Typeerror expected str bytes or os.pathlike object not list

In this article, we are going to be dealing with typeerror expected str bytes or os.pathlike object not list.

We will learn about this error, comprehend it, and discover a solution.

Let us start by knowing and understanding this error.

What is typeerror expected str bytes or os.pathlike object not list?

The typeerror expected str bytes or os.pathlike object not list is an error message that occurs in Python.

The cited error is triggered when we pass a list to a function or operation that expects a string, bytes, or path-like object.

What does this error mean?

This error means that the program received a data type that it did not expect.

Here is a sample code that triggers the error:

f_paths = ['/path/to/sample.txt', '/path/to/sample1.txt', '/path/to/sample2.txt']

with open(f_paths, 'r') as f:
    file = f.read()
    print(file)

Error:

Traceback (most recent call last):
  File "C:\Users\path\PyProjects\sProject\main.py", line 3, in <module>
    with open(f_paths, 'r') as f:
         ^^^^^^^^^^^^^^^^^^
TypeError: expected str, bytes or os.PathLike object, not list

Typeerror expected str bytes or os.pathlike object not list – SOLUTION

To fix the typeerror expected str bytes or os.pathlike object not list follow the guide below.

✔ Ensure that the input type we pass to a function or operation is the one it is expecting.

Iterate over the list, then apply the function to each path individually.

Do this if you pass a list of paths to a function that expects a single path.

Sample code

import os

paths = ['/path/to/sample.txt', '/path/to/sample1.txt', '/path/to/sample2.txt']

for path in paths:
    os.remove(path)

As an alternative, you can use the appropriate method to convert a list of routes into a string or bytes object if you need to give it to a function or operation.

Sample code

import os

paths = ['/path/to/sample.txt', '/path/to/sample1.txt', '/path/to/sample2.txt']

path_string = os.path.pathsep.join(paths)

with open(path_string, 'r') as f:
    c = f.read()
    print(c)

See also: Typeerror expected str bytes or os.pathlike object not nonetype

Tips to avoid getting Typeerrors

The following are some tips to avoid getting type errors in Python.

• Avoid using the built-in data types in Python in the wrong way.

  → Be sure that your variables and data structures are using the correct data types.

• Always check or confirm the types of your variables.

  → To check the types of your variables, use the type() function.

  This will allow you to confirm if the type of your variable is appropriate.

• Be clear and concise when writing code.

  → Being clear and concise when writing your code can help you avoid typeerrors.

  It is because it will become easier to understand.

• Handle the error by using try-except blocks.

  → Try using the try-except blocks to catch and handle any typeerror.

• Use the built-in functions of Python if needed.

  → Use built-in functions such as int(), str(), etc. if you need to convert a variable to a different type.

FAQs

Understanding int/str/float TypeErrors

Python separates numeric types from strings strictly. Concatenating, comparing, and arithmetic across type boundaries requires explicit conversion.

Common triggers

• User input is always str. input() always returns str. Wrap with int() or float().
• CSV cells are all str. Even numeric-looking columns are strings until converted.
• JSON numbers vs str. json.loads preserves the JSON type — but only “123” as string in the JSON becomes str in Python.
• Format string mismatch. "%d" % "5" raises TypeError. Use int("5") first.
• Compare int and str. Python 3 fails on "1" < 2. Convert one side first.

Diagnostic pattern

# BAD — user input treated as int
age = input("Enter your age: ")
if age >= 18:  # TypeError: '>=' not supported between 'str' and 'int'
    print("Adult")

# GOOD — convert first, guard failure
try:
    age = int(input("Enter your age: "))
except ValueError:
    print("Invalid age")
    age = 0

if age >= 18:
    print("Adult")

Best practices

• Convert at boundaries. Convert input, config values, and API responses to the right type immediately after loading.
• Use pydantic or dataclasses. Modern data validation libraries convert and check types automatically.
• Avoid == across types. Compare like-to-like.

Conclusion

In conclusion, the typeerror expected str bytes or os.pathlike object not list is an error message that occurs in Python.

You can fix this error by ensuring that the input type you pass to a function or operation is the one it is expecting.

By following the guide above, you will surely solve this error quickly.

That is all for this tutorial, IT source coders!

We hope you have learned a lot from this. Have fun coding!

Thank you for reading! 😊

Elijah Galero

Programmer & Technical Writer at PIES IT Solution

Elijah Galero is a programmer and writer at PIES IT Solution, author of 175+ tutorials at itsourcecode.com. Specializes in Python error debugging (AttributeError, TypeError, ModuleNotFoundError), Python programming tutorials, and Microsoft Excel how-to guides for BSIT students and productivity learners.

Expertise: Python · Python Errors · Python AttributeError · Python TypeError · ModuleNotFoundError · MS Excel · MS PowerPoint
 · View all posts by Elijah Galero →