python创建可变变量的方法

>>> dct = {'x': 1, 'y': 2, 'z': 3}

>>> dct

{'y': 2, 'x': 1, 'z': 3}

>>> dct["y"]

2

>>> x = "spam"

>>> z = {x: "eggs"}

>>> z["spam"]

'eggs'

var1 = 'foo'

var2 = 'bar'

var3 = 'baz'

...

lst = ['foo', 'bar', 'baz']

print(lst[1])           # prints bar, because indices start at 0

lst.append('potatoes')  # lst is now ['foo', 'bar', 'baz', 'potatoes']