如何把python中的DataFrame中的object对象转换成我们需要的unit8类型？
unit8类型怎么弄
其实很简单，只要调用help(df.infer_objects)这个方法里面就可以啦。
或者
In[36]:
df=df.convert_objects(convert_numeric=True)
df.dtypes
Out[36]:
Dateobject
WDint64
Manpowerfloat64
2ndobject
CTRobject
2ndUfloat64
T1int64
T2int64
T3int64
T4float64
dtype:object
unit8类型代码
Forcolumn'2nd'and'CTR'wecancallthevectorised str methodstoreplacethethousandsseparatorandremovethe'%'signandthen astype toconvert:
In[39]:
df['2nd']=df['2nd'].str.replace(',','').astype(int)
df['CTR']=df['CTR'].str.replace('%','').astype(np.float64)
df.dtypes
Out[39]:
Dateobject
WDint64
Manpowerfloat64
2ndint32
CTRfloat64
2ndUfloat64
T1int64
T2int64
T3int64
T4object
dtype:object
In[40]:
df.head()
Out[40]:
DateWDManpower2ndCTR2ndUT1T2T3T4
02013/4/66NaN26455.270.29407533454368
12013/4/77NaN21185.890.31257659583369
22013/4/136NaN24705.380.29354531473383
32013/4/147NaN20336.770.37396748681458
42013/4/206NaN26905.380.29361528541381
Oryoucandothestringhandlingoperationsabovewithoutthecallto astype andthencall convert_objects toconverteverythinginonego.
总之，unit8类型给大家简单的介绍了一些，希望大家多看看。