这个更好，因为它从调用者那里获取全局变量和局部变量:

import sys
def execfile(filename, globals=None, locals=None):
    if globals is None:
        globals = sys._getframe(1).f_globals
    if locals is None:
        locals = sys._getframe(1).f_locals
    with open(filename, "r") as fh:
        exec(fh.read()+"\n", globals, locals)

您只需读取文件并自己执行代码。2to3电流替换

execfile("somefile.py", global_vars, local_vars)

as

with open("somefile.py") as f:
    code = compile(f.read(), "somefile.py", 'exec')
    exec(code, global_vars, local_vars)

(并不严格需要compile调用，但它将文件名与code对象关联起来，使调试更容易一些。)

See:

http://docs.python.org/release/2.7.3/library/functions.html#execfile http://docs.python.org/release/3.2.3/library/functions.html#compile http://docs.python.org/release/3.2.3/library/functions.html#exec

注意，如果使用PEP-263编码声明，上述模式将失败 不是ASCII或utf-8。您需要找到数据的编码，并对其进行编码 在将其交给exec()之前。

class python3Execfile(object):
    def _get_file_encoding(self, filename):
        with open(filename, 'rb') as fp:
            try:
                return tokenize.detect_encoding(fp.readline)[0]
            except SyntaxError:
                return "utf-8"

    def my_execfile(filename):
        globals['__file__'] = filename
        with open(filename, 'r', encoding=self._get_file_encoding(filename)) as fp:
            contents = fp.read()
        if not contents.endswith("\n"):
            # http://bugs.python.org/issue10204
            contents += "\n"
        exec(contents, globals, globals)

根据文档，而不是

execfile("./filename") 

Use

exec(open("./filename").read())

See:

Python 3.0有什么新特性

这是我所拥有的(在两个例子中，file已经被分配到带有源代码的文件的路径):

execfile(file)

下面是我用它替换的:

exec(compile(open(file).read(), file, 'exec'))

我最喜欢的部分是:第二个版本在Python 2和3中都工作得很好，这意味着不需要添加版本相关的逻辑。

这个更好，因为它从调用者那里获取全局变量和局部变量:

import sys
def execfile(filename, globals=None, locals=None):
    if globals is None:
        globals = sys._getframe(1).f_globals
    if locals is None:
        locals = sys._getframe(1).f_locals
    with open(filename, "r") as fh:
        exec(fh.read()+"\n", globals, locals)