python - 从文件中获取 IP 地址并计算出现次数

Question

我是 python 的新手，在做学校作业时被卡住了。我应该从文件中获取 IP 地址，然后计算每个 IP 出现的次数并打印出结果。

我一直收到错误:Unhashable Type: 'list'

代码如下:

#!/usr/bin/python
import re

def grab_ip(file):
    ips = []
    occurence = {}
    with open (file) as file:
        for ip in file:
            ips.append(re.findall(r'(?:[\d]{1,3})\.(?:[\d]{1,3})\.(?:[\d]{1,3})\.(?:[\d]{1,3})', ip))
        for ipaddr in ips:
            if ipaddr in occurence:
                occurence[ipaddr] = occurence[ipaddr] + 1
            else:
                occurence[ipaddr] = 1
    for key, value in occurence.iteritems():
        print key, value
    return None
print grab_ip('FILE_WITH_IPS.txt')

谢谢!

Answer 1

re.findall() 将返回一个列表，因此尝试使用附加的花药循环:

#!/usr/bin/python
import re

def grab_ip(file):
    ips = []
    occurence = {}
    with open (file) as file:
        for ip in file:
            ip_data=re.findall(r'(?:[\d]{1,3})\.(?:[\d]{1,3})\.(?:[\d]{1,3})\.(?:[\d]{1,3})',ip)
            for i in ip_data:
                ips.append(i)
        for ipaddr in ips:
            if ipaddr in occurence:
                occurence[ipaddr] = occurence[ipaddr] + 1
            else:
                occurence[ipaddr] = 1
    for key, value in occurence.iteritems():
        print key, value
    return None
print grab_ip('data')

这里是文件数据行:

123.0.9.1
fjdakl
jfkal 23.2.2.9

函数返回无