我的数据库包含字段，id，source_server，source_path，destination_path 我试图使用基于id的pymysql从mysql数据库中获取数据： 的 admin.html
<form action = "admin_1.py" method = "POST">
<label for="uname"><b>User UUID::</b></label>
<input type="text" placeholder="Enter Username" name="uuid" required>
<br>
<br >
<br >
<br >
<br >
<button type="submit">click here!!</button>
</form>
Admin.py：
#!C:\Program Files\Python\Python36\python.exe
print ("Content-type: text/html\r\n")
print("")
import cgi,cgitb
import pymysql
form = cgi.FieldStorage()
cgitb.enable()
UUID = form.getvalue('uuid')
db = pymysql.connect(host="localhost", user="root", passwd="", db="fullstack")# name of the data base
cur = db.cursor()
def select_from_sql(uuid):
#(self.cur).execute('''select (id, source_server,source_path,destination_path) values (%s, %s,%s,%s) from posts''', (self.id,self.source_server,self.source_path,self.destination_path) )
sql="SELECT * FROM posts WHERE id=%s"
cur.execute(sql,(uuid))
row=cur.fetchall()
select_from_sql(UUID)
cur.close()
print("<center>")
print('<html>')
print('<form action="approve_mail.py" method="POST">')
print('<input type="submit" value="Approve" name="approve" />')
print('</form>')
print('</html>')
print("</center>")
cur.close()
db.close()
**Approve_admin.py:**
#!C:\Program Files\Python\Python36\python.exe
from admin import UUID
print("Content-type: text/html")
print("")
import cgi,cgitb
def sending():
print (UUID)
sending()
我正在尝试从admin.py导入变量UUID到approve_mail.py：
但是我收到了这个错误; 内容类型：text / html - ＆gt; - ＆GT;
ProgrammingError Python 3.6.0: C:\Program Files\Python\Python36\python.exe
Wed May 2 15:55:10 2018
A problem occurred in a Python script. Here is the sequence of function calls leading up to the error, in the order they occurred.
C:\xampp\htdocs\sample\approve_mail.py in ()
24 import uuid
25 import pymysql
=> 26 from admin_1 import UUID
27 from time import sleep
28 form = cgi.FieldStorage()
admin_1 undefined, UUID undefined
C:\xampp\htdocs\sample\admin_1.py in ()
29 print("<br>")
30 print("</center>")
=> 31 select_from_sql(UUID)
32 cur.close()
33 print("<center>")
select_from_sql = <function select_from_sql>, UUID = None
C:\xampp\htdocs\sample\admin_1.py in select_from_sql(uuid=None)
15 #(self.cur).execute('''select (id, source_server,source_path,destination_path) values (%s, %s,%s,%s) from posts''', (self.id,self.source_server,self.source_path,self.destination_path) )
16 sql="SELECT * FROM posts WHERE id=%s"
=> 17 cur.execute(sql,(uuid))
18 row=cur.fetchall()
19 for i in row:
global cur = <pymysql.cursors.Cursor object>, cur.execute = <bound method Cursor.execute of <pymysql.cursors.Cursor object>>, sql = 'SELECT * FROM posts WHERE id=%s', uuid = None
C:\Program Files\Python\Python36\lib\site-packages\pymysql\cursors.py in execute(self=<pymysql.cursors.Cursor object>, query='SELECT * FROM posts WHERE id=%s', args=None)
163 query = self.mogrify(query, args)
164
=> 165 result = self._query(query)
166 self._executed = query
167 return result
result undefined, self = <pymysql.cursors.Cursor object>, self._query = <bound method Cursor._query of <pymysql.cursors.Cursor object>>, query = 'SELECT * FROM posts WHERE id=%s'
C:\Program Files\Python\Python36\lib\site-packages\pymysql\cursors.py in _query(self=<pymysql.cursors.Cursor object>, q='SELECT * FROM posts WHERE id=%s')
319 conn = self._get_db()
320 self._last_executed = q
=> 321 conn.query(q)
322 self._do_get_result()
323 return self.rowcount
conn = <pymysql.connections.Connection object>, conn.query = <bound method Connection.query of <pymysql.connections.Connection object>>, q = 'SELECT * FROM posts WHERE id=%s'
C:\Program Files\Python\Python36\lib\site-packages\pymysql\connections.py in query(self=<pymysql.connections.Connection object>, sql=b'SELECT * FROM posts WHERE id=%s', unbuffered=False)
858 sql = sql.encode(self.encoding, 'surrogateescape')
859 self._execute_command(COMMAND.COM_QUERY, sql)
=> 860 self._affected_rows = self._read_query_result(unbuffered=unbuffered)
861 return self._affected_rows
862
self = <pymysql.connections.Connection object>, self._affected_rows = 0, self._read_query_result = <bound method Connection._read_query_result of <pymysql.connections.Connection object>>, unbuffered = False
C:\Program Files\Python\Python36\lib\site-packages\pymysql\connections.py in _read_query_result(self=<pymysql.connections.Connection object>, unbuffered=False)
1059 else:
1060 result = MySQLResult(self)
=> 1061 result.read()
1062 self._result = result
1063 if result.server_status is not None:
result = <pymysql.connections.MySQLResult object>, result.read = <bound method MySQLResult.read of <pymysql.connections.MySQLResult object>>
C:\Program Files\Python\Python36\lib\site-packages\pymysql\connections.py in read(self=<pymysql.connections.MySQLResult object>)
1347 def read(self):
1348 try:
=> 1349 first_packet = self.connection._read_packet()
1350
1351 if first_packet.is_ok_packet():
first_packet undefined, self = <pymysql.connections.MySQLResult object>, self.connection = None, self.connection._read_packet undefined
C:\Program Files\Python\Python36\lib\site-packages\pymysql\connections.py in _read_packet(self=<pymysql.connections.Connection object>, packet_type=<class 'pymysql.connections.MysqlPacket'>)
1016
1017 packet = packet_type(buff, self.encoding)
=> 1018 packet.check_error()
1019 return packet
1020
packet = <pymysql.connections.MysqlPacket object>, packet.check_error = <bound method MysqlPacket.check_error of <pymysql.connections.MysqlPacket object>>
C:\Program Files\Python\Python36\lib\site-packages\pymysql\connections.py in check_error(self=<pymysql.connections.MysqlPacket object>)
382 errno = self.read_uint16()
383 if DEBUG: print("errno =", errno)
=> 384 err.raise_mysql_exception(self._data)
385
386 def dump(self):
global err = <module 'pymysql.err' from 'C:\\Program Files\\P...\\Python36\\lib\\site-packages\\pymysql\\err.py'>, err.raise_mysql_exception = <function raise_mysql_exception>, self = <pymysql.connections.MysqlPacket object>, self._data = b"\xff(\x04#42000You have an error in your SQL s... for the right syntax to use near '%s' at line 1"
C:\Program Files\Python\Python36\lib\site-packages\pymysql\err.py in raise_mysql_exception(data=b"\xff(\x04#42000You have an error in your SQL s... for the right syntax to use near '%s' at line 1")
103 errval = data[9:].decode('utf-8', 'replace')
104 else:
105 errval = data[3:].decode('utf-8', 'replace')
106 errorclass = error_map.get(errno, InternalError)
=> 107 raise errorclass(errno, errval)
errorclass = <class 'pymysql.err.ProgrammingError'>, errno = 1064, errval = "You have an error in your SQL syntax; check the ...n for the right syntax to use near '%s' at line 1"
ProgrammingError: (1064, "You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near '%s' at line 1")
args = (1064, "You have an error in your SQL syntax; check the ...n for the right syntax to use near '%s' at line 1")
with_traceback = <built-in method with_traceback of ProgrammingError object>
请帮我理解这个错误：
答案 0 :(得分：0)
这里有两个问题（实际上你的代码有两个以上的问题，但这是另一个问题）：第一个问题是cursor.execute()第二个参数应该是一个列表或元组 - 这里：
cur.execute(sql,(uuid))
你真的想要：
cur.execute(sql,(uuid,))
注意uuid之后的逗号 - 它是定义元组的逗号，而不是parens。
第二个问题是，您将None作为uuid的值传递，参见您的追溯：
select_from_sql = <function select_from_sql>, UUID = None
C:\xampp\htdocs\sample\admin_1.py in select_from_sql(uuid=None)