Question

我为动态更新表做了编码。它给了我输出，但我只能插入整数而不是字符串它给我“操作错误”如果我输入字符串，我尝试改变表字段数据类型，但它仍然只接受整数，我认为它需要在程序内进行更改。请帮忙：

这是我的代码：

import MySQLdb
class data:
    def __init__(self):

        self.file123 = raw_input("Enter film: ")
        self.title_ = raw_input("Enter title: ")
        self.year = raw_input("Enter year: ")
        self.director = raw_input("Enter director: ")

a=data()

db = MySQLdb.connect(host="localhost", # your host, usually localhost
                     user="root", # your username
                      passwd="mysql", # your password
                      db="sakila") # name of the data base

cursor = db.cursor()

query = "INSERT INTO films (file123, title_, year, director) VALUES (%s, %s, %s, %s)" % (a.file123, a.title_, a.year, a.director)

cursor.execute(query)
db.commit()
db.close()

我应该更改什么才能接受整数和字符串作为输入？请帮助

错误：

Enter film: 123
Enter title: adarsh
Enter year: 1234
Enter director: 132

**error**
    Traceback (most recent call last):
      File "C:\Python27\maybe1.py", line 22, in <module>
        cursor.execute(query)
      File "C:\Python27\lib\site-packages\MySQLdb\cursors.py", line 202, in execute
        self.errorhandler(self, exc, value)
      File "C:\Python27\lib\site-packages\MySQLdb\connections.py", line 36, in defaulterrorhandler
        raise errorclass, errorvalue
    OperationalError: (1054, "Unknown column 'adarsh' in 'field list'")

数据类型： file123 int（11），title_ varchar（50），year int（11），director varchar（12）

Answer 1

我认为您需要为字符串添加'%s'，为整数添加%s

query = "INSERT INTO films (file123, title_, year, director) VALUES ('%s', '%s', %s, '%s')" % (a.file123, a.title_, a.year, a.director)

或

query = "INSERT INTO films (file123, title_, year, director) VALUES (?,?,?,?)"

curs.excute(query,[a.file123, a.title_, a.year, a.director])

解释您的代码有什么问题：

    self.file123 = raw_input("Enter film: ")
    self.title_ = raw_input("Enter title: ")
    self.year = raw_input("Enter year: ")
    self.director = raw_input("Enter director: ")

raw_input("Enter film: ")始终为string。所以你需要将每个变量转换为适当的类型，例如：file123 to int; year to int

现在

query = "INSERT INTO films (file123, title_, year, director) VALUES (%s, %s, %s, %s)" % (a.file123, a.title_, a.year, a.director)
print query

它给出了

INSERT INTO films (file123, title_, year, director) VALUES (123, adars, 200, sundar)

但正确的格式应为

INSERT INTO films (file123, title_, year, director) VALUES (123, 'adars', 200, 'sundar')

由于%s直接将值设为字符串而没有引号，因此而不是%s使用?

Answer 2

我认为这更好：

cursor.execute("INSERT INTO films (file123, title_, year, director) "
               "VALUES (%s, %s, %s, %s)", 
               (a.file123, a.title_, a.year, a.director))

让MySQLdb为您做变量格式化工作，您不需要自己添加引号，而且更安全。

Here就是例子。

python无法在表中插入字符串

2 个答案: