Python Pandas：将时间戳转换为 datetime.date
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Pandas: Convert Timestamp to datetime.date
提问by kilojoules
I have a pandas column of Timestamp data
我有一个时间戳数据的熊猫列
In [27]: train["Original_Quote_Date"][6]
Out[27]: Timestamp('2013-12-25 00:00:00')
How can check equivalence of these objects to datetime.dateobjects of the type
如何检查这些对象datetime.date与类型对象的等效性
datetime.date(2013, 12, 25)
采纳答案by Andy Hayden
Use the .datemethod:
使用.date方法：
In [11]: t = pd.Timestamp('2013-12-25 00:00:00')
In [12]: t.date()
Out[12]: datetime.date(2013, 12, 25)
In [13]: t.date() == datetime.date(2013, 12, 25)
Out[13]: True
To compare against a DatetimeIndex (i.e. an array of Timestamps), you'll want to do it the other way around:
要与 DatetimeIndex（即时间戳数组）进行比较，您需要以相反的方式进行：
In [21]: pd.Timestamp(datetime.date(2013, 12, 25))
Out[21]: Timestamp('2013-12-25 00:00:00')
In [22]: ts = pd.DatetimeIndex([t])
In [23]: ts == pd.Timestamp(datetime.date(2013, 12, 25))
Out[23]: array([ True], dtype=bool)
回答by albert
You can convert a datetime.date object into a pandas Timestamp like this:
您可以将 datetime.date 对象转换为熊猫时间戳，如下所示：
#!/usr/bin/env python3
# coding: utf-8
import pandas as pd
import datetime
# create a datetime data object
d_time = datetime.date(2010, 11, 12)
# create a pandas Timestamp object
t_stamp = pd.to_datetime('2010/11/12')
# cast `datetime_timestamp` as Timestamp object and compare
d_time2t_stamp = pd.to_datetime(d_time)
# print to double check
print(d_time)
print(t_stamp)
print(d_time2t_stamp)
# since the conversion succeds this prints `True`
print(d_time2t_stamp == t_stamp)
回答by Xavier Ho
As of pandas 0.20.3, use .to_pydatetime()to convert any pandas.DateTimeIndexinstances to Python datetime.datetime.
从 pandas 0.20.3 开始，用于.to_pydatetime()将任何pandas.DateTimeIndex实例转换为 Python datetime.datetime。
