pandas 如何获得今天与熊猫的约会？
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How to get today's date with pandas?
提问by ParalysisByAnalysis
I have a python script that imports a df, processes it, and then outputs to a csv file. I'm using pandas.write_csv()to output the file.
我有一个 python 脚本，它导入一个 df，处理它，然后输出到一个 csv 文件。我pandas.write_csv()用来输出文件。
I'm looking to standardize the manner in which my script names the output file. Specifically, I would like for the script to pull today's date as format: MMDDYYYY and insert that to the end of the CSV file.
我希望标准化我的脚本命名输出文件的方式。具体来说，我希望脚本将今天的日期提取为格式：MMDDYYYY 并将其插入到 CSV 文件的末尾。
outputfile = 'mypotentialfilename_MMDDYYYY.csv'
pd.write_csv(outputfile)
In the past, I've seen quick ways to insert a date into a text, but I cannot seem to find the code to review. Any help is appreciated.
过去，我见过在文本中插入日期的快速方法，但我似乎找不到要查看的代码。任何帮助表示赞赏。
回答by piRSquared
python's formatcan handle date input
python的format可以处理日期输入
today = pd.Timestamp('today')
'filename_{:%m%d%Y}.csv'.format(today)
'filename_10042017.csv'
Using Python 3.6's f-strings
使用 Python 3.6 f-strings
today = pd.Timestamp('today')
f'filename_{today:%m%d%Y}.csv'
'filename_10042017.csv'
回答by cs95
You need dt.today+ dt.strftime:
你需要dt.today+ dt.strftime：
import datetime as dt
today = dt.datetime.today().strftime('%m%d%Y')
output_file = 'filename_{}.csv'.format(today)
Also, pd.write_csvis deprecated/removed in newer versions. I suggest upgrading your pandas to the latest version (v0.20 as of now), and using df.to_csv.
此外，pd.write_csv在较新版本中已弃用/删除。我建议将您的 Pandas 升级到最新版本（截至目前为 v0.20），并使用df.to_csv.
