我一直在尝试创建一个 csv 文件，该文件将更改所有子网和 IP 地址范围，因此没有重叠。最初的问题在这里Editing csv file to edit subnets 因此 IP 范围没有重叠（Python 3.3 中的 ipaddress 模块），但我已经修复了它，所以if语句停止了ValueErrors 并且第二个问题实际上不是问题。如果我可以重置迭代器，我相信我可以完成这项工作。它需要将 file1 中的每一行与 file2 中的每一行进行比较。
当我尝试这个时：
import ipaddress
import csv
from csv import DictReader, DictWriter
with open(r'file1.csv', newline='') as fin3,\
open(r'file2.csv', newline='') as fin4,\
open(r'file3.csv', 'w', newline='') as fout3:
read3 = DictReader(fin3) # fin 3 and 4 are copies of the same file
read4 = DictReader(fin4)
writenum3 = DictWriter(fout3, fieldnames=read3.fieldnames)
writenum3.writeheader()
for line3 in read3:
line3['Range']=ipaddress.ip_network(line3['Range']) # Convert IP ranges to ip network object
for line4 in read4:
line4['Range']=ipaddress.ip_network(line4['Range']) # Convert IP ranges to ip network object
if line3['Range'].netmask < line4['Range'].netmask: # To avoid "Not contained in" errors
if line3['Range'].overlaps(line4['Range']): # Tests for IP overlap
lst=list(line3['Range'].address_exclude(line4['Range'])) # List of subnets excluding line4 subnet
print (lst) # Temporary to view contents of lst
for val in lst:
line3['Range']=val # New range
line3[' IPStart']=val.network_address #New net address
line3[' IPStop']=val.broadcast_address #New broadcast address
writenum3.writerow(line3) # Write lines
它仅将 file1 的第一行（不是标题）与 file2 的第二行（不是标题）进行比较。
当我有这个（使用file.seek(0)）：
import ipaddress
import csv
from csv import DictReader, DictWriter
with open(r'file1.csv', newline='') as fin3,\
open(r'file2.csv', newline='') as fin4,\
open(r'file3.csv', 'w', newline='') as fout3:
read3 = DictReader(fin3) # fin 3 and 4 are copies of the same file
read4 = DictReader(fin4)
writenum3 = DictWriter(fout3, fieldnames=read3.fieldnames)
writenum3.writeheader()
for line3 in read3:
line3['Range']=ipaddress.ip_network(line3['Range']) # Convert IP ranges to ip network object
fin4.seek(0)
for line4 in read4:
line4['Range']=ipaddress.ip_network(line4['Range']) # Convert IP ranges to ip network object
if line3['Range'].netmask < line4['Range'].netmask: # To avoid "Not contained in" errors
if line3['Range'].overlaps(line4['Range']): # Tests for IP overlap
lst=list(line3['Range'].address_exclude(line4['Range'])) # List of subnets excluding line4 subnet
print (lst) # Temporary to view contents of lst
for val in lst:
line3['Range']=val # New range
line3[' IPStart']=val.network_address #New net address
line3[' IPStop']=val.broadcast_address #New broadcast address
writenum3.writerow(line3) # Write lines
它给出了一个错误ValueError: 'Range' does not appear to be an IPv4 or IPv6 network。
如果我尝试该list()方法（此处解释：Can iterators are reset in Python?）：
import ipaddress
import csv
from csv import DictReader, DictWriter
with open(r'file1.csv', newline='') as fin3,\
open(r'file2.csv', newline='') as fin4,\
open(r'file3.csv', 'w', newline='') as fout3:
read3 = list(DictReader(fin3)) # fin 3 and 4 are copies of the same file
read4 = list(DictReader(fin4))
writenum3 = DictWriter(fout3, fieldnames=read3.fieldnames)
writenum3.writeheader()
for line3 in read3:
line3['Range']=ipaddress.ip_network(line3['Range']) # Convert IP ranges to ip network object
fin4.seek(0) # Reset iterator
for line4 in read4:
line4['Range']=ipaddress.ip_network(line4['Range']) # Convert IP ranges to ip network object
if line3['Range'].netmask < line4['Range'].netmask: # To avoid "Not contained in" errors
if line3['Range'].overlaps(line4['Range']): # Tests for IP overlap
lst=list(line3['Range'].address_exclude(line4['Range'])) # List of subnets excluding line4 subnet
print (lst) # Temporary to view contents of lst
for val in lst:
line3['Range']=val # New range
line3[' IPStart']=val.network_address #New net address
line3[' IPStop']=val.broadcast_address #New broadcast address
writenum3.writerow(line3) # Write lines
它给出了AttributeError: 'list' object has no attribute 'fieldnames'错误。
我想知道我是否应该为此使用http://docs.python.org/3.4/library/itertools.html tee()，但我不确定如何在这里使用它，或者它是否可以工作。
这是我的文件 1 和文件 2：
Zone Name, IPStart, IPStop,Range,Source
Group A,10.0.0.0,10.127.255.255,10.0.0.0/9,New List
Group A Sales,10.16.0.0,10.31.255.255,10.16.0.0/12,New List
Group A Marketing,10.62.0.0,10.62.255.255,10.62.0.0/16,New List
Group A Research,10.62.0.0,10.63.255.255,10.62.0.0/15,Old List
Group A Sales Primary routers,10.23.1.0,10.23.1.15,10.24.1.0/28,New List
Group A Sales Web Servers - Primary,10.18.0.0,10.18.0.255,10.18.0.0/24,New List
Group A Sales Web Servers,10.16.0.0,10.19.255.255,10.16.0.0/14,New List
Group B,10.128.0.0,10.255.255.255,10.128.0.0/9,Old List
这就是我最终想要的（尽管现在每个比较的所有子网都可以）：
Zone Name, IPStart, IPStop,Range,Source
Group A,10.0.0.0,10.15.255.255,10.0.0.0/12,New List
Group A,10.32.0.0,10.47.255.255,10.32.0.0/12,New List
Group A,10.48.0.0,10.55.255.255,10.48.0.0/13,New List
Group A,10.56.0.0,10.59.255.255,10.56.0.0/14,New List
Group A,10.60.0.0,10.61.255.255,10.60.0.0/15,New List
Group A,10.64.0.0,10.127.255.255,10.64.0.0/10,New List
Group A Marketing,10.62.0.0,10.62.255.255,10.62.0.0/16,New List
Group A Research,10.63.0.0,10.63.255.255,10.63.0.0/16,Old List
Group A Sales,10.20.0.0,10.21.255.255,10.20.0.0/15,New List
Group A Sales,10.22.0.0,10.22.255.255,10.22.0.0/16,New List
Group A Sales,10.23.0.0,10.23.0.255,10.23.0.0/24,New List
Group A Sales,10.23.1.128,10.23.1.255,10.23.1.128/25,New List
Group A Sales,10.23.1.16,10.23.1.31,10.23.1.16/28,New List
Group A Sales,10.23.1.32,10.23.1.63,10.23.1.32/27,New List
Group A Sales,10.23.1.64,10.23.1.127,10.23.1.64/26,New List
Group A Sales,10.23.128.0,10.23.255.255,10.23.128.0/17,New List
Group A Sales,10.23.16.0,10.23.31.255,10.23.16.0/20,New List
Group A Sales,10.23.2.0,10.23.3.255,10.23.2.0/23,New List
Group A Sales,10.23.32.0,10.23.63.255,10.23.32.0/19,New List
Group A Sales,10.23.4.0,10.23.7.255,10.23.4.0/22,New List
Group A Sales,10.23.64.0,10.23.127.255,10.23.64.0/18,New List
Group A Sales,10.23.8.0,10.23.15.255,10.23.8.0/21,New List
Group A Sales,10.24.0.0,10.31.255.255,10.24.0.0/13,New List
Group A Sales,10.24.32.0,10.24.63.255,10.24.32.0/19,New List
Group A Sales Primary routers,10.23.1.0,10.23.1.15,10.24.1.0/28,New List
Group A Sales Web Servers,10.16.0.0,10.17.255.255,10.16.0.0/15,New List
Group A Sales Web Servers,10.19.0.0,10.19.255.255,10.19.0.0/16,New List
Group A Sales Web Servers,10.18.128.0,10.18.255.255,10.18.128.0/17,New List
Group A Sales Web Servers,10.18.64.0,10.18.127.255,10.18.64.0/18,New List
Group A Sales Web Servers,10.18.32.0,10.18.63.255,10.18.32.0/19,New List
Group A Sales Web Servers,10.18.16.0,10.18.31.255,10.18.16.0/20,New List
Group A Sales Web Servers,10.18.8.0,10.18.15.255,10.18.8.0/21,New List
Group A Sales Web Servers,10.18.4.0,10.18.7.255,10.18.4.0/22,New List
Group A Sales Web Servers,10.18.2.0,10.18.3.255,10.18.2.0/23,New List
Group A Sales Web Servers,10.18.1.0,10.18.1.255,10.18.1.0/24,New List
Group A Sales Web Servers - Primary,10.18.0.0,10.18.0.255,10.18.0.0/24,New List
Group B,10.128.0.0,10.255.255.255,10.128.0.0/9,Old List
任何帮助都值得赞赏，以使其按应有的方式工作。
谢谢， B0T