Convert Pandas column containing NaNs to dtype ‘int’

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I read data from a .csv file to a Pandas dataframe as below. For one of the columns, namely id, I want to specify the column type as int. The problem is the id series has missing/empty values.

When I try to cast the id column to integer while reading the .csv, I get:

df= pd.read_csv("data.csv", dtype={"id": int}) 
error: Integer column has NA values

Alternatively, I tried to convert the column type after reading as below, but this time I get:

df= pd.read_csv("data.csv") 
df[["id"]] = df[["id"]].astype(int)
error: Cannot convert NA to integer

How can I tackle this?

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