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  * [ __ ](../../../index.html)
  * [ Python API reference ](../../index.html)
  * __
  * [ Manipulation/selection ](../modify_select.html)
  * polars.LazyF... 

#  polars.LazyFrame.fill_null  #

LazyFrame.  fill_null  (

     _ value  :  Any  |  [ None  ](https://docs.python.org/3/library/constants.html#None "\(in Python v3.12\)") =  None  _ , 
     _ strategy  :  FillNullStrategy  |  [ None  ](https://docs.python.org/3/library/constants.html#None "\(in Python v3.12\)") =  None  _ , 
     _ limit  :  [ int  ](https://docs.python.org/3/library/functions.html#int "\(in Python v3.12\)") |  [ None  ](https://docs.python.org/3/library/constants.html#None "\(in Python v3.12\)") =  None  _ , 
     _ *  _ , 
     _ matches_supertype  :  [ bool  ](https://docs.python.org/3/library/functions.html#bool "\(in Python v3.12\)") =  True  _ , 
)  →  Self  [ [source]  ](https://github.com/pola-rs/polars/blob/main/py-
polars/polars/lazyframe/frame.py#L4900-L5026) #

    

Fill null values using the specified value or strategy.

Parameters  :

    

**value**

    

Value used to fill null values.

**strategy** {None, ‘forward’, ‘backward’, ‘min’, ‘max’, ‘mean’, ‘zero’,
‘one’}

    

Strategy used to fill null values.

**limit**

    

Number of consecutive null values to fill when using the ‘forward’ or
‘backward’ strategy.

**matches_supertype**

    

Fill all