javascript - Python-spidermonkey : How to get a line num. 错误

Question

如何检索发生错误的行号？

在下一个脚本中，该行输出(作为最后一次加注的结果)，但没有行号。在 JSError 对象中。

from spidermonkey import Runtime, JSError

runtime = Runtime()
context = runtime.new_context()

try:
    context.execute( "function test(){ return 'OK' }; \n\ntest2()" )
except JSError as e:
    print "ERROR!"
    print "args = {0}".format( e.args )
    print "message = {0}".format( e.message )
    print "__dict__ = {0}".format( e.__dict__ )
    raise

结果:

ERROR!
args = ('ReferenceError: test2 is not defined',)
message = ReferenceError: test2 is not defined
__dict__ = {}
Traceback (most recent call last):
  File "test.py", line 7, in <module>
    context.execute( "function test(){ return 'OK' }; \n\ntest2()" )
  File "<anonymous JavaScript>", line 3, in JavaScript code
spidermonkey.JSError: ReferenceError: test2 is not defined

Answer 1

如果您只需要行号，可以从 traceback.extract_tb 检索它功能。

import sys, traceback
from spidermonkey import Runtime, JSError

runtime = Runtime()
context = runtime.new_context()

try:
    context.execute( "function test(){ return 'OK' }; \n\ntest2()" )
except JSError as e:
    info = sys.exc_info()

    print "ERROR!"
    for file, lineno, function, text in traceback.extract_tb(info[2]):
        print "line #", lineno, ": ", text