熊貓Xlsxwriter時間格式

Question

我想用xlsxwriter寫出我的熊貓表。我有兩列：

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

但是當我使用xlsxwriter，輸出爲：

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

我嘗試使用DATETIME_FORMAT = 'HH：MM：SS'，但這並沒有改變它。如何在不影響日期欄的情況下正確格式化日期？

Answer 1

以下代碼適用於我，但有一些注意事項。如果自定義格式化工作取決於您打開的Windows/Excel版本。優先自定義格式取決於Windows操作系統的語言設置。

Excel custom formatting

Windows date/time settings

所以，是的，沒有最好的解決方案......但這個想法是改變每個列的格式，而不是改變如何解釋數據類型的整個的excel文件正在創建。

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()