如何将每 2 行合并为 1 行

Question

我正在尝试修复这个 NBA 比赛细节 table。 table中每两行是相同的游戏(GAME_ID)。我想让两行在一行，这样主队和客队的数据就会在同一行。

Answer 1

您可以使用 set_index 并展开，然后展平 headers。

这是我为棒球游戏编写的一些代码，我必须创建自己的游戏编号：

# source datafrome
year = '2020'
df = pd.read_excel('https://www.sportsbookreviewsonline.com/scoresoddsarchives/mlb/mlb%20odds%202011.xlsx')
df = df.dropna(how="all").copy()

df["Date"] = df["Date"].astype(int)  # To handle excel float type in some years
df["Date"] = pd.to_datetime(
    f"{year}" + df["Date"].astype(str).str.rjust(4, "0"), format="%Y%m%d"
)

cols = ["Date", "VH", "Team", "Final", "Close"]
df = df[cols]

df = df[df["VH"].isin(["V", "H"])]

# Flatten teams lines in to games
df["Game No"] = (df["VH"] == "V").cumsum()
df = df.set_index(["Game No", "Date", "VH"]).unstack()
df.columns = df.columns.map("_".join)

df = df.reset_index()

输出：

      Game No       Date Team_H Team_V  Final_H  Final_V  Close_H  Close_V
0           1 2020-03-31    WAS    ATL        0        2      119     -139
1           2 2020-03-31    CIN    MIL        7        6     -110     -110
2           3 2020-03-31    STL    SDG        3        5     -178      158
3           4 2020-03-31    LOS    SFO        2        1     -114     -106
4           5 2020-03-31    NYY    DET        6        3     -152      132
...       ...        ...    ...    ...      ...      ...      ...      ...
2462     2463 2020-10-22    TEX    STL        7       16     -183      163
2463     2464 2020-10-23    TEX    STL        4        0     -171      151
2464     2465 2020-10-24    TEX    STL        4        2     -130      110
2465     2466 2020-10-27    STL    TEX       10        9     -114     -106
2466     2467 2020-10-28    STL    TEX        6        2     -130      110

[2467 rows x 8 columns]

如何将每 2 行合并为 1 行

How to combine every 2 rows into 1 row

python

numpy

pandas

data-cleaning

nba-api