Can't Insert data into Access Table from Python - Solved

Victor Nijegorodov

Richard MacCutchan wrote:

The float built-in only takes a single parameter, you are passing two, so that code will fail. Also you have specified two values in your insert statement but you are trying to pass only one.

Hmmm... It seems to me there are two values here:

Quote:

cur2.execute('INSERT INTO RawValues (Millitime, PowerCost) VALUES (?,?)',(float(row[0]),row[1]))

The first is

Quote:

float(row[0])

, the second -

Quote:

row[1]

Lost User

Thanks, my eyesight missed that.

Peter R Fletcher

Richard MacCutchan wrote:

Having looked at the documentation, I guess that the extra parentheses round your values may be the problem. The example is:

cursor.execute("insert into products(id, name) values (?, ?)", 'pyodbc', 'awesome library')

So perhaps your code should be:

cur2.execute('INSERT INTO RawValues (Millitime, PowerCost) VALUES (?,?)', float(row[0]), row[1])

No, the 'extra' parentheses turn the two values to be passed into a single (2-element) Python Tuple, which is what the call wants passed. If this were the problem, Python should be throwing an error. I have written a fair bit of other code, adding data to SQLite tables, which is exactly parallel and works as it should.

Lost User

You will have to do some debugging as it is impossible to guess what is happening on your system. Does the execute command return a value, such as the number of rows inserted?

Peter R Fletcher

It returns a cursor. Fetching the contents of that gets the following:

pyodbc.ProgrammingError: No results. Previous SQL was not a query.

That does make a certain amount of sense, given that nothing is happening :), but doesn't really help, particularly since the syntax I am using appears valid and works with Sqlite. I was hoping that someone else had run into and solved this specific problem, since I am out of ideas. [EDIT] Further research suggests that this 'error' is even less helpful, and may well be the normal result when executing something that is not a SELECT query. [/EDIT]

Lost User

Sorry, I am out of ideas, and the documentation is not a lot of help. Although a number of similar questions suggest that it should return a row count.

Lost User

I have been playing with pyodbc and have successfully added records to my pre-built access database. Unfortunately that does not give any clues as to why your code fails. [edit] Created a RawValues table and successfully added a record with 2 values. [/edit]

Peter R Fletcher

Can you post your working Python code, and what version/'bitness' of Access are you running?

Lost User

No need, I just discovered I am blind (and maybe you are). The following calls are missing the parentheses that make them into function calls:

conn2.commit
conn2.close
conn1.close

should be:

conn2.commit()
conn2.close()
conn1.close()

Peter R Fletcher

Of course! Thanks!!

Mycroft Holmes

:laugh: I see it happens to the best of us.

Never underestimate the power of human stupidity - RAH I'm old. I know stuff - JSOP

Lost User

It happens to me embarrassingly too often. :-O