我有两种错误的数据需要修正。一个是无效的,一个是与南。的Python:熊猫会导致无效类型比较
>>> df_new
Volume Price
Date
2017-01-01 500 760
2017-01-02 null 760
2017-01-03 50 770
2017-01-04 null 780
另一种类型是与南
>>> df_new
Volume Price
Date
2017-01-01 500 760
2017-01-02 NaN 760
2017-01-03 50 770
2017-01-04 NaN 780
如何用0代替null和NaN的数据? 我的代码工作,如果null或NaN的,但我不能为两个
volume = df_new['Volume'] == 'null' or df_new['Volume'].isnull()
df_new.loc[volume,'Volume'] = 0
df_new.replace('null',np.NaN,inplace=True)
df_new.iloc[0].fillna(df_new.iloc[1].Open,inplace=True)
工作,它返回错误
Traceback (most recent call last): File "", line 1, in File "/home/.local/lib/python2.7/site-packages/pandas/core/ops.py", line 763, in wrapper res = na_op(values, other) File "/home/.local/lib/python2.7/site-packages/pandas/core/ops.py", line 718, in na_op raise TypeError("invalid type comparison")TypeError: invalid type comparison
代码将工作,如果volume = df_new['Volume'] == 'null'
但这不会更正数据是很NaN和0
对不起,它需要检测大熊猫据帧包含NaN或空第一,那是对的吗?该probllem是在'体积= df_new [ '音量'] == '空' 或df_new [ '体积']。ISNULL()' – lotteryman
这时需要'体积=(df_new [ '音量'] == '空') | (df_new ['Volume']。isnull())' – jezrael
'volume =(df_new ['Volume'] =='null')| (df_new [ '体积'] ISNULL())'仍然返回错误'类型错误:无效类型comparison' – lotteryman