将表某列时间信息转为datetime格式

import pandas as pd
from dateutil.parser import parse

#测试数据
test_dict = {0: {‘startTime‘: 20190825131028, ‘value‘: 1097},
             1: {‘startTime‘: 20190825132458, ‘value‘: 1083},
             2: {‘startTime‘: 20190825143034, ‘value‘: 1039}}
df = pd.DataFrame(test_dict).T
print(df)

#定义函数后对整列apply
def to_datetime(x):
    time_column = int(x)
    datetime_value = parse(str(time_column))#使用parse将时间字符转为datetime数据格式
    return datetime_value

df[‘startTime‘] = df[‘startTime‘].apply(lambda x:to_datetime(x))

print(df)

[In]
time1 = parse(‘20190825131028‘)
print(time1)
print(time1.day)
print(time1.hour)

[Out]
2019-08-25 13:10:28
25
13