utf_16_be'))
OUTPUT
Python Numpy decode
The Python Numpy decode is used to decode the already encoded (Numpy encode) string. Here, you have to specify the code that have to use for decoding a message. If you use wrong code then it will throw an error
import numpy as np print('---Numpy String decode---') print(np.char.decode(b'\xc8\x85\x93\x93\x96', 'cp500')) print('\n---Numpy char decode----') name = b'\xd7\xa8\xa3\x88\x96\x95' company = b'\xe3\xa4\xa3\x96\x99\x89\x81\[email protected]\xc7\x81\xa3\x85\xa6\x81\xa8' print(np.char.decode(name, 'cp500')) print(np.char.decode(company, 'cp500')) print('\n---Numpy char decode----') name = 'Python Numpy' ecode = np.char.encode(name, 'cp500') dcode = np.char.decode(ecode, 'cp500') print('Original Message = ', name) print('Encoded Message = ', ecode) print('Decoded Message = ', dcode)
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