Error Explanation: AttributeError: ‘str’ object has no attribute ‘isin’
This error occurs when you try to use the isin() method on a string object in Python, which is not a valid method for strings.
Example:
Let’s look at an example to understand the error:
string_var = "Hello, World!"
if string_var.isin("Hello"):
print("Substring found")
else:
print("Substring not found")
In the above example, we are trying to use the isin() method on the string_var variable to check if the substring “Hello” exists in the string. However, this method doesn’t exist for strings in Python, hence the error.
Solution:
To check if a substring exists within a string in Python, you can use the in operator. Here’s an updated version of our example:
string_var = "Hello, World!"
if "Hello" in string_var:
print("Substring found")
else:
print("Substring not found")
In the above code, we use the in operator to check if the substring “Hello” is present in the string_var. This is the correct way to check for substring existence in Python.