python 错误--UnboundLocalError: local variable '**' referenced before assignment

昨日想在python的一个函数中做一下发送次数的统计，需要用到全局变量，如下

 1 COUNT = 0
 2
 3 def sendOneLineMsg(producer, listFromLine):
 4     acSNStr          = listFromLine[0]
 5     macStr           = listFromLine[1]
 6     onlineTimeStr = listFromLine[2]
 7     msg = {‘clientMAC‘ : macStr, ‘acSN‘ : acSNStr, ‘onLineTime‘ : onlineTimeStr}
 8     msgStr = json.dumps(msg)
 9     producer.produce(msgStr)
10     COUNT += 1

结果报该错误，解决办法是在函数中加一行，global COUNT 即可解决

时间： 2024-11-10 13:39:54

python 错误--UnboundLocalError: local variable '**' referenced before assignment的相关文章

【python】UnboundLocalError: local variable 'counter' referenced before assignment

http://passport.baidu.com/?business&un=%E4%BA%91%E9%BE%99%E5%8E%BF%5F%E5%B0%8F%E5%A7%90%5F%E6%89%BE#0 http://passport.baidu.com/?business&un=%E6%89%BE%5F%E6%B4%B1%E6%BA%90%E5%8E%BF%5F%E7%BE%8E%E5%A5%B3#0 http://passport.baidu.com/?business&un=

变量引用的错误：UnboundLocalError: local variable 'range' referenced before assignment

1 class Battery(): 2 """一次模拟电动汽车电瓶的简单尝试""" 3 def __init__(self,battery_size=70): 4 self.battery_size = battery_size 5 # self.range =range 6 def describe_battery(self): 7 print(self.battery_size) 8 9 def get_range(self): 10 pr

全局变量报错：UnboundLocalError: local variable 'l' referenced before assignment

总结: 内部函数,不修改全局变量可以访问全局变量内部函数,修改同名全局变量,则python会认为它是一个局部变量在内部函数修改同名全局变量之前调用变量名称(如print sum),则引发Unbound-LocalError 在程序中设置的sum属于全局变量,而在函数中没有sum的定义,根据python访问局部变量和全局变量的规则:当搜索一个变量的时候,python先从局部作用域开始搜索,如果在局部作用域没有找到那个变量,那样python就在全局变量中找这个变量,如果找不到抛出异常(NAMEE

全局变量报错：UnboundLocalError: local variable 'xxxxx' referenced before assignment

daibuchong 参考:http://blog.csdn.net/my2010sam/article/details/17735159 http://blog.csdn.net/onlyanyz/article/details/45009697 http://blog.csdn.net/magictong/article/details/4464024 全局变量报错:UnboundLocalError: local variable 'xxxxx' referenced before ass

UnboundLocalError: local variable 'a' referenced before assignment

首先,上一段代码: 1 def out(): 2 a=1 3 def inner(): 4 a+=1 5 print(a) 6 return inner 7 func = out() 8 func() 初略看上去没有什么问题,运行之后报错:UnboundLocalError: local variable 'a' referenced before assignment 翻译成中文:UnboundLocalError:在赋值之前引用的本地变量'a'. 那么问题来,这是个闭包函数,为啥不能引用本地

jsp的<%@ include file="jsp/common.jsp" %>报错误Duplicate local variable basePath

将公共引入的文件放到common.jsp中,其他页面引入该jsp即可使用 1 <%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> 2 <% 3 String path = request.getContextPath(); 4 String basePath = request.getScheme() + "://" 5 +

python的UnboundLocalError： local variable 'xxx' referenced before assignment

一.意思: 本地变量xxx引用前没定义. 二.错误原因在于python没有变量的声明 , 所以它通过一个简单的规则找出变量的范围 :如果有一个函数内部的变量赋值 ,该变量被认为是本地的,所以如果有修改变量的值就会变成局部变量. 三.产生这个错误的场景 python代码:val=9def test(flag): if flag: val = 1 else: print 'fuck' return val test(0)错误提示:U

python： local variable 'xxx' referenced before assignment

问题发现 xxx = 23 def PrintFileName(strFileName): if xxx == 23: print strFileName xxx = 24 PrintFileName("file") 报错 Traceback (most recent call last): File "C:/Users/Desktop/del.py", line 7, in <module> PrintFileName("file"

Python | local variable 'xxxx' referenced before assignment

>>> def func(num): ... def func_in(): ... num += 1 ... print(num) ... return func_in ... >>> fun = func(10) >>> fun <function func.<locals>.func_in at 0x1034410d0> >>> fun() Traceback (most recent call last)