IndentationError während eine Python-Code ausführen

Question

from os import popen 
from string import split, join 
from re import match 
import subprocess 
import os 
    # execute the code and pipe the result to a string 
rtr_table = [elem.strip().split() for elem in popen("route print").read().split("Metric\n")[1].split("\n") if match("^[0-9]", elem.strip())] 
#print "Active default gateway:", rtr_table[0][2] 
x=rtr_table[0][2] 
#x has a.a.a.a 
y = x[:x.rfind(".")] 
# y has a.a.a 
# in order to test in range of 1 to 255 for the default gateway 
for i in range(1,255): 
#ping by sending 1 packet and wait for 500 milli seconds 
test = "ping -n 1 -w 500 %s.%d" % (y,i) 
process = subprocess.Popen(test, shell=True, stdout=subprocess.PIPE) 
    # give it time to respond 
process.wait() 
    # optional check (0 --> success) 
    #print process.returncode 
    # read the result to a string 
result_str = process.stdout.read() 
    # test it ... 
    # print result_str 
#from arp we get mac address and corresponding ip address and state as we use '-a' 
lines=os.popen('arp -a') 
for line in lines: 
    print line 
sh-4.3$ python main.py                                       
    File "main.py", line 20                                      
    test = "ping -n 1 -w 500 %s.%d" % (y,i)                                  
    ^                                          
IndentationError: expected an indented block                         

durch den obigen Code gehen Sie und identifizieren Sie bitte den Fehler, den es wie in Test sucht = „ping“ Linie eine IndentationError

Answer 1

from os import popen 
from string import split, join 
from re import match 
import subprocess 
import os 
    # execute the code and pipe the result to a string 
rtr_table = [elem.strip().split() for elem in popen("route print").read().split("Metric\n")[1].split("\n") if match("^[0-9]", elem.strip())] 
#print "Active default gateway:", rtr_table[0][2] 
x=rtr_table[0][2] 
#x has a.a.a.a 
y = x[:x.rfind(".")] 
# y has a.a.a 
# in order to test in range of 1 to 255 for the default gateway 
for i in range(1,255): 
    #ping by sending 1 packet and wait for 500 milli seconds 
    test = "ping -n 1 -w 500 %s.%d" % (y,i) 
    process = subprocess.Popen(test, shell=True, stdout=subprocess.PIPE) 
    # give it time to respond 
    process.wait() 
    # optional check (0 --> success) 
    #print process.returncode 
    # read the result to a string 
    result_str = process.stdout.read() 
    # test it ... 
    # print result_str 
    #from arp we get mac address and corresponding ip address and state as we use '-a' 
lines=os.popen('arp -a') 
for line in lines: 
    print line 

Sie Vertiefung unterhalb der ersten vergessen wird immer für Schleife