Question

我有以下代码，用于导入员工的时钟记录行，并计算出员工在建筑物中的30分钟间隔。然后，我想将此（“ sample_employee_clockin_dates”）分配回原始数据帧，但出现错误：

ValueError：值的长度与索引的长度不匹配

import pandas as pd


    sample_employee_clockin = pd.DataFrame({'direction_in': {15831: Timestamp('2019-06-25 04:37:59')}, 'emp': {15831: 73.0}, 'direction_out': {15831: Timestamp('2019-06-25 15:17:35')}, 'time_difference': {15831: '0 days 10:39:36'}, 'complete_record': {15831: 'yes'}, 'terminal': {15831: 1.0}, 'job_title': {15831: 44.0}, 'division': {15831: 1.0}})

    for label, row in sample_employee_clockin.iterrows():
        date_in = row["direction_in"]
        date_out = row["direction_out"]
        sample_employee_clockin_dates = pd.date_range(start=date_in.floor(freq="30min"),end=date_out.ceil(freq="30min"),freq='30min')

    sample_employee_clockin["clock_in_times"] = sample_employee_clockin_dates

完整错误是：

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-81-59a967c4631c> in <module>
      8     sample_employee_clockin_date = pd.date_range(start=date_in.floor(freq="30min"),end=date_out.ceil(freq="30min"),freq='30min')
      9 
---> 10 sample_employee_clockin["clock_in_times"] = sample_employee_clockin_date

c:\program files (x86)\python37-32\lib\site-packages\pandas\core\frame.py in
setitem （（自身，键，值）其他3117： 3118＃设置列 -> 3119 self._set_item（键，值） 3120 3121 def _setitem_slice（自身，键，值）：
c:\program files (x86)\python37-32\lib\site-packages\pandas\core\frame.py in
set_item（自身，键，值） 3192 3193 self._ensure_valid_index（值） -> 3194值= self._sanitize_column（键，值） 3195 NDFrame._set_item（自身，键，值） 3196
c:\program files (x86)\python37-32\lib\site-packages\pandas\core\frame.py in
_sanitize_column（自身，键，值，广播） 3389 3390＃把我变成一个ndarray -> 3391值= _sanitize_index（值，self.index，copy = False） 3392如果不是isinstance（值，（np.ndarray，索引））： 3393如果isinstance（value，list）and len（value）> 0：
c:\program files (x86)\python37-32\lib\site-packages\pandas\core\series.py in
_sanitize_index（数据，索引，副本） 3999 4000如果len（data）！= len（index）： -> 4001提高ValueError（'值的长度与''index'的长度不匹配） 4002 4003如果isinstance（data，ABCIndexClass）并且不复制：
ValueError: Length of values does not match length of index

Answer 1

因为不可能在此处添加多行代码注释代码：

import pandas as pd


sample_employee_clockin = pd.DataFrame({'direction_in': {15831: pd.Timestamp('2019-06-25 04:37:59')}, 'emp': {15831: 73.0}, 'direction_out': {15831: pd.Timestamp('2019-06-25 15:17:35')}, 'time_difference': {15831: '0 days 10:39:36'}, 'complete_record': {15831: 'yes'}, 'terminal': {15831: 1.0}, 'job_title': {15831: 44.0}, 'division': {15831: 1.0}})

for label, row in sample_employee_clockin.iterrows():
    date_in = row["direction_in"]
    date_out = row["direction_out"]
    sample_employee_clockin_dates = pd.date_range(start=date_in.floor(freq="30min"),end=date_out.ceil(freq="30min"),freq='30min')

sample_employee_clockin["clock_in_times"] = pd.Series
sample_employee_clockin.at[15831,'clock_in_times'] = sample_employee_clockin_dates.to_list()

熊猫：将多个日期添加到单个列

1 个答案: