用变量名写入SQLite表（Python）

Question

I'm trying to write five variables to tables in a database using SQLite and Python. Below is my code and the error I'm getting:

CODE:

        cur.execute("CREATE TABLE IF NOT EXISTS " + table_name + " (Date real, Morning_5AM_9AM real, Day_9AM_6PM real, Evening_6PM_10PM real, Night_10PM_5AM real)")   # this works
        export_row= p_transpose.iloc[ii]                 # Note: p_transpose is the transpose of a DataFrame I read in from Excel
        date_object= p_transpose.iloc[ii,0]              # date_object is a string here
        date_object= date_object.replace('_','')
        export_date= int(date_object)                    # to insert into database table as int instead of string 
        export_morning= p_transpose.iloc[ii,1]
        export_day= p_transpose.iloc[ii,2]
        export_eve= p_transpose.iloc[ii,3]
        export_night= p_transpose.iloc[ii,4]
        cur.execute("SELECT name FROM sqlite_master WHERE type='table'")
        available_tables=[item[0] for item in cur.fetchall()]         # assigns a list of all table names in database
        for iii in range (0, row_count): 
            if (re.match('\w*'+df_feeder, available_tables[iii])):
                relevant_table= available_tables[iii]
                cur.execute("INSERT INTO " + relevant_table + "VALUES (?,?,?,?,?)" (export_date, export_morning, export_day, export_eve, export_night))

ERROR on the last line:

TypeError: 'str' object is not callable

I've made sure that none of the export_... variables contain strings, so the string must be relevant_table . However, creating a table using a string variable (see code above again) worked fine so I don't understand why it's giving this error now.

Any input would be greatly appreciated. Let me know if any additional information would be useful.

EDIT :

Here is my traceback, gotten using traceback.format_exc():

'Traceback (most recent call last):\n File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/idlelib/run.py"‌​, line 112, in main\n seq, request = rpc.request_queue.get(block=True, timeout=0.05)\n File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/Queue.py", line 176, in get\n raise Empty\nEmpty\n'

FINAL EDIT, RESOLVED:

For information, thanks to scytale, this now works, using:

cur.execute("INSERT INTO " + relevant_table + " VALUES (?,?,?,?,?)", (export_date, export_morning, export_day, export_eve, export_night))

I thought I had tried changing the punctuation and spacing in all ways possible, but this finally did the trick.

Answer 1

you're missing a comma in your last line after the SQL string - it should be

cur.execute("INSERT INTO " + relevant_table + "VALUES (?,?,?,?,?)",
            (export_date, export_morning, export_day, export_eve, export_night))

Answer 2

Really, for clarity and future maintenance you should be specific as to what and where you are inserting. So your statement should read something like this, for example:

    try:
        result = self.db.execute("insert into Recent (Filename,TimeStamp,Icon) values (?,?,?)",(filename,time_stamp,itype))
    except sqlite3.Error as e:
        wx.MessageBox('Insert Recent file list error'+str(e), 'Error', wx.OK | wx.ICON_INFORMATION)

This makes it clear, not only what the data items are but where you are putting them.
A good reason for declaring what you are inserting explicitly, is that should you add columns to the table at a later date, then the code will still work as expected.

As a side note, has everyone forgotten the power of the print statement when it comes to debugging?
Got a problem? PRINT the damned stuff out and look at it!! 9 times out of ten it's obvious.