[Python] Keep rows of dataframe based on column, where the column has a whole / round number...

I have a dataframe with a float column (number), e.g.:

value number
1 0.98
10 1.00
-1 1.23
-10 2.00


and i only want to keep the rows of the dataframe, where the number column is a "full" number (1,2,3,...) , how can i do that? The expected output is:

value number
10 1.00
-10 2.00


this question only provides the solution how to delete all rows which a whole number How do I filter rows in a dataframe that have whole numbers in one column

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