使用Python获取列的两个值之间的行 [英] Get rows between two values of a column using Python

问题描述

假设存在一个数据帧，如下所示:

Suppose there is a data frame as follows:

df = {
'Period': [1996,'Jan','Feb','March',1997,'Jan','Feb','March',1998,'Jan','Feb','March']
'Some-Values': [,'a','b','c',,'d','e','f',,'g',h','i']
}

以及需要提取值1996和1997之间的行，以便得到的数据帧如下:

and the rows between the values 1996 and 1997 needs to be extracted such that the resulting data frame is as follows:

df_res = {
    'Period': ['Jan','Feb','March']
    'Some-Values': ['a','b','c']
}

我目前正在为此尝试熊猫，但找不到解决方案.

I am currently trying Pandas for this but am unable to find a solution.

推荐答案

尝试将您的数据框更改为正确"方式，然后我们就可以使用年份信息来获取信息

Try to change your dataframe into "correct" way , then we can getting the information by using year information

df['Year']=df.loc[df['Some-Values']=='','Period']
df.Year=df.Year.ffill()
df=df.loc[df.Period!=df.Year,:]
df.loc[df.Year==1996,:]
Out[651]: 
  Period Some-Values  Year
1    Jan           a  1996
2    Feb           b  1996
3  March           c  1996

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