Question

我有一个我想在循环中运行的文件。我的文件看起来像这样：

Hello Hello
A B C D
A B C D
B C D A
B C D A
C D A B
B C D A

Hello Bye
A C D B
C D A B
A C D B
D C A B

我只通过Bye运行一个循环到空行。

它应该返回：

 {(A, C, D, B): 2, (C, D, A, b):1, (D, C, A, B):1}

有没有办法可以调用'all'来添加所有的排列？

我想在不使用任何导入的情况下执行此操作。

到目前为止，我的功能看起来像这样：

# input_word = Hello or Bye
def file_to_dict (file, input_word):
    new_dict = {}
    new_list = []

    flag = False
    for line in f:
        if 'Hello' in line:
            continue
        if not line.strip():
            continue
        lElts = tuple(line.split(' '))
        if lElts in dRet:
            dRet[lElts] += 1
        else:
            dRet[lElts] = 1
    return dRet

还有替代方案吗？

现在这给了我一个错误说：

ValueError: I/O operation on closed file

Answer 1

read = False    
counting_dict = {}
#run through the lines in the file
for line in file:
    if read and 'Hello' not in line:
        #do as if the entry already exists
        try:
            counting_dict[tuple(line.split())] += 1
        #if not, create it
        except KeyError:
            counting_dict[tuple(line.split())] = 1
    elif 'Bye' in line:
        read = True
    #if 'Hello' is in the line but 'Bye' is not,set read to False
    else:
        read = False

Answer 2

类似这样的内容，在hello Bye处拆分，然后使用dict.get()将值添加到字典中。

In [17]: with open("data.txt") as f:

    spl=f.read().split("Hello Bye")

    #now spl[1] is  

    #
    #A C D B
    #C D A B
    #A C D B
    #D C A B

    #we need to now split these at '\n', or may be use `splitlines()`
    #for every line apply split, which returns ['D', 'C', 'A', 'B']
    #apply tuple() to it, to make it hashable.
    #now you can use use either defaultdict(int) or dict.get() as used below.

    dic={}                         
    for x in spl[1].split('\n'):
        if x.strip():
            key=tuple(x.split())
            dic[key]=dic.get(key,0)+1;
    print dic
   ....:     
{('D', 'C', 'A', 'B'): 1, ('A', 'C', 'D', 'B'): 2, ('C', 'D', 'A', 'B'): 1}

Answer 3

存在大量逻辑错误......我建议您查看elif的工作原理

def f_to_dict(f):
    dRet = {}
    for line in f:
        if 'Hello' in line:
            continue
        if not line.strip():
            continue
        lElts = tuple(line.split(' '))
        if lElts in dRet:
            dRet[lElts] += 1
        else:
            dRet[lElts] = 1
    return dRet

如何从文件列表中更改为字典

3 个答案: