PyShell.py 文件源码

def runsource(self, source):
        "Extend base class method: Stuff the source in the line cache first"
        filename = self.stuffsource(source)
        self.more = 0
        self.save_warnings_filters = warnings.filters[:]
        warnings.filterwarnings(action="error", category=SyntaxWarning)
        if isinstance(source, unicode) and IOBinding.encoding != 'utf-8':
            try:
                source = '# -*- coding: %s -*-\n%s' % (
                        IOBinding.encoding,
                        source.encode(IOBinding.encoding))
            except UnicodeError:
                self.tkconsole.resetoutput()
                self.write("Unsupported characters in input\n")
                return
        try:
            # InteractiveInterpreter.runsource() calls its runcode() method,
            # which is overridden (see below)
            return InteractiveInterpreter.runsource(self, source, filename)
        finally:
            if self.save_warnings_filters is not None:
                warnings.filters[:] = self.save_warnings_filters
                self.save_warnings_filters = None