Alex Ketay Alex Ketay - 5 months ago 10
MySQL Question

How can I use executemany to instert into mysql a list of dictionaries in python

I'm currently using MySQL and Python to scrape data from the web. Specifically, I am scraping table data and inserting it into my database. My current solution works, but I feel it is extremely inefficient and will most likely lock up my database if I don't rewrite the code. Here is what I currently use (partial code):

itemBank = []
for row in rows:
itemBank.append((tempRow2,tempRow1,tempRow3,tempRow4)) #append data

#itemBank List of dictionaries representing data from each
row of the table. i.e.
('Item_Name':"Tomatoes",'Item_Price':"10",'Item_In_Stock':"10",'Item_Max':"30")

for item in itemBank:
tempDict1 = item[0]
tempDict2 = item[1]
tempDict3 = item[2]
tempDict4 = item[3]

q = """ INSERT IGNORE INTO
TABLE1
(
Item_Name,
Item_Price,
Item_In_Stock,
Item_Max,
Observation_Date
) VALUES (
"{0}",
"{1}",
"{2}",
"{3}",
"{4}"
)
""".format(tempDict1['Item_Name'],tempDict2['Item_Price'],tempDict3['Item_In_Stock'],
tempDict4['Item_Max'],getTimeExtra)

try:
x.execute(q)
conn.commit()
except:
conn.rollback()


Executing each row of the table is cumbersome. I've tried using
executemany
, but I can't seem to figure out how to access the values of the dictionaries correctly.
So, how can I use
executemany
here to insert into the database given the structure of my data?

Answer
itemBank = [] 
for row in rows:
    itemBank.append((
        tempRow2['Item_Name'],
        tempRow1['Item_Price'],
        tempRow3['Item_In_Stock'],
        tempRow4['Item_Max'], 
        getTimeExtra
        )) #append data


q = """ insert ignore into TABLE1 (
        Item_Name, Item_Price, Item_In_Stock, Item_Max, Observation_Date ) 
        values (%s,%s,%s,%s,%s)           
    """

try:
    x.executemany(q, itemBank)
    conn.commit()
except:
    conn.rollback()

Hope it will help you