Write Null values as 0.0 (float) type in csv

[mg24]

Hi Team,

with the below code I am extracting sql table data into CSV File with delimiter '|'

in SQL Table,in some fields ['Market Price',"Spread"] it has null Records. So for these values I want to
write values 0.0 as float(data type).

writer.writerows(row)

qry = "select * from Trading_data" 
cursor.execute(qry) 
data = cursor.fetchall() 
 
With open("E:\\backup\\output.csv","w","newline="") as outfile
    writer = csv.writer(outfile,quoting = csv.QUOTE_NONNUMERIC)
    writer.writerows(col[0] for col in cursor.description)
    While True:
        rows = cursor.fetchmany(10000)
        if len(rows) ==0:
            print("no records found")
            break
        else:
             for row in rows:
             	writer.writerows(row)

[ndc85430]

So, change the nulls into 0s before writing.

[mg24]

hi very nice,

how to do it here,

its complete row, but I want it to apply it in columns.
check value in two columns, and run the code

for row in rows:
writer.writerows(row)

[deanhystad]

Use pandas instead of csv. When reading the csv into a DataFrame you can use DataFrame.fillna() to replace NaN with some value.

I don't understand why you are using csv files at all. From all your posts it sounds like you are getting information from a database and writing it to a CSV file only to read the CSV file and store the information in a database. Why?