pymysql - TypeError: not all arguments converted during string formatting with sql execute in Python -


the code below 

varlist =[] key, value in json_obj.iteritems():     print key, value     varlist = varlist + ["string"] print varlist   params = ['?' item in varlist] query_string    = 'insert test_table values (%s);' % ','.join(params) print query_string cursor.execute(query_string, varlist)

produces following

['string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string', 'string']   insert test_table values (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?);   traceback (most recent call last):   file "./vpn.py", line 26, in <module>     cursor.execute(query_string, varlist)   file "/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 164, in execute     query = self.mogrify(query, args)   file "/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 143, in mogrify     query = query % self._escape_args(args, conn) typeerror: not arguments converted during string formatting

i have tried 

cursor.execute(query_string, (varlist,))

but doesn't work either.any idea problem is?

from example in documentation:

insert_stmt = (   "insert employees (emp_no, first_name, last_name, hire_date) "   "values (%s, %s, %s, %s)" ) data = (2, 'jane', 'doe', datetime.date(2012, 3, 23)) cursor.execute(insert_stmt, data)

note %s in query line. that's how cursor.execute knows put values. in case query filled , results in error.


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