我正在尝试在2016年的一本书中找到的以下代码：
function getCartItems($conn)
{
$cust_id=$_SESSION['cust_id'];
$stmtSelect1 = $conn->prepare("SELECT product_id FROM tbl_cart WHERE cust_id=:cust_id");
$stmtSelect1->bindParam('cust_id',$cust_id);
$stmtSelect1->execute();
$product_id= $stmtSelect1->fetchAll();
$stmtSelect = $conn->prepare("SELECT * FROM tbl_item WHERE product_id=:product_id");
$stmtSelect->bindParam('product_id',$product_id);
$stmtSelect->execute();
return $adminUsers = $stmtSelect->fetchAll();
}
这只是给我以下错误：
import MySQLdb
import pandas as pd
# database setup omitted for the sake of brevity
nr_customers = 100
colnames = ["movie%i" %i for i in range(1, 33)]
pd.np.random.seed(2015)
generated_customers = pd.np.random.randint(0,2,32 * nr_customers).reshape(nr_customers,32)
data = pd.DataFrame(generated_customers, columns = list(colnames))
data.to_sql('cust',mc,index=True,if_exists='replace',index_label='cust_id')
我可以在中恢复”“ DatabaseError：在SQL'SELECT name from sqlite_master WHERE type ='table'AND name = ?;'中执行失败：
我尝试了不同的方法，例如使用f“ $ {}”等，但是错误是相同的。
代码与本书中的代码并不完全相同，因为我不得不删除---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/MySQLdb/cursors.py in execute(self, query, args)
242 try:
--> 243 query = query % args
244 except TypeError as m:
TypeError: not all arguments converted during string formatting
During handling of the above exception, another exception occurred:
ProgrammingError Traceback (most recent call last)
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in execute(self, *args, **kwargs)
1430 else:
-> 1431 cur.execute(*args)
1432 return cur
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/MySQLdb/cursors.py in execute(self, query, args)
244 except TypeError as m:
--> 245 self.errorhandler(self, ProgrammingError, str(m))
246
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/MySQLdb/connections.py in defaulterrorhandler(***failed resolving arguments***)
51 if errorclass is not None:
---> 52 raise errorclass(errorvalue)
53 else:
ProgrammingError: not all arguments converted during string formatting
During handling of the above exception, another exception occurred:
DatabaseError Traceback (most recent call last)
<ipython-input-24-125bb185f2f4> in <module>
4 generated_customers = pd.np.random.randint(0,2,32 * nr_customers).reshape(nr_customers,32)
5 data = pd.DataFrame(generated_customers, columns = list(colnames))
----> 6 data.to_sql('cust',mc,index=True,if_exists='replace',index_label='cust_id')
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/core/generic.py in to_sql(self, name, con, schema, if_exists, index, index_label, chunksize, dtype, method)
2529 sql.to_sql(self, name, con, schema=schema, if_exists=if_exists,
2530 index=index, index_label=index_label, chunksize=chunksize,
-> 2531 dtype=dtype, method=method)
2532
2533 def to_pickle(self, path, compression='infer',
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in to_sql(frame, name, con, schema, if_exists, index, index_label, chunksize, dtype, method)
458 pandas_sql.to_sql(frame, name, if_exists=if_exists, index=index,
459 index_label=index_label, schema=schema,
--> 460 chunksize=chunksize, dtype=dtype, method=method)
461
462
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in to_sql(self, frame, name, if_exists, index, index_label, schema, chunksize, dtype, method)
1544 if_exists=if_exists, index_label=index_label,
1545 dtype=dtype)
-> 1546 table.create()
1547 table.insert(chunksize, method)
1548
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in create(self)
570
571 def create(self):
--> 572 if self.exists():
573 if self.if_exists == 'fail':
574 raise ValueError(
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in exists(self)
558
559 def exists(self):
--> 560 return self.pd_sql.has_table(self.name, self.schema)
561
562 def sql_schema(self):
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in has_table(self, name, schema)
1556 "WHERE type='table' AND name={wld};").format(wld=wld)
1557
-> 1558 return len(self.execute(query, [name, ]).fetchall()) > 0
1559
1560 def get_table(self, table_name, schema=None):
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in execute(self, *args, **kwargs)
1443 "Execution failed on sql '{sql}': {exc}".format(
1444 sql=args[0], exc=exc))
-> 1445 raise_with_traceback(ex)
1446
1447 @staticmethod
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/compat/__init__.py in raise_with_traceback(exc, traceback)
418 if traceback == Ellipsis:
419 _, _, traceback = sys.exc_info()
--> 420 raise exc.with_traceback(traceback)
421 else:
422 # this version of raise is a syntax error in Python 3
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/pandas/io/sql.py in execute(self, *args, **kwargs)
1429 cur.execute(*args, **kwargs)
1430 else:
-> 1431 cur.execute(*args)
1432 return cur
1433 except Exception as exc:
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/MySQLdb/cursors.py in execute(self, query, args)
243 query = query % args
244 except TypeError as m:
--> 245 self.errorhandler(self, ProgrammingError, str(m))
246
247 if isinstance(query, unicode):
~/anaconda3/envs/TestEnv/lib/python3.7/site-packages/MySQLdb/connections.py in defaulterrorhandler(***failed resolving arguments***)
50 raise errorvalue
51 if errorclass is not None:
---> 52 raise errorclass(errorvalue)
53 else:
54 raise Exception(errorvalue)
DatabaseError: Execution failed on sql 'SELECT name FROM sqlite_master WHERE type='table' AND name=?;': not all arguments converted during string formatting
中使用的flavor = 'mysql'参数。
我正在使用：
答案 0 :(得分：1)
没关系。刚刚更改为将sqlalchemy与pymysql一起使用，并节省了大量时间和LOC：
from sqlalchemy import create_engine
engine = create_engine('mysql+pymysql://user:password@localhost/database')
...
data.to_sql(table, con = engine)