Question

我正在尝试解析一个字符串，然后在制作python字典后进行一些计算。但我遇到了问题。这就是我到目前为止所写的内容......

name = raw_input("Enter name of the file")
if len(name) < 1:
    name = "test.txt"
fh = open(name)

count = dict()
new = ""
for line in fh:
    line = line.rstrip()
    if line.startswith("From "):
        time = line.split()
        time = time[5]
        hr = time.split(":")
        new.append(hr[0])
        count[new] = count.get(new,0) + 1
        print count

基本上我想读取一个文件，根据特定的模式选择一条线（在这种情况下，行以“From”开头），拆分选定的行，再次根据“：”拆分选定的行。一旦有第一列（基本上是两位数的例子 - 09,11,24,11,11,11等），然后进行数字计数，然后报告数字，然后计算数量。但是我的代码出错了。 AttributeError: 'str' object has no attribute 'append' on line 14

有任何帮助吗？

Answer 1

import collections
import re

REGEX = r'^From\s+(?:\S\s){4}(\d+):.*$'

file_name = raw_input("Enter the name of the file: ")
if file_name == '':
    file_name = 'test'

with open(file_name, 'r') as f:
    file_content = f.read() # assuming the file isn't too large

numbers = re.findall(REGEX, file_content, re.MULTILINE)
print collections.Counter(numbers) # count '09' and '009' as different numbers
print collections.Counter([int(i) for i in numbers]) # count '09' and '009' as the same number

如何解析一个字符串并制作一个python字典

1 个答案: