Pandas和numpy.array相互转换:
- dataframe转化成array
df=df.values
- array转化成dataframe
import pandas as pd
df = pd.DataFrame(df)
判断DataFrame某列中是否含有NAN:
- np.isnan() 只支持float类型
>>> np.isnan(value) # return Ture or False
- value is np.nan支持各种类型
>>> value is np.nan # return Ture or False