使用'='技巧复制Pandas DataFrame [英] Copy Pandas DataFrame using '=' trick

问题描述

我有两个熊猫DataFrame，sdm.我想创建该DataFrame的副本并进行处理，后来，我想从sdm创建另一个副本并进行其他分析.但是，当我像这样创建新的数据框时，

I have two pandas DataFrames, sdm. I wanted to create a copy of that DataFrame and work on that and later, I want to create another copy from sdm and work on different analysis. However, when I create a new Data Frame like this,

new_df = sdm

它将创建一个副本，但是，当我更改new_df时，它将对我的旧DataFrame sdm进行更改.不使用=怎么办?

It creates a copy, however, when I alter new_df, it makes changes to the my old DataFrame sdm. How can I handle this without using =?

推荐答案

python所做的工作是通过引用传递的.试试这个:

What python does is passing by reference. Try this:

new_df = sdm.copy()

我认为您应该进行更多搜索，我相信对此主题会有很多疑问！

I think you should have search more, I am sure there will be lots of questions on this topic!

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