numpy string operations | isdecimal() function Last Updated : 14 Jan, 2019 Summarize Comments Improve Suggest changes Share 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 | isnumeric() 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 Implement IsNumber() function in Python In this article we will see how to implement isNumber() method using Python. This method takes in a string as input and returns True or False according to whether the string is a number or not. Examples: Input : "12345" Output : True Input : "-12345" Output : True Input : "abc" Output : False Approa 2 min read Like