Question

我将日志记录配置为

import logging
logging.basicConfig(level=logging.DEBUG, format='%(asctime)s-%(levelname)s-%(process)d-%(processName)s-  %(message)s')
logging.debug("Start of program")

def factorial(n):
    logging.debug('Start of factorial(%s)' %(n))
    total = 1
    for i in range(n+1):
        total *= i 
        logging.debug('i is ' + str(i) + ', toal is ' + str(total))
    logging.debug('End of factorial(%s)' %(n))
    return total 
print(factorial(10))
logging.debug("End of program")

计划跟踪processName和processID，
不幸的是，它几乎没有提供有用的信息

$ python py_logging.py 
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  Start of program
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  Start of factorial(10)
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 0, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 1, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 2, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 3, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 4, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 5, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 6, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 7, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 8, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 9, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  i is 10, toal is 0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  End of factorial(10)
0
2019-03-20 23:11:15,014-DEBUG-12876-MainProcess-  End of program

MainProcess是什么意思？不公开任何信息

我认为这样的结构可能会有所帮助

2019-03-20 23:18:47,447-DEBUG-16076-MainProcess-  Start of program
systemd,1 splash
  `-systemd,2122 --user
      `-code,3521
          `-code,3539
              `-code,3691
                  `-bash,16025
                      `-python,16076 py_logging.py
                          `-sh,16077 -c pstree -asp 16076
                              `-pstree,16078 -asp 16076

2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  Start of factorial(10)
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 0, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 1, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 2, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 3, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 4, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 5, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 6, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 7, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 8, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 9, toal is 0
2019-03-20 23:18:47,493-DEBUG-16076-MainProcess-  i is 10, toal is 0
2019-03-20 23:18:47,494-DEBUG-16076-MainProcess-  End of factorial(10)
0
2019-03-20 23:18:47,494-DEBUG-16076-MainProcess-  End of program

我怎么理解MainProcess，主要是什么？

Answer 1

使用processName检索multiprocessing.current_process().name属性。这是主要过程的"MainProcess"（如果不使用multiprocessing模块，这就是所有操作）。对于以multiprocessing开头的子进程，可以在创建Process对象时指定新进程的名称，默认情况下它将是“ Process”，后跟一些数字，具体取决于多少个子进程你已经产生了。

记录格式为％process

1 个答案: