回傳 a DataFrameNaFunctions 以處理遺失值。
退貨
DataFrameNaFunctions
Examples
df = spark.sql("SELECT 1 AS c1, int(NULL) AS c2")
type(df.na)
# <class '...dataframe.DataFrameNaFunctions'>
將缺失值替換為 2。
df.na.fill(2).show()
# +---+---+
# | c1| c2|
# +---+---+
# | 1| 2|
# +---+---+