I've added comment and test (New path file in attachment)，the test results
look fine.

#+BEGIN_SRC sh
$ make BTEST_RE="test-ob-python" test-dirty
...
selected tests: test-ob-python
Running 7 tests (2018-04-03 16:51:31+0800)
executing Python code block...
Code block evaluation complete.
   passed  1/7  test-ob-python/colnames-nil-header-argument
executing Python code block...
Code block evaluation complete.
   passed  2/7  test-ob-python/colnames-no-header-argument
executing Python code block...
Code block evaluation complete.
   passed  3/7  test-ob-python/colnames-no-header-argument-again
executing Python code block...
Code block evaluation complete.
   passed  4/7  test-ob-python/colnames-yes-header-argument
executing Python code block...
Code block evaluation complete.
   passed  5/7  test-ob-python/colnames-yes-header-argument-again
executing Python code block...
Code block evaluation complete.
   passed  6/7
test-ob-python/insert-necessary-blank-line-when-sending-code-to-interpreter
executing Python code block...
Code block evaluation complete.
   passed  7/7  test-ob-python/session-multiline

Ran 7 tests, 7 results as expected (2018-04-03 16:51:33+0800)
#+END_SRC

Nicolas Goaziou <mail@nicolasgoaziou.fr>于2018年4月3日 周二上午2:56写道：

> Hello,
>
> qijian gong <gongqijian@gmail.com> writes:
>
> > I've written this patch to fix the syntax error alarm caused by
> evaluating
> > the following code block:
> >
> > #+BEGIN_SRC python :session
> > if True:
> >     1
> > 2
> > #+END_SRC
>
> Thank you.
>
> Could you add a test in "test-ob-python.el"? Could you also add
> a comment explaining what you are doing?
>
> > +        (let ((curr-indent (string-match "[^\s]" line)))
>
>   (string-match "\\S-" line)
>
> Regards,
>
> --
> Nicolas Goaziou
>