Python 使用pool和map的多处理问题

我想通过在python中使用pool和map函数获得输出，如下所示：

**以随机顺序输出：

PoolWorker-10输出：[0,4,8,12,16,20]

PoolWorker-11输出：[0,4,8,12,16,20]

PoolWorker-12输出：[0,4,8,12,16,20]

PoolWorker-1输出：[0,4,8,12,16,20]

………**

我曾多次尝试将输出结果和当前_进程名称一起写入行中，但都失败了。我不知道应该改变哪一个以获得像上面那样的打印输出

from multiprocessing import Pool, current_process

def multiprocessing_func():
   input_list = [0, 1, 2, 3, 4, 5]
   print("input list: {}".format(input_list))
   print("Output in random order: ")

   pool = Pool(10, current_process_func)
   result = pool.map(calculate, input_list)
   print(result)
   pool.close()
   pool.join()

def calculate(y_list):
   return y_list * 4

def current_process_func():
   print("{} output: ".format(current_process().name))

if __name__ == '__main__':
   multiprocessing_func()

---

当我运行它时，我得到如下结果：

以随机顺序输出：

PoolWorker-1输出：

PoolWorker-2输出：

PoolWorker-3输出：

PoolWorker-4输出：

PoolWorker-5输出：

PoolWorker-7输出：

PoolWorker-6输出：

[0,4,8,12,16,20]

PoolWorker-8输出：

PoolWorker-9输出：

PoolWorker-10输出：

---

---

我应该改变什么来获得我想要的结果

更改了您的代码片段，如下所示。整体考虑如下：

• pool.map（func，data）

  数据应理解为要分布在cpu池中的数据（也是此进程的专用数据）。此外，至少应该有尽可能多的项目和流程，以充分利用池。（我刚刚在那里列出了10个相同的列表）

• 跳过了

  Pool（）

  构造中的初始化参数，以便在计算完成后仅输出所需的数据

  from multiprocessing import Pool, current_process
  
  def multiprocessing_func():
      input_list = [0, 1, 2, 3, 4, 5]
      print("input list: {}".format(input_list))
      print("Output in random order: ")
  
      pool = Pool(10) 
      result = pool.map(calculate, [input_list]*10)
  
      print()
      print("collected:" , result)
      pool.close()
      pool.join()
  
  def calculate(y_list):
      out = [x*4 for x in y_list] 
      current_process_func(out)
      return out   
  
  def current_process_func(data):
      print("{} output: {}".format(current_process().name, data))
  
  if __name__ == '__main__':
      multiprocessing_func()
  

导致：

input list: [0, 1, 2, 3, 4, 5]
Output in random order: 
ForkPoolWorker-52 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-55 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-57 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-51 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-53 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-54 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-56 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-58 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-60 output: [0, 4, 8, 12, 16, 20]
ForkPoolWorker-59 output: [0, 4, 8, 12, 16, 20]

collected: [[0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4,    8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20], [0, 4, 8, 12, 16, 20]]

这是你期望的吗