首页猿问详细代码如下，请问我该如何把变量的...

详细代码如下，请问我该如何把变量的值传递给execute的sql中？

Python

紫衣仙女 2022-10-27 10:06:23

###_*_coding:gb2312_*_from Tkinter import *import sysimport DB2class ONE(object):def __init__(self):self.top=Tk()self.top.title('test')self.IDVar1=StringVar()self.IDVar2=StringVar()frame=Frame(self.top)IDLabel1=Label(frame,text="code:",underline=0)IDLabel2=Label(frame,text="Userid:",underline=0)IDEntry1=Entry(frame,textvariable=self.IDVar1,width=25)IDEntry2=Entry(frame,textvariable=self.IDVar2,width=25)def check():dsn="driver={IBM DB2 ODBC DRIVER};database=%s;hostname=%s;port=%s;protocol=tcpip;"%("dbname","192.168.1.1","65535")conn = DB2.connect(dsn,"user","password")curs = conn.cursor() #到此为止都很顺利curs.execute("select * from tables where userid=%s and code=%s")%(IDEntry2.get(),%IDEntry1.get()) #Entry获取的值无法当成变量传递给execute的sql语句中。#curs.execute("select * from tables where userid=‘aaa’ and code=‘123’") //直接写死就可以ows = curs.fetchall()print owscurs.close()conn.close()Button1=Button(frame,text="check",command=check)IDLabel1.grid(row=0,column=0,sticky=W,pady=3,padx=15)IDEntry1.grid(row=0,column=1,sticky=EW,pady=3,padx=15)Button1.grid(row=2,column=1,sticky=EW,pady=3,padx=3)frame.pack()def close(self,event=None):quit()def main():ONE()mainloop()if __name__=='__main__':main()

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3 回答

ITMISS

TA贡献1871条经验获得超8个赞

python 把变量的值传递给execute的sql中去的代码：

import pymysql

db = pymysql.connect(host="119.XX.XX.XX",

port=3306,

user="XXXXXXXX",

passwd="XXXXXXXXXXXXX",

db="XXXXXX",

charset='utf8')

# %s 占位符为需要传递的参数，切记不要加''双引号，要不然会报错

sql = "SELECT totalusercount * 1.4 FROM mm_project_uv_outdoor WHERE poiid = %s AND currenttime = %s"

cursor = db.cursor()

# 以下为传递多个参数的用法

cursor.execute(sql,['B00140N5CS','2019-04-23'])

# 传递单个参数时 cursor.execute(sql,'B00140N5CS')

print(cursor.fetchall())

db.close()

扩展资料：

函数

Python的函数支持递归、默认参数值、可变参数，但不支持函数重载。为了增强代码的可读性，可以在函数后书写“文档字符串”(Documentation Strings，或者简称docstrings)，用于解释函数的作用、参数的类型与意义、返回值类型与取值范围等。可以使用内置函数help()打印出函数的使用帮助。比如：

>>> def randint(a, b):

... "Return random integer in range [a, b], including both end points."...

>>> help(randint)

Help on function randint in module __main__:

randint(a, b)

Return random integer inrange[a, b], including both end points.

反对回复 2022-11-01

当年话下

TA贡献1890条经验获得超9个赞

问题：
curs.execute("select * from tables where userid=%s and code=%s")%(IDEntry2.get(),%IDEntry1.get()) #Entry获取的值无法当成变量传递给execute的sql语句中。
问题是IDEntry1之前多了一个%
解决：
#curs.execute("select * from tables where userid=‘aaa’ and code=‘123’") //直接写死就可以
按照可以的进行替换
selectSql = "select * from tables where userid=‘%s’ and code=‘%s’" % (str(IDEntry2.get()),str(IDEntry1.get()))#加str确认与%s匹配
curs.execute(selectSql)