熊猫Xlsxwriter时间格式

Question

我想用xlsxwriter写出我的熊猫表。我有两列：

Date  | Time 
10/10/2015 8:57 
11/10/2015 10:23 

但是当我使用xlsxwriter，输出为：

Date  | Time 
10/10/2015 0.63575435 
11/10/2015 0.33256774 

我尝试使用DATETIME_FORMAT = 'HH：MM：SS'，但这并没有改变它。如何在不影响日期栏的情况下正确格式化日期？

Answer 1

以下代码适用于我，但有一些注意事项。如果自定义格式化工作取决于您打开的Windows/Excel版本。优先自定义格式取决于Windows操作系统的语言设置。

Excel custom formatting

Windows date/time settings

所以，是的，没有最好的解决方案......但这个想法是改变每个列的格式，而不是改变如何解释数据类型的整个的excel文件正在创建。

import pandas as pd 
from datetime import datetime, date 

# Create a Pandas dataframe from some datetime data. 
df = pd.DataFrame({'Date and time': [date(2015, 1, 1), 
            date(2015, 1, 2), 
            date(2015, 1, 3), 
            date(2015, 1, 4), 
            date(2015, 1, 5)], 
        'Time only':  ["11:30:55", 
            "1:20:33", 
            "11:10:00", 
            "16:45:35", 
            "12:10:15"], 
        }) 


df['Time only'] = df['Time only'].apply(pd.to_timedelta) 
#df['Date and time'] = df['Date and time'].apply(pd.to_datetime) 


# Create a Pandas Excel writer using XlsxWriter as the engine. 
# Also set the default datetime and date formats. 
writer = pd.ExcelWriter("pandas_datetime.xlsx", 
         engine='xlsxwriter') 

# Convert the dataframe to an XlsxWriter Excel object. 
df.to_excel(writer, sheet_name='Sheet1') 

# Get the xlsxwriter workbook and worksheet objects in order to set the column 
# widths, to make the dates clearer. 
workbook = writer.book 
worksheet = writer.sheets['Sheet1'] 

#PLAY AROUND WITH THE NUM_FORMAT, IT DEPENDS ON YOUR WINDOWS AND EXCEL DATE/TIME SETTINGS WHAT WILL WORK 
# Add some cell formats. 
format1 = workbook.add_format({'num_format': 'd-mmm-yy'}) 
format2 = workbook.add_format({'num_format': "h:mm:ss"}) 

# Set the format 

worksheet.set_column('B:B', None, format1) 

worksheet.set_column('C:C', None, format2) 

worksheet.set_column('B:C', 20) 

# Close the Pandas Excel writer and output the Excel file. 
writer.save()