numpy string operations | isdecimal() function Last Updated : 14 Jan, 2019 Comments Improve Suggest changes Like Article Like Report numpy.core.defchararray.isdecimal(arr) function returns True for each element if there are only decimal characters in the element.It returns false otherwise. Parameters: arr : array_like of str or unicode. Returns : [ndarray] Output array of bools. Code #1 : Python3 # Python program explaining # numpy.char.isdecimal() method import numpy as geek # input array contains only digits in_arr = geek.array([ '1000', '2000'] ) print ("Input array : ", in_arr) out_arr = geek.char.isdecimal(in_arr) print ("Output array: ", out_arr) Output: Input array : ['1000' '2000'] Output array: [ True True] Code #2 : Python3 # Python program explaining # numpy.char.isdecimal() method import numpy as geek # input array contains digits along with space and alphabets in_arr = geek.array([ '1000 2', 'a1000', '1234 ab'] ) print ("Input array : ", in_arr) out_arr = geek.char.isdecimal(in_arr) print ("Output array: ", out_arr) Output: Input array : ['1000 2' 'a1000' '1234 ab'] Output array: [False False False] Comment More infoAdvertise with us Next Article numpy string operations | isdecimal() function J jana_sayantan Follow Improve Article Tags : Python Python-numpy Python numpy-String Operation Practice Tags : python Similar Reads numpy string operations | isdigit() function numpy.core.defchararray.isdigit(arr) function returns True for each element if all characters in the string are digits and there is at least one character; returns false otherwise. Parameters: arr : array_like of str or unicode. Returns : [ndarray] Output array of bools. Code #1 : Python3 # Python p 1 min read numpy string operations | isnumeric() function numpy.core.defchararray.isnumeric(arr) function returns true for each element if there are only numeric characters and there is at least one character.It returns false otherwise. Parameters: arr : array_like of str or unicode. Returns : [ndarray] Output array of bools. Code #1 : Python3 # Python pro 1 min read Python string isdecimal() Method In Python, the isdecimal() method is a quick and easy way to check if a string contains only decimal digits. It works by returning True when the string consists of digits from 0 to 9 and False otherwise. This method is especially useful when we want to ensure that user inputs or string data are stri 3 min read Python | Pandas Series.str.isdecimal() Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric Python packages. Pandas is one of those packages and makes importing and analyzing data much easier. Pandas isdecimal() is used to check whether all characters in a string are decimal. Th 2 min read Python String isalnum() Method The isalnum() method is a string function in Python that checks if all characters in the given string are alphanumeric. If every character is either a letter or a number, isalnum() returns True. Otherwise, it returns False. For Example:Pythons = "Python123" res = s.isalnum() print(res)OutputTrue Exp 2 min read Like