      ExtractQuarter, ExtractSecond, ExtractWeek, ExtractWeekDay, ExtractYear,
      Now, Trunc, TruncDate, TruncDay, TruncHour, TruncMinute, TruncMonth,
      TruncQuarter, TruncSecond, TruncTime, TruncYear,
  )
  from .text import Concat, ConcatPair, Length, Lower, StrIndex, Substr, Upper
  from .window import (
      CumeDist, DenseRank, FirstValue, Lag, LastValue, Lead, NthValue, Ntile,
      PercentRank, Rank, RowNumber,
  )
  
 
</s> remove     'Concat', 'ConcatPair', 'Length', 'Lower', 'StrIndex', 'Substr', 'Upper',
 </s> add     'Concat', 'ConcatPair', 'Length', 'Lower', 'Replace', 'StrIndex', 'Substr',
    'Upper',
from .text import (
    Concat, ConcatPair, Length, Lower, Replace, StrIndex, Substr, Upper,
)
      ExtractQuarter, ExtractSecond, ExtractWeek, ExtractWeekDay, ExtractYear,
      Now, Trunc, TruncDate, TruncDay, TruncHour, TruncMinute, TruncMonth,
      TruncQuarter, TruncSecond, TruncTime, TruncYear,
  )
from .text import (
    Concat, ConcatPair, Length, Lower, Replace, StrIndex, Substr, Upper,
)
  from .window import (
      CumeDist, DenseRank, FirstValue, Lag, LastValue, Lead, NthValue, Ntile,
      PercentRank, Rank, RowNumber,
  )
  
keep keep keep keep replace keep keep keep keep keep
 Refs #28643 -- Added Replace database function. 
django/db/models/functions/__init__.py