source.py 文件源码

def compile(self, filename=None, mode='exec',
                flag=generators.compiler_flag,
                dont_inherit=0, _genframe=None):
        """ return compiled code object. if filename is None
            invent an artificial filename which displays
            the source/line position of the caller frame.
        """
        if not filename or py.path.local(filename).check(file=0):
            if _genframe is None:
                _genframe = sys._getframe(1) # the caller
            fn,lineno = _genframe.f_code.co_filename, _genframe.f_lineno
            base = "<%d-codegen " % self._compilecounter
            self.__class__._compilecounter += 1
            if not filename:
                filename = base + '%s:%d>' % (fn, lineno)
            else:
                filename = base + '%r %s:%d>' % (filename, fn, lineno)
        source = "\n".join(self.lines) + '\n'
        try:
            co = cpy_compile(source, filename, mode, flag)
        except SyntaxError:
            ex = sys.exc_info()[1]
            # re-represent syntax errors from parsing python strings
            msglines = self.lines[:ex.lineno]
            if ex.offset:
                msglines.append(" "*ex.offset + '^')
            msglines.append("(code was compiled probably from here: %s)" % filename)
            newex = SyntaxError('\n'.join(msglines))
            newex.offset = ex.offset
            newex.lineno = ex.lineno
            newex.text = ex.text
            raise newex
        else:
            if flag & _AST_FLAG:
                return co
            lines = [(x + "\n") for x in self.lines]
            py.std.linecache.cache[filename] = (1, None, lines, filename)
            return co

#
# public API shortcut functions
#