
EOL stands for “End of Line”. The SyntaxError EOL indicates an error where “Python reached the end of the line, but you were still in the middle of a string.”
Cause 1: Missing Closing Quote (Most Common)
You started a string with ", but forgot to put one at the end before hitting Enter.
# CRASH! Missing the quote after 'world!' message = "Hello, world!
Cause 2: Trying to make a multi-line string incorrectly
Standard strings in Python cannot go across multiple lines.
Problem Code:
my_text = "This is line one and this is line two" # CRASH! EOL error.
The Fix (Triple Quotes): If you need text across multiple lines, you MUST use triple quotes (""" or ''').
my_text = """This is line one and this is line two. This works perfectly!"""





![3D illustration of a file path blocked by illegal characters causing an OSError [Errno 22] Invalid Argument in Python.](https://pythonprohub.com/wp-content/uploads/2026/01/fix-oserror-errno-22-invalid-argument-file-paths-768x429.png)