Python : How to insert a dictionary to a sqlite database?

13
votes

I have a sqlite database with a table with following columns :

id(int) , name(text) , dob(text)

I want to insert following dictionary to it :

{"id":"100","name":"xyz","dob":"12/12/12"}

Dictionary keys are the column names. How can i achieve it ?

5
pythonsqlitedictionary
What have you tried? How are you connecting to the database? Are you using any kind of ORM? - pcalcao
Can you please provide some code you have Tried ?? - shobhit
you cannot insert a dictionary easily, but you can insert a list. Have a look at the docs - DJJ
A possible solution would be to modify the Class IterChars() in the docs . I was not able to adapt it though. A look at sqlalchemy might help as well - DJJ
Does this answer your question? Insert Values from dictionary into sqlite database - wesinat0r

5 Answers

9
votes

Looking at the documentation here you can add a single row:

c.execute("INSERT INTO stocks VALUES (?,?,?)", [dict["id"], dict["name"], dict["dob"]])

Or you can use a list and add multiple rows in one go:

# Larger example that inserts many records at a time
purchases = [('2006-03-28', 'BUY', 'IBM', 1000, 45.00),
             ('2006-04-05', 'BUY', 'MSFT', 1000, 72.00),
             ('2006-04-06', 'SELL', 'IBM', 500, 53.00),
            ]
c.executemany('INSERT INTO stocks VALUES (?,?,?,?,?)', purchases)
8
votes

Here's a way which preserves parameter safety. (Might need polishing in the tablename department)

def post_row(conn, tablename, rec):
    keys = ','.join(rec.keys())
    question_marks = ','.join(list('?'*len(rec)))
    values = tuple(rec.values())
    conn.execute('INSERT INTO '+tablename+' ('+keys+') VALUES ('+question_marks+')', values)

row = {"id":"100","name":"xyz","dob":"12/12/12"}
post_row(my_db, 'my_table', row)
6
votes

If, for example, c = conn.cursor(), and your dictionary is named dict and your table tablename, then you can write

c.execute('insert into tablename values (?,?,?)', [dict['id'], dict['name'], dict['dob']])

Which will insert the elements of the dictionary into the table as you require.

6
votes

To use dictionaries directly you can do:

user1 = {"id":100, "name": "Rumpelstiltskin", "dob": "12/12/12"}
c.execute("INSERT INTO users VALUES (:id, :name, :dob)", user1)

Using along with instances/models:

class User:                                                                      

    def __init__(self, name, dob):                                            
        self.name = name                                                             
        self.dob = dao  

u1 = User("Rumpelstiltskin", "12/12/12")
c.execute("INSERT INTO users VALUES (:name, :dob)", u1.__dict__)

id is a keyword in Python, so if you want to use it as an identifier of an instance variable I would recommend using _id (and the same as your table's primary key name).

1
votes

As per Gareth‘s response, if you're using MySQLdb you can use executemany and pass a list of values which you can get directly from your dict using dict.values()