.copy和.copy（）之间的区别

我正在使用熊猫，需要创建数据框的副本。

I used .copy and noticed that it came back retaining the information, but looking texty'

I then used .copy() and the new dataframe was returned in a similar 'graphic/excel-like' look.

有谁知道两者之间的区别？不仅在熊猫方面，而且在总体上。