Thinking...
The user wants me to write a Python function `is_palindrome(s)` that checks
checks if a string is a palindrome, along with one test case.
A simple approach: compare the string with its reverse.
...done thinking.
```python
def is_palindrome(s):
return s == s[::-1]
# Test
assert is_palindrome("racecar") is True
assert is_palindrome("hello") is False
print(is_palindrome("racecar")) # prints: True
```