python类型转换astype转化为list类型_python dataframe astype 字段类型转换方法

使用astype实现dataframe字段类型转换

# -*- coding: UTF-8 -*-

import pandas as pd

df = pd.DataFrame([{'col1':'a', 'col2':'1'}, {'col1':'b', 'col2':'2'}])

print df.dtypes

df['col2'] = df['col2'].astype('int')

print '-----------'

print df.dtypes

df['col2'] = df['col2'].astype('float64')

print '-----------'

print df.dtypes

输出结果：

col1 object

col2 object

dtype: object

-----------

col1 object

col2 int32

dtype: object

-----------

col1 object

col2 float64

dtype: object

注：data type list

Data type Description

bool_ Boolean (True or False) stored as a byte

int_ Default integer type (same as C long; normally either int64 or int32)

intc Identic