格式化dict keys:attributeRor:“dict”对象没有属性“keys（）”

Question

用字符串格式化dict键的正确方法是什么？

当我这样做时：

>>> foo = {'one key': 'one value', 'second key': 'second value'}
>>> "In the middle of a string: {foo.keys()}".format(**locals())

我期望的是：

"In the middle of a string: ['one key', 'second key']"

我得到的是：

Traceback (most recent call last):
  File "<pyshell#4>", line 1, in <module>
    "In the middle of a string: {foo.keys()}".format(**locals())
AttributeError: 'dict' object has no attribute 'keys()'

但正如你所见，我的字典有钥匙：

>>> foo.keys()
['second key', 'one key']

Answer 1

"In the middle of a string: {}".format([k for k in foo])