Pandas database usage records

a data.dropna

Read csv file data=pd.read_csv("")

1. Delete rows or columns with all null values

data=data.dropna(axis=0, how='all')   #行

data=data.dropna(axis=1, how='all')   #列

2. Delete rows or columns with null values

data=data.dropna(axis=0, how='any')   #行

data=data.dropna(axis=1, how='any')   #列

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