I will use these in the example below to check if the string is empty or not.# Consider the empty string without spaces first = "" if(len(first) == 0): print("Empty string") else: print("Not empty string") # Consider the empty string with spaces second = " " if(len(second) ...
assertvariable,"Variable is empty" 1. 如果variable为空,则会抛出AssertionError异常,并输出"Variable is empty"。 步骤四:完整代码示例 下面是一个完整的示例代码,演示如何使用断言来判断变量不为空: defcheck_variable(variable):assertvariable,"Variable is empty"print("Variable is not empty")# 测试代码check...
In Python, Check if Variable Is None and Check if Variable Is null have same solutions as meaning of both queries is same. 1. Introduction In Python Programming, checking when a variable is None(Python equivalent of null or nil in other languages) is a common task, particularly in functions...
To check if a string is empty or whitespace using the len() function in Python, we will use the following steps.First, we will find the length of the input string using the len() function. We will store the length in a variable str_len. Now, we will check if the length of the...
在这个任务中,我们需要检查变量是否为空,可以使用is关键字和None进行判断。None是Python中表示空值的特殊对象。 ifvariableisNone:# 变量为空的操作pass 1. 2. 3. Step 2: 跳过为空的变量 如果变量为空,我们需要跳过接下来的操作。在Python中,可以使用continue语句来跳过循环的当前迭代,继续下一次迭代。
First, we define a function calledIf_TextFileEmpty()and create a variable calledmy_fileinside the function. We will call thePath()class and define a file’s path; we putrbefore the string to avoid a unicode error. my_file=Path(r"C:\Users\Dell\Desktop\demo\files\Mytextfile.txt") ...
Python program to check if a variable is either a Python list, NumPy array, or pandas series# Importing pandas package import pandas as pd # Importing numpy package import numpy as np # Creating a list l = [1, 2, 3, 4, 5] # Creating a numpy array arr = np.arra...
In this post, we will see what is a string in Python and how to check whether a given variable is a string or not. Table of Contents [hide] How to check if a given variable is of the string type in Python? Using the isinstance() function. Using the type() function. Check if ...
To achieve our goal, we’ll use theindexmethod which is a function associated with a specific class and serves for a certain function when attached to a variable following a dot. Theindexmethod in particular, returns the index of the given substring, inside the string.The substring that we ...
TheNonevalue in Python is used to signify an “empty” value. It’s similar to theNULLvalue in other programming languages. This tutorial shows how to use the three methods mentioned above to check if a variable isNone. 1. Using theisoperator keyword ...