dtype error on file merge

Question

I need to join several csv files, where the columns are float. I made a small code, but the output of the columns are in str, so I tried to add the output format of the data, but the following error is coming out:

TypeError: 'dtype' is an invalid keyword argument for this function

Where is the error? Follow the code:

# Abre o arquivo redacao.txt para escrita:
with open("/home/mayna/Downloads/Leo/uniao.csv", "w", dtype=float) as file:

# Percorre a lista de arquivos a serem lidos:
    for temp in ["/home/mayna/Downloads/Leo/B116353_2018_FILTRADO.csv", "/home/mayna/Downloads/Leo/B116354_2018_FILTRADO.csv"]:

        # Abre cada arquivo para leitura:
        with open(temp, "r") as t:

            # Escreve no arquivo o conteúdo:
            file.writelines(t)

Thank you!

Answer 1

The function open() does not have the parameter dtype, as the message is indicating. (Source: https://docs.python.org/3.6/library/functions.html?highlight=open#open)

You can read the data as the same string, and perform the conversion only when using the value, using function float().