Question

我在切换此数据时遇到问题：

datetime               transmission #
2019-07-12 00:03:06    124
2019-07-12 00:04:56    124
2019-07-12 00:20:10    125
2019-07-12 00:21:33    125

使用python模块pandas转换为如下格式：

transmission #   start                  end
124              2019-07-12 00:03:06    2019-07-12 00:04:56
125              2019-07-12 00:20:10    2019-07-12 00:21:33

起初，我以为我可以使用索引为传输＃且值为datetime的数据透视表来执行此操作，但是我似乎无法使其工作。

print(df.pivot(index = 'ConnectDisconnect', columns=['start', 'end'], values='data_point_time'))

ConnectDisconnect是transmission#。我以为这样可以，但是只能输出

Traceback (most recent call last):
  File "data.py", line 28, in <module>
    print(df.pivot(index = 'ConnectDisconnect', columns=['start', 'end'], values='data_point_time'))
  File "C:\Program Files (x86)\Python37-32\lib\site-packages\pandas\core\generic.py", line 5067, in __getattr__
    return object.__getattribute__(self, name)
AttributeError: 'Series' object has no attribute 'pivot'

如果有人可以帮助我，将不胜感激

Answer 1

df = pd.read_csv('test.csv', sep=r'\s{2,}', engine='python')
n = len(df.index)//2
x = df['datetime']
# drop the column of 'datetime'
df = df.drop('datetime', axis=1)
# Remove the duplicated row
df = df.drop_duplicates()
df.index=range(n) 
start = x[0::2]
start.index=range(n)
end = x[1::2]
end.index = range(n)
df['start'] =start 
df['end']=end 
print(df.to_string(index=False))

输出为

transmission #                start                  end
           124  2019-07-12 00:03:06  2019-07-12 00:04:56
           125  2019-07-12 00:20:10  2019-07-12 00:21:33

将日期时间索引枢轴到开始和结束列

1 个答案: