将 pandas 'timed' dataframe 重组为单行以允许连接

Question

I have dataframes (stored in excel files) of data for a single participant each of which look like

df1 = pd.DataFrame([['15:05', '15:06', '15:07', '15:08'], [7.333879016553067, 8.066897471204006, 7.070168678977272, 6.501888904228463], [64.16712081101915, 65.08486717007806, 67.22483766233766, 64.40328265521458],
[114.21879259980525, 116.49792952572476, 113.26931818181818, 108.35424424108551]]).T

df1.columns  = ['Start', 'CO', 'Dia', 'Sys']

	Start	CO	Dia	Sys
0	15:05	7.33388	64.1671	114.219
1	15:06	8.0669	65.0849	116.498
2	15:07	7.07017	67.2248	113.269
3	15:08	6.50189	64.4033	108.354

and I need to unstack it into 1 row so that I can then read all the different participants into a single dataframe. I have tried using the answer to this question , and the answer to this question to get something like this (a multiindexed dataframe)

Time 1	Time 2

	CO	Dia	Sys	CO	Dia	Sys
0	7.33388	64.1671	114.219	8.0669	65.0849	116.498

But what I'm ending up with is

	('15:05', 'CO')	('15:05', 'Dia')	('15:05', 'Sys')	('15:06', 'CO')	('15:06', 'Dia')	('15:06', 'Sys')
0	7.33388	64.1671	114.219	nan	nan	nan
1	nan	nan	nan	8.0669	65.0849	116.498

So as you can see, each minute is still a new row but now they are arranged in an even less useful way.

Can anyone offer advice?

Answer 1

Assuming that each row is Time 0 , Time 1 , etc. We can use the index for our top level in the MultiIndex

# convert index to string and add "Time "
df1.index = "Time " + df1.index.astype(str)

Then groupby the index, take the max (or some other aggregate that keeps the original values) of all columns besides "Start" (0th element), stack, convert back to a frame, and transpose

out = df1.groupby(df1.index)[df1.columns[1:]].max().stack().to_frame().T