SyntaxError: invalid syntax

What you see

whille True:
    print("tick")

  File "/home/me/project/main.py", line 1
    whille True:
    ^^^^^^
SyntaxError: invalid syntax. Did you mean 'while'?

What it means

The parser reached a point where no valid Python could continue, and stopped. The caret under the line shows where it stopped, which is the first place it noticed, not always where the mistake is. Look at the marked spot, then at what comes before it, including the previous line.

"Invalid syntax" is the parser's last resort. Since Python 3.10 most common mistakes get a specific message instead, and Python 3.14 suggests the keyword you probably meant, as in this example.

Why it happens

• A misspelled keyword, such as whille, fro or esle.
• A missing comma between items in a list, a tuple or a call. From 3.10 the message adds "Perhaps you forgot a comma?".
• A shell command in a Python file or at the >>> prompt. pip install requests and python main.py are commands for the terminal, not Python code.
• = where == was meant, inside an if.
• Python 2 code, such as print "hello". Python 3 answers with "Missing parentheses in call to 'print'".
• An unclosed bracket or quote on an earlier line, which makes the parser read on into the next one.

How to fix it

Read the caret, then the line above it. If the line looks fine, check that every bracket and quote opened before it is closed.

For a command such as pip install, leave Python first. At the >>> prompt type exit(), then run the command in the terminal:

python3 -m pip install requests

Running a recent Python helps by itself: 3.10 and later replace many "invalid syntax" errors with a message that names the problem.

Example: a missing comma

point = (3 4)

  File "/home/me/project/main.py", line 1
    point = (3 4)
             ^^^
SyntaxError: invalid syntax. Perhaps you forgot a comma?

Run on CPython 3.9.6, 3.10.22, 3.11.17, 3.12.15, 3.13.17, 3.14.9 and 3.15.1, on October 25, 2026.

Example: a terminal command in a Python file

pip install requests

  File "/home/me/project/main.py", line 1
    pip install requests
        ^^^^^^^
SyntaxError: invalid syntax

Run on CPython 3.9.6, 3.10.22, 3.11.17, 3.12.15, 3.13.17, 3.14.9 and 3.15.1, on October 25, 2026.

How each Python version words it

Run on CPython 3.9.6, 3.10.22, 3.11.17, 3.12.15, 3.13.17, 3.14.9 and 3.15.1, on October 25, 2026.

The keyword suggestion is new in 3.14. The missing-comma hint dates from 3.10. A shell command still gets the plain "invalid syntax" everywhere.