Atlas PH sensor on rasberry pi and using I2C

Community Help With My Project Helped
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I use the code published above dated 3 Feb '18 by “tpangburn”.

phvalue = float(string.split(output, ’ ')[2])
client.virtualWrite(1, phvalue, dataType=‘PH’, dataUnit=‘PH’)

Could you please teach me how to check the data type?
Thank you in advance.