Question

我收到以下错误

Traceback (most recent call last):
  File "D:\PYTHON SUPER INP\DB test - Copy1220.py", line 29, in <module>
    if __name__ == "__main__":main()
  File "D:\PYTHON SUPER INP\DB test - Copy1220.py", line 17, in main
    addCust("Zach")
  File "D:\PYTHON SUPER INP\DB test - Copy1220.py", line 13, in addCust
    VALUES(?)""",(name))
ProgrammingError: Incorrect number of bindings supplied. The current 
     statement uses 1, and there are 4 supplied.

使用以下代码

import sqlite3

createDb = sqlite3.connect(":memory:")
queryCurs = createDb.cursor()

def createTable():
    queryCurs.execute(''' CREATE TABLE customers
    (id INTEGER PRIMARY KEY, name TEXT)''')

def addCust(name):
    queryCurs.execute("""INSERT INTO customers (name)
    VALUES(?)""",(name))

def main():
    createTable()
    addCust("Zach")
    createDb.commit()

    queryCurs.execute("SELECT * FROM customers")

    for i in queryCurs:
      print "/n"
      for j in i:
          print j

queryCurs.close

if __name__ == "__main__":main()

Answer 1

下面：

def addCust(name):
    queryCurs.execute("""INSERT INTO customers (name)
    VALUES(?)""",(name))

当您执行(name)时，它与name相同 - 因此如果name为"Zach"，那么它就是一个字符串，那就是＆＃39; s iterable，长度为4，相反，使其成为一个元组或列表，例如：

(name,) # notice the trailing comma

例如：

>>> len(('Zach')) # same as len('Zach')
4
>>> len(('Zach',)) # now a one-tuple containing a string of length 4
1

其他一些注意事项 - 请参阅代码注释：

    for i in queryCurs:
      print "/n" # <-- to print a new line - use `\n` - not `/n`
      for j in i:
          print j

queryCurs.close # this should be queryCurs.close() (eg - call the method)

使用SQlite3编程错误

1 个答案: