Python 按日期选择数据框中的行

对于具有日期时间列（2018-09-09 06:15:00）的给定数据帧，我希望找到与给定日期“2018-01-08”匹配的所有行

我试过这样的方法：

def get_connections(df, mydate):
    connections = df.loc[(df['dates']) == mydate]
    return connections

这是一个解决方案

import pandas as pd

df = pd.DataFrame({"dates":["2018-09-09 06:15:00", "2018-01-08 06:15:00"]})

df[pd.to_datetime(df.dates).dt.strftime("%Y-%m-%d").eq("2018-01-08")]

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这是一个解决方案

import pandas as pd

df = pd.DataFrame({"dates":["2018-09-09 06:15:00", "2018-01-08 06:15:00"]})

df[pd.to_datetime(df.dates).dt.strftime("%Y-%m-%d").eq("2018-01-08")]

---

试试这个

from datetime as datetime as dt
df['dates'] = df['dates'].apply(dt.fromisoformat)

def get_connections(df, mydate):
    connections = df.loc[df['dates'].apply(dt.date) == dt.strptime(mydate, '%Y-%m-%d')]
    return connections
get_connections(datestring)

试试这个

from datetime as datetime as dt
df['dates'] = df['dates'].apply(dt.fromisoformat)

def get_connections(df, mydate):
    connections = df.loc[df['dates'].apply(dt.date) == dt.strptime(mydate, '%Y-%m-%d')]
    return connections
get_connections(datestring)