问题描述
pandas库中有很多选项可以更改对象的位置，例如以下语句...
In the pandas library many times there is an option to change the object inplace such as with the following statement...
df.dropna(axis='index', how='all', inplace=True)
我很好奇，传递inplace=True与传递inplace=False时返回什么以及如何处理该对象.
I am curious what is being returned as well as how the object is handled when inplace=True is passed vs. when inplace=False.
在inplace=True时是否所有操作都在修改self?而当inplace=False是立即创建的新对象(例如new_df = self)然后返回new_df时?
Are all operations modifying self when inplace=True? And when inplace=False is a new object created immediately such as new_df = self and then new_df is returned?
推荐答案
通过inplace=True时，数据将被重命名(不返回任何内容)，因此您将使用:
When inplace=True is passed, the data is renamed in place (it returns nothing), so you'd use:
df.an_operation(inplace=True)
传递inplace=False时(这是默认值，因此不是必需的)，执行操作并返回对象的副本，因此您将使用:
When inplace=False is passed (this is the default value, so isn't necessary), performs the operation and returns a copy of the object, so you'd use:
df = df.an_operation(inplace=False)
这篇关于了解inplace = True的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！