Python:使用 lineno 引发 SyntaxError

Question

我正在为领域特定语言实现解析器，并希望能够引发 SyntaxError。引发此异常时如何设置文件名、行号和偏移量？

exception SyntaxError

Raised when the parser encounters a syntax error. This may occur in an import statement, in an exec statement, in a call to the built-in function eval() or input(), or when reading the initial script or standard input (also interactively).

Instances of this class have attributes filename, lineno, offset and text for easier access to the details. str() of the exception instance returns only the message.

来源:https://docs.python.org/3.2/library/exceptions.html#SyntaxError

Answer 1

答案是:

>>> raise SyntaxError('End quote missing', ("test.py", 1000, 11, "print 'bar"))                                                                             
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "test.py", line 1000
    print 'bar
              ^
SyntaxError: End quote missing

第二个参数需要是一个 4 元组。