numpy string operations | isnumeric() function Last Updated : 14 Jan, 2019 Comments Improve Suggest changes Like Article Like Report 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 program explaining # numpy.char.isnumeric() method import numpy as geek # input array contains only numeric character in_arr = geek.array([ '1000', '2000'] ) print ("Input array : ", in_arr) out_arr = geek.char.isnumeric(in_arr) print ("Output array: ", out_arr) Output: Input array : ['1000' '2000'] Output array: [ True True] Code #2 : Python3 # Python program explaining # numpy.char.isnumeric() method import numpy as geek # input array in_arr = geek.array([ 'python3.5', 'a1000', '1234 ab'] ) print ("Input array : ", in_arr) out_arr = geek.char.isnumeric(in_arr) print ("Output array: ", out_arr) Output: Input array : ['python3.5' 'a1000' '1234 ab'] Output array: [False False False] Comment More infoAdvertise with us Next Article numpy string operations | isnumeric() function 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 | isdecimal() function 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 # num 1 min read numpy string operations | isalpha() function numpy.core.defchararray.isalpha(arr) function returns True for each element if all characters in the string are alphabetic 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 # Pyth 1 min read Python String isnumeric() Method The isnumeric() method is a built-in method in Python that belongs to the string class. It is used to determine whether the string consists of numeric characters or not. It returns a Boolean value. If all characters in the string are numeric and it is not empty, it returns “True†If all characters i 3 min read numpy.isneginf() in Python The numpy.isneginf() function tests element-wise whether it is negative infinity or not, and returns the result as a boolean array. Syntax :  numpy.isneginf(array, y = None) Parameters : array : [array_like]Input array or object whose elements, we need to test for infinity. y : [array_like]A boole 2 min read Convert Strings to Numbers and Numbers to Strings in Python Converting strings to numbers and numbers to strings is a common task in Python. In this article, we’ll explore simple ways to convert between strings and numbers .Using int() and str()int() and str() functions in Python are commonly used for converting data types. The int() function changes a strin 3 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 Check If String is Integer in Python In this article, we will explore different possible ways through which we can check if a string is an integer or not. We will explore different methods and see how each method works with a clear understanding.Example:Input2 : "geeksforgeeks"Output2 : geeksforgeeks is not an IntigerExplanation : "gee 4 min read Convert String to Int in Python In Python, converting a string to an integer is important for performing mathematical operations, processing user input and efficiently handling data. This article will explore different ways to perform this conversion, including error handling and other method to validate input string during conver 3 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