‘str’ object has no attribute ‘isin’

Error: ‘str’ object has no attribute ‘isin’

The error message “AttributeError: ‘str’ object has no attribute ‘isin'” is encountered when trying to access the ‘isin’ attribute on a ‘str’ object (string) in Python. This error occurs because the ‘isin’ attribute is not a built-in attribute/method of a string in Python.

Example:

Let’s say we have a variable named “text” that is of type string, and we try to access the ‘isin’ attribute on it. Here’s an example of how this error can occur:

text = "Hello, world!"
result = text.isin("Hello")
  

In the above example, we are trying to use the ‘isin’ method on the ‘text’ string variable. However, the ‘isin’ method does not exist for strings in Python, resulting in the “AttributeError: ‘str’ object has no attribute ‘isin'” error.

Solution:

If you are trying to check if a certain substring exists within a string, you can use the ‘in’ keyword in Python. Here’s an example of how to do that:

text = "Hello, world!"
substring = "Hello"

if substring in text:
    print("Substring found!")
else:
    print("Substring not found.")
  

In the above example, we are using the ‘in’ keyword to check if the ‘substring’ variable exists within the ‘text’ variable. If it does, we print “Substring found!”, otherwise we print “Substring not found.” This approach is the correct way to check for substrings in Python.