What is a TypeError?
A TypeError is raised when an operation or function is applied to an object of an incorrect type. In other words, a TypeError is raised when a function or operation is applied to an object of an incorrect type.
There are many ways to see if an object is of the correct type. The most common is to use the type() function.
The following code will raise a TypeError because the add() function has been passed two strings, which cannot be added:
>>> add("1", "2") Traceback (most recent call last): File "<stdin>", line 1, in <module> TypeError: unsupported operand type(s) for +: 'str' and 'str'</p><br /><h2>What causes a TypeError?</h2><br /><p>
There are a number of reasons that can cause a TypeError. In Python, you will encounter this error when you try to do an operation on an object that is not of the expected type. For example, if you try to iterate over a list using a for loop, but the list contains an object that is not iterable, you will get this error. Other operations that can cause this error include trying to index into a list or tuple with an invalid index (i.e. a negative number or a number greater than the length of the list/tuple), or trying to call a function on an object that is not callable.
How can you fix a TypeError?
There are a few ways to fix a TypeError, depending on what is causing the error.
-If you are trying to iterate over a list or tuple and you get a TypeError, it is likely because you are trying to iterate over a function object. Functions are not iterable, so you cannot use them in a for loop. Instead, try using the range() function to create an iterable object:
for i in range(10):
-If you are getting a TypeError because you are trying to use a string as a number, you can try using the int() or float() functions to convert the string to a number:
-If you are trying to combine two objects and you get a TypeError, it is likely because the two objects are of different types and cannot be combined. For example, you cannot concatenate a string and an integer:
’42’ + 42 # This will give you a TypeError
You can fix this error by converting the integer to a string using the str() function:
’42’ + str(42) # This will give you the string ‘4242’
What are some common examples of TypeErrors?
TypeError: function is not iterable TypeError: object is not iterable