If you are looking for a solution to the error AttributeError: ‘list’ object has no attribute ‘find’, here are the causes of the error and some ways you can use it to fix it. Details are below.
What causes the AttributeError: ‘list’ object has no attribute ‘find’?
The error happens because you call the find() method on the list instead of calling the method on the string.
Example:
listInfor = ['visit', 'learnshareit', 'website']
# Call the find() method on the list
print(listInfor.find('visit'))Output:
Traceback (most recent call last):
File "./prog.py", line 4, in <module>
AttributeError: 'list' object has no attribute 'find'How to solve the AttributeError: ‘list’ object has no attribute ‘find’?
Convert the list to a string using the find() method.
Example:
- If you have a list, you want to use the find() method and then convert that list to a string using the join() function.
listInfor = ['visit', 'learnshareit', 'website']
# Convert the list to a string by the join() function
newStr = ' '.join(listInfor)
print('The string converted to is:', newStr)
print(type(newStr))
# Call the find() method on the list
print('String to look for at the index:', newStr.find('visit'))Output:
The string converted to is: visit learnshareit website
<class 'str'>
String to look for at the index: 0Note: The find() method exception will occur if you pass in a string that does not exist. The function will return -1.
Example:
listInfor = ['visit', 'learnshareit', 'website']
# Convert the list to a string by the join() function
newStr = ' '.join(listInfor)
print('The string converted to is:', newStr)
print(type(newStr))
# Call the find() method on the list
print('String to look for at the index:', newStr.find('World Cup'))Output:
The string converted to is: visit learnshareit website
<class 'str'>
String to look for at the index: -1As you can see, ‘World Cup’ does not exist in the string, so the function returns -1.
Search for an element in the list.
A convenience of Python is that it has many built-in functions to assist users. Similar to the find() function for searching substrings on strings, the index() function list also has the same function on one’s own.
Syntax:
list.index(element)
The list.index() returns the index of the first occurrence of the search value.
Example:
- Create a list.
- Use the index() to return the index of the first occurrence of the search element.
listInfor = ['visit', 'learnshareit', 'website']
# Use the list.index() indicates the index of the first occurrence of the search element
print('Index of the search element:', listInfor.index('visit'))Output:
Index of the search element: 0Note: If the search value does not exist, the program will throw a ValueError error.
Example:
listInfor = ['visit', 'learnshareit', 'website']
# Use the list.index() indicates the index of the first occurrence of the search element
print('Index of the search element:', listInfor.index('Name'))Output:
Traceback (most recent call last):
File "./prog.py", line 4, in <module>
ValueError: 'Name' is not in list‘Name’ does not exist in the list, so when using the index() function, the program throws an error ValueError: ‘Name’ is not in list.
Summary
Through this article, you have an idea to fix the AttributeError: ‘list’ object has no attribute ‘find’ in Python. I suggest you use the list.index() function, so you don’t have to convert the list to a string. Leave a comment so I can know how you feel about the article. Thanks for reading!
Maybe you are interested:
- AttributeError: ‘NoneType’ object has no attribute ‘append’
- AttributeError: dict_keys object has no attribute ‘remove’
- AttributeError: ‘list’ object has no attribute ‘lower’
My name is Jason Wilson, you can call me Jason. My major is information technology, and I am proficient in C++, Python, and Java. I hope my writings are useful to you while you study programming languages.
Name of the university: HHAU
Major: IT
Programming Languages: C++, Python, Java
