工人的齒輪人功能仍未定義

Question

我有一個非常簡單的工人代碼，可能會犯一些愚蠢的錯誤。

class BingWorker(object): 
    def __init__(self): 
     self.gm_worker = gearman.GearmanWorker(['localhost:4730']) 
     completed_job_request = self.gm_worker.register_task('bingmedia', callBing) 

    def callBing(self, gearman_worker, gearman_job): 
     print "In worker ", gearman_job.data 
     return "Kools" 

    def run(self): 
     self.gm_worker.work() 

if __name__ == '__main__': 
    BingWorker().run() 

給

Traceback (most recent call last): 
    File "worker.py", line 16, in <module> 
    BingWorker().run() 
    File "worker.py", line 6, in __init__ 
    completed_job_request = self.gm_worker.register_task('bingmedia', callBing) 
NameError: global name 'callBing' is not defined 

任何提示？示例與http://gearman.org/examples/reverse/上的python示例非常相似。只是把階級結構

改進代碼：

class BingWorker(object): 
    def __init__(self): 
     self.gm_worker = gearman.GearmanWorker(['localhost:4730']) 

    def callBing(self, gearman_worker, gearman_job): 
     print "In worker ", gearman_job.data 
     return "Kools" 

    def run(self): 
     completed_job_request = self.gm_worker.register_task('bingmedia', self.callBing) 
     self.gm_worker.work() 

if __name__ == '__main__': 
    BingWorker().run() 

Answer 1

您需要更改callBing到self.callBing，它可能是更好的登記移到run方法的第一線，而不是__init__方法。

首先是因爲callBing是缺失全局的引用，而self.callBing是對類方法的引用。第二個是因爲你可能會在初始化完成之前接到self.callBing的電話，這將是一個壞消息。