The Fromkeys method of the python--dictionary creates the initial value with the memory address problem

The Fromkeys () function in Dict can use a list to create a dict with the same initial value.

1D = Dict.fromkeys (["Apple","Pineapple"], ['Apple','Pineapple'])2 Print(d)3D.get ("Apple"). Append ('Orange')4 Print(d)

{' Apple ': [' apple ', ' pineapple '], ' pineapple ': [' apple ', ' pineapple '}
{' Apples ': [' apple ', ' pineapple ', ' orange '], ' pineapple ': [' apple ', ' pineapple ', ' orange '}

Since the Fromkeys () function was created with value using the same element, the memory address is the same, so when one changes the other it will change.

The Fromkeys method of the python--dictionary creates the initial value with the memory address problem