pandas :设置编号.最大行数

问题描述

我在查看以下 DataFrame 时遇到问题:

I have a problem viewing the following DataFrame:

n = 100
foo = DataFrame(index=range(n))
foo['floats'] = np.random.randn(n)
foo

问题是它不会在 ipython 笔记本中默认打印所有行，但我必须切片才能查看结果行.即使是以下选项也不会改变输出:

The problem is that it does not print all rows per default in ipython notebook, but I have to slice to view the resulting rows. Even the following option does not change the output:

pd.set_option('display.max_rows', 500)

有人知道如何显示整个数组吗?

Does anyone know how to display the whole array?

推荐答案

设置display.max_rows:

pd.set_option('display.max_rows', 500)

对于旧版本的 pandas (<=0.11.0)，您需要同时更改 display.height 和 display.max_rows.

For older versions of pandas (<=0.11.0) you need to change both display.height and display.max_rows.

pd.set_option('display.height', 500)
pd.set_option('display.max_rows', 500)

另见 pd.describe_option('display').

您可以像这样暂时为此一次设置一个选项:

You can set an option only temporarily for this one time like this:

from IPython.display import display
with pd.option_context('display.max_rows', 100, 'display.max_columns', 10):
    display(df) #need display to show the dataframe when using with in jupyter
    #some pandas stuff

您还可以像这样将选项重置为其默认值:

You can also reset an option back to its default value like this:

pd.reset_option('display.max_rows')

然后将它们全部重置:

pd.reset_option('all')

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