a SyntaxError must be look like:

File "main.py", line 7
    print("hello world"
                      ^
SyntaxError: unexpected EOF while parsing

but instead of this i'm get this:

File "main.py", line 3

                           ^
SyntaxError: unexpected EOF while parsing

It seems to me that this problem is only in windows.

Without some example code, there's no way to really tell what's going on here.  In particular, it's suspicious that you're expecting an error on line 7 but seeing one on line 3.

Can you attach your `main.py` file to the issue?

here attached file with SyntaxError

About of numbers of line. I tested on different files and i forget change number of line.

Indeed, the exception has the correct line number when compiling manually:


>>> try:
...     compile('if __name__ == "__main__":\n   print("hello world"\n', '<string>', 'exec')
... except SyntaxError as e:
...     print(e.lineno)
...
2


but not when running `python3 main.py`:
  File "main.py", line 3

                          ^
SyntaxError: unexpected EOF while parsing



I tried with all version of Python >= 3.6 and Python2 and they all exhibit the same behavior.

I don't think it's true that the lineno is correct when compiling a string (Remi's string is just too short):

>>> try:
...     compile('if __name__ == "__main__":\n   print("hello world"\n   x=5\n', '<string>', 'exec')
... except SyntaxError as e:
...     print("e.lineno=", e.lineno)
...     print("e.offset=", e.offset)
...     print("e.text=", e.text)
...
e.lineno= 3
e.offset= 4
e.text=    x=5
>>>


Arguably the syntax error is on line 3. Line 2 can be complemented by a line 3 that will make it valid.

Whatever the situation was last May, current 3.10 now results in a correct and improved traceback ending in

  File "F:\Python\a\tem4.py", line 2
    print("hello world"
         ^
SyntaxError: '(' was never closed

Same if \n or additional text is added to the file without closing ')'.