Using python unable to load CSV file into MySql - mysql

Question

I was trying to load trans_dt into cmdels table. but it throws syntax error. How to add local variable into table. The Local variable name is newDate
import mysql.connector
config = {
'user':'root',
'password':'password',
'host':'127.0.0.1',
'database':'nse'
}
conn= mysql.connector.connect(**config)
c=conn.cursor()
def insertRows(fileName,c):
delimiter=r','
dateString=r'%d-%b-%Y'
file=fileName.split("/")[-1]
if file.startswith("MTO"):
newDate=new_Date(file)
c.execute("Load data local infile %s into table cmdels fields terminated by %s
ignore 4 lines(recno,srno,symbol,series,qtytrd,qtydel,qtyper,trans_dt)
SET trans_dt=(#trans_dt,%s)", (fileName, delimiter,newDate))
localExtractFilePath="/Users/data/nse"
import os
def new_Date(s):
return s[4:-4]
for file in os.listdir(localExtractFilePath):
if file.endswith(".DAT"):
insertRows(localExtractFilePath+"/"+file,c)
print "Loaded file "+file+" into database"
conn.commit()
c.close()
conn.close()

Answer 1

Single quoted string literals can't span newlines. You can use triple-quoted strings ("""Load data...""") but you end up with extra whitespace and newlines in the string, which can cause their own problems. A good option is to end each line with an end quote and let python concatenate them in the compilation step
c.execute("Load data local infile %s into table cmdels fields terminated by %s"
" ignore 4 lines(recno,srno,symbol,series,qtytrd,qtydel,qtyper,trans_dt)"
" SET trans_dt=(#trans_dt,%s)", (fileName, delimiter,newDate))