感谢您花时间看这个，对此有任何帮助将非常感谢！
我试图通过ping一个名为ips的IP地址列表来获取一些网络统计数据。然而我遇到的问题是我的输出是一个包含几个'None'的列表。在实现线程以运行子进程命令之前，下面显示的输出是一系列数字。如果有人可以看一下我的源代码并对这个问题有所了解，我将非常感激！
提前谢谢！
import subprocess
import re
import threading
from multiprocessing import Pool, Lock
from multiprocessing.dummy import Pool as ThreadPool
def get_ips():
# Fill empty list with IP address
ips = []
with open('C:\Python26\ARPips.prn','r')as f:
for line in f:
line = line[:-1]
if line != "end":
ips.append(line)
return ips
def ping(pingArgs):
lock = Lock()
lock.acquire()
# Ping with "pingArgs" as the arguments
ping = subprocess.Popen(pingArgs,
stdout = subprocess.PIPE,
stderr = subprocess.PIPE,
shell=True)
# Get and parse output
out = ping.communicate()
out = ''.join((out))
lost = re.findall(r"Lost = (\d+)", out)
minimum = re.findall(r"Minimum = (\d+)", out)
maximum = re.findall(r"Maximum = (\d+)", out)
avg = re.findall(r"Average = (\d+)", out)
no = re.findall(r"Sent = (\d+)", out)
# Change output to integers
lost = [int(x) for x in lost]
minimum = [int(x) for x in minimum]
maximum = [int(x) for x in maximum]
avg = [int(x) for x in avg]
no = [int(x) for x in no]
print "%s \t \t %s \t \t%s \t \t %s \t \t%s" % (no, lost, maximum, minimum, avg)
lock.release()
def main():
# grab IP address list
ips = get_ips()
# Declare global variables
global position, newIP, pingArgs
position = 0
newIP = ips[position]
position += 1
pingArgs = ["ping", "-n", "1", "-l", "1", "-w", "100", newIP]
# Header for output
print "Packets \t loss(%) \t Max(ms) \t Min(ms) \t Average(ms)"
# Instantiate Pool objects, and set size of pool
pool = Pool(processes=12)
#Ping ips in own threads and return the results
result = pool.map(ping, ips)
# Close the pool and wait for work to finish
pool.close()
pool.join()
# print the results
print result
if __name__ == '__main__':
main()
print get_ips()
输出如下所示：
Packets loss(%) Max(ms) Min(ms) Average(ms)
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[] [] [] [] []
[None, None, None, None, None, None, None, None, None, None, None, None, None, None, None, None]
['10.10.10.1', '10.10.10.41', '10.10.10.42', '10.10.10.43', '10.10.10.49', '10.10.10.51', '10.10.10.61', '10.10.10.71', '10.10.10.91', '10.10.10.92', '10.10.10.201', '10.10.10.205', '10.10.10.208', '10.10.10.209', '10.10.10.213', '10.10.10.214']
Process finished with exit code 0
答案 0 :(得分：2)
我遇到的问题是我的输出是一个包含几个'无'的列表
None由print result生成result = pool.map(ping, ips)，因为ping()函数不返回任何内容（这意味着它在Python中返回None）。
在实现线程以运行子进程命令之前，下面显示的输出是一系列数字。
您正在将IP地址传递给Popen()而不是要运行的完整ping命令。
您定义的global pingArgs未在任何地方使用（pingArgs中的本地ping()遮盖它）。您可以通过在同一进程和同一线程中创建结果列表的内置pool.map调用替换map，以查看结果是否相同（正则表达式不匹配）且错误不是与线程/进程有关。
本地 lock = Lock()没用。
以下是解决上述问题的代码：
#!/usr/bin/env python
import re
from multiprocessing.dummy import Pool # use threads
from subprocess import Popen, PIPE
def get_ips(filename):
ips = []
with open(filename) as f:
for line in f:
line = line.strip()
if line and line != "end":
ips.append(line)
return ips
def ping(ip):
cmd = ["ping", "-n", "1", "-l", "1", "-w", "100", ip]
ping = Popen(cmd, stdout=PIPE, stderr=PIPE)
# Get and parse output
output, err = ping.communicate()
out = ''.join([output, err])
lost = re.findall(r"Lost = (\d+)", out)
minimum = re.findall(r"Minimum = (\d+)", out)
maximum = re.findall(r"Maximum = (\d+)", out)
avg = re.findall(r"Average = (\d+)", out)
no = re.findall(r"Sent = (\d+)", out)
# Change output to integers
lost = [int(x) for x in lost]
minimum = [int(x) for x in minimum]
maximum = [int(x) for x in maximum]
avg = [int(x) for x in avg]
no = [int(x) for x in no]
return "%s \t \t %s \t \t%s \t \t %s \t \t%s" % (
no, lost, maximum, minimum, avg)
def main():
# grab IP address list
ips = get_ips(r'C:\Python26\ARPips.prn')
# Header for output
print "Packets \t loss(%) \t Max(ms) \t Min(ms) \t Average(ms)"
# Instantiate Pool objects, and set size of pool
pool = Pool(processes=12)
#Ping ips in own threads and return the results
results = pool.map(ping, ips)
# Close the pool and wait for work to finish
pool.close()
pool.join()
# print the results
print "\n".join(results)
if __name__ == '__main__':
main()
答案 1 :(得分：0)
这就是我（unix）系统的工作原理
import subprocess
import re
from multiprocessing import Pool, Lock
lock = Lock()
pingArgs = "ping -n -l 1 -w 100 "
def get_ips():
# Fill empty list with IP address
ips = []
with open('C:\\Python26\\ARPips.prn', 'r')as f:
for line in f:
line = line[:-1]
if line != "end":
ips.append(line)
return ips
def ping(ip):
global lock
pingCommand = pingArgs + ip
lock.acquire()
# Ping with "pingArgs" as the arguments
ping = subprocess.Popen(pingCommand,
stdout = subprocess.PIPE,
stderr = subprocess.PIPE,
shell=True)
# Get and parse output
out = ping.communicate()
out = ''.join((out))
lost = re.findall(r"Lost = (\d+)", out)
minimum = re.findall(r"Minimum = (\d+)", out)
maximum = re.findall(r"Maximum = (\d+)", out)
avg = re.findall(r"Average = (\d+)", out)
no = re.findall(r"Sent = (\d+)", out)
# Change output to integers
lost = [int(x) for x in lost]
minimum = [int(x) for x in minimum]
maximum = [int(x) for x in maximum]
avg = [int(x) for x in avg]
no = [int(x) for x in no]
lock.release()
return "%s \t \t %s \t \t%s \t \t %s \t \t%s" % (no, lost, maximum, minimum, avg)
def main():
# grab IP address list
ips = get_ips()
# Header for output
print("Packets \t loss(%) \t Max(ms) \t Min(ms) \t Average(ms)")
# Instantiate Pool objects, and set size of pool
pool = Pool(processes=12)
#Ping ips in own threads and return the results
results = pool.map(ping, ips)
# Close the pool and wait for work to finish
pool.close()
pool.join()
# print the results
for result in results:
print(result)
if __name__ == '__main__':
main()
print(get_ips())
我遇到的代码问题是ping参数不正确（-n没有接受任何其他参数），lock应该是全局的，shell=True时它不需要一个列表，只有一个字符串，而ping(pingArgs)可以覆盖全局参数，而你希望池只将ip发送给worker，然后worker应该将它添加为最终参数。
我也注意到你没有逃避你在dist上的文件路径，我没有使用/测试那部分，但包括它正确转义以供参考。
编辑：也改变了它，因此每个函数只返回要打印的值，并在完成时打印所有这些值。而不是将它们打印在函数内部以及函数的结果而不返回（Nones列表）。