python - 错误名称 'dtype' 未定义

Question

我尝试编译这段代码，但我得到了这个错误:

NameError: name 'dtype' is not defined

这是python代码:

# -*- coding: utf-8 -*-
from __future__ import division
import pandas as pd
import numpy as np
import re
import missingno as msno
from functools import partial
import seaborn as sns
sns.set(color_codes=True)


if dtype(data.OPP_CREATION_DATE)=="datetime64[ns]":
    print("OPP_CREATION_DATE is of datetime type")
else:
    print("warning: the type of OPP_CREATION_DATE is not datetime, please fix this")

有什么想法可以帮我解决这个问题吗？谢谢

Answer 1

由 Amr Keleg 撰写，

If data is a pandas dataframe then you can check the type of a column as follows:
df['colname'].dtype or df.colname.dtype

在那种情况下你需要例如

df['colname'].dtype ==  np.dtype('datetime64')

或

df.colname.dtype ==  np.dtype('datetime64')