if not None or not '': print('Not empty!') The first condition is if “not None”, which evaluates to True. The second condition is “or not ””, which also evaluates to True. Therefore, the entire expression evaluates to True and the print statement is executed. Not none In Pytho...
my_var = None result = "No Value" if my_var is None else "Has Value" #Output: No Value # Using in list comprehensions my_list = [1, None, 3, None] none_filtered = [x for x in my_list if x is not None] #Output: [1, 3] It allows more readable and concise None checks ...
Thenotoperator is a logical operator that returnsTrueif the value or expression isFalse, andFalseif the value or expression isTrue. So if we specify not before the string in the if condition, It will become True when the string is empty and False when the string is not empty. # Consider...
foo =Noneiffoo is None: print("is None")iffoo ==None: print("also none") Using 'is' can be better when check is None or not, because 'is' is doing id comparsion: id(foo) == id(None) It is much faster check '==' it does a deep looking for the value....
Enter a number: 0 Zero A number is positive if it is greater than zero. We check this in the expression of if. If it is False, the number will either be zero or negative. This is also tested in subsequent expression.Also Read: Python Program to Check if a Number is Odd or Even ...
Now, how do we know if the input is actually a numerical value? In Python, we can check if an input is a number or a string: Using in-built methods likesisdigit()orisnumeric(), which can determine if the user input is a number or not. Or ...
x="abc"ifx==None:print("Value of x is None")else:print("x is not None") However, most people would recommend you to useisinstead of==because theiskeyword is faster than the equality operator. Theiskeyword doesn’t check for the value of the operands. It simply sees if the two opera...
If we had code that requires a string to work correctly but lacked type hints, which are optional, how can we avoid errors if the variable used is not a string? In this tutorial, we'll take a look at how to check if a variable is a string in Python, using the type() and isinsta...
This method returns the difference of both collections and 0 (falsy value ) if they are identical.Using this result we can check if both tuple lists are identical or not.Note: The cmp() method is supported in Python 2. # Python program to check if two lists of # tuples are identical...
When we analyze a series, each value can be considered as a separate row of a single column.And, NumPy is an array processing package which provides high-performance multidimensional array.Problem statementGiven a variable, we have to check if a variable is either a Python l...