内存文件/流中的pylint

我想将pylint嵌入程序中。用户输入python程序（在Qt中，在QTextEdit中，尽管不相关），在后台，我调用pylint来检查他输入的文本。最后，我在消息框中打印错误。

因此，存在两个问题：首先，如何在不将输入的文本写入临时文件并将其提供给pylint的情况下执行此操作？我想在某个时候pylint（或astroid）处理流而不是文件了。

而且，更重要的是，这是一个好主意吗？会导致进口或其他物品出现问题吗？直觉上我不会说，因为它似乎产生了一个新的进程（带有epylint），但是我不是python专家，所以我真的不确定。如果我用这个来发射pylint，也可以吗？

编辑：我试图修补pylint的内部，事件与之抗争，但最终被卡在某个地方。

这是到目前为止的代码：

from astroid.builder import AstroidBuilder
from astroid.exceptions import AstroidBuildingException
from logilab.common.interface import implements
from pylint.interfaces import IRawChecker, ITokenChecker, IAstroidChecker
from pylint.lint import PyLinter
from pylint.reporters.text import TextReporter
from pylint.utils import PyLintASTWalker

class Validator():
    def __init__(self):
        self._messagesBuffer = InMemoryMessagesBuffer()
        self._validator = None
        self.initValidator()

    def initValidator(self):
        self._validator = StringPyLinter(reporter=TextReporter(output=self._messagesBuffer))
        self._validator.load_default_plugins()
        self._validator.disable('W0704')
        self._validator.disable('I0020')
        self._validator.disable('I0021')
        self._validator.prepare_import_path([])

    def destroyValidator(self):
        self._validator.cleanup_import_path()

    def check(self, string):
        return self._validator.check(string)


class InMemoryMessagesBuffer():
    def __init__(self):
        self.content = []
    def write(self, st):
        self.content.append(st)
    def messages(self):
        return self.content
    def reset(self):
        self.content = []

class StringPyLinter(PyLinter):
    """Does what PyLinter does but sets checkers once
    and redefines get_astroid to call build_string"""
    def __init__(self, options=(), reporter=None, option_groups=(), pylintrc=None):
        super(StringPyLinter, self).__init__(options, reporter, option_groups, pylintrc)
        self._walker = None
        self._used_checkers = None
        self._tokencheckers = None
        self._rawcheckers = None
        self.initCheckers()

    def __del__(self):
        self.destroyCheckers()

    def initCheckers(self):
        self._walker = PyLintASTWalker(self)
        self._used_checkers = self.prepare_checkers()
        self._tokencheckers = [c for c in self._used_checkers if implements(c, ITokenChecker)
                               and c is not self]
        self._rawcheckers = [c for c in self._used_checkers if implements(c, IRawChecker)]
        # notify global begin
        for checker in self._used_checkers:
            checker.open()
            if implements(checker, IAstroidChecker):
                self._walker.add_checker(checker)

    def destroyCheckers(self):
        self._used_checkers.reverse()
        for checker in self._used_checkers:
            checker.close()

    def check(self, string):
        modname = "in_memory"
        self.set_current_module(modname)

        astroid = self.get_astroid(string, modname)
        self.check_astroid_module(astroid, self._walker, self._rawcheckers, self._tokencheckers)

        self._add_suppression_messages()
        self.set_current_module('')
        self.stats['statement'] = self._walker.nbstatements

    def get_astroid(self, string, modname):
        """return an astroid representation for a module"""
        try:
            return AstroidBuilder().string_build(string, modname)
        except SyntaxError as ex:
            self.add_message('E0001', line=ex.lineno, args=ex.msg)
        except AstroidBuildingException as ex:
            self.add_message('F0010', args=ex)
        except Exception as ex:
            import traceback
            traceback.print_exc()
            self.add_message('F0002', args=(ex.__class__, ex))


if __name__ == '__main__':
    code = """
    a = 1
    print(a)
    """

    validator = Validator()
    print(validator.check(code))

追溯如下：

Traceback (most recent call last):
  File "validator.py", line 16, in <module>
    main()
  File "validator.py", line 13, in main
    print(validator.check(code))
  File "validator.py", line 30, in check
    self._validator.check(string)
  File "validator.py", line 79, in check
    self.check_astroid_module(astroid, self._walker, self._rawcheckers, self._tokencheckers)
  File "c:\Python33\lib\site-packages\pylint\lint.py", line 659, in check_astroid_module
    tokens = tokenize_module(astroid)
  File "c:\Python33\lib\site-packages\pylint\utils.py", line 103, in tokenize_module
    print(module.file_stream)
AttributeError: 'NoneType' object has no attribute 'file_stream'
# And sometimes this is added :
  File "c:\Python33\lib\site-packages\astroid\scoped_nodes.py", line 251, in file_stream
    return open(self.file, 'rb')
OSError: [Errno 22] Invalid argument: '<?>'

我明天继续挖掘。:)