如何使用 Python 动态创建列表字典

Question

我有这个输入要处理：

['', '', '', '', '  Huawei Integrated Access Software (MA5600T).', '  Copyright(C) Huawei Technologies Co., Ltd. 2002-2014. All rights reserved.', '', '  -----------------------------------------------------------------------------', '  User last login information:', '  -----------------------------------------------------------------------------', '  Access Type : Telnet ', '  IP-Address  : 1.1.1.1', '  Login  Time : 2020-12-24 11:51:33+01:00', '  Logout Time : 2020-12-24 11:51:38+01:00', '  -----------------------------------------------------------------------------', '', 'OLT-SALUZZO_01>enable', '', 'OLT-SALUZZO_01#display ont autofind all \x1b[1D\x1b[1C', '   ----------------------------------------------------------------------------', '   Number              : 1', '   F/S/P               : 0/17/7', '   Ont SN              : 485754437D85CA9E (HWTC-7D85CA9E)', '   Password            : 0x00000000000000000000', '   Loid                : ', '   Checkcode           : ', '   VendorID            : HWTC', '   Ont Version         : 159D.A', '   Ont SoftwareVersion : V5R019C00S100', '   Ont EquipmentID     : EG8145V5', '   Ont autofind time   : 2020-12-24 08:38:28+01:00', '   ----------------------------------------------------------------------------', '   Number              : 2', '   F/S/P               : 0/17/7', '   Ont SN              : 48575443A9517A9E (HWTC-A9517A9E)', '   Password            : 0x00000000000000000000', '   Loid                : ', '   Checkcode           : ', '   VendorID            : HWTC', '   Ont Version         : 159D.A', '   Ont SoftwareVersion : V5R019C00S100', '   Ont EquipmentID     : EG8145V5', "---- More ( Press 'Q' to break ) ----"]

我需要从中创建一个这样的输出：

[{'F/S/P': '0/17/7', 'SN': ' 485754437D85CA9E', 'Password': None}, {'F/S/P': '0/17/7', 'SN': '48575443A9517A9E ', 'Password': None}]

我的功能是这样的：

tn.write("display ont autofind all ".encode('utf-8') + b"\n")
return_lineid = tn.read_until('The number of GPON'.encode('utf-8'), 3).decode('utf-8')
data_return = return_lineid.splitlines()
autofind_list=[]
records = []
current_record = {}
for line in data_return:
    line = line.strip()
    if not line:  # empty line
        records.append(current_record)
        current_record = {}
    else:
        if "F/S/P" in line:
            key, value = line.split(':')
            key = key.strip()
            value = value.strip()
            current_record[key] = value
            print(current_record)
        if "Ont SN" in line:
            key, value = line.split(':')
            key = key.strip()
            value = value.strip()
            value = re.sub(r'\(.*\)', '', value)
            current_record[key] = value
            print(current_record)
        if "Password" in line:
            key, value = line.split(':')
            key = key.strip()
            value = value.strip()
            if value == '0x00000000000000000000':
                current_record[key]=None
            else:
                current_record[key] = value

        autofind_list.append(current_record.copy())

#for removing same records
seen = set()
new_l = []
for d in autofind_list:
    t = tuple(d.items())
    if t not in seen:
        seen.add(t)
        new_l.append(d)

print(new_l)

但它返回了这个，我几乎达到了我的目标：

[{}, {'F/S/P': '0/17/7'}, {'F/S/P': '0/17/7', 'Ont SN': '485754437D85CA9E '}, {'F/S/P': '0/17/7', 'Ont SN': '485754437D85CA9E ', 'Password': None}, {'F/S/P': '0/17/7', 'Ont SN': '48575443A9517A9E ', 'Password': None}]

但我想删除无用的对象，例如 {}, {'F/S/P': '0/17/7'}

有人可以帮我解决这个问题吗？或者能给我一个提示吗？

提前谢谢你

Answer 1

我不确定您对此autofind_list 的计划是什么，但我认为这是您尝试解决在records 中没有出现一条记录的问题。这可以通过在循环完成后简单地添加current_record 来解决。

那么唯一的问题是第一个空记录，因为在开头有一个不必要的空行。这可以通过在将 current_record 添加到 records 之前简单地检查是否已填充来完成（如果两个空行在一行中，这也可以防止出现问题）。

这里是完整的代码：

records = []
current_record = {}
for line in data_return:
    line = line.strip()
    if not line:  # empty line
        if current_record: # no data recorded
            records.append(current_record)
            current_record = {}
    else:
        if "F/S/P" in line:
            key, value = line.split(':')
            key = key.strip()
            value = value.strip()
            current_record[key] = value
        if "Ont SN" in line:
            key, value = line.split(':')
            key = key.strip()
            value = value.strip()
            value = re.sub(r'\(.*\)', '', value)
            current_record[key] = value
        if "Password" in line:
            key, value = line.split(':')
            key = key.strip()
            value = value.strip()
            if value == '0x00000000000000000000':
                current_record[key] = None
            else:
                current_record[key] = value

if current_record:
    records.append(current_record)

records 现在包含我认为您想要的列表。

---

由于您在帖子中的示例数据实际上并不代表您给出的输入，其中记录由---- 仅破折号线分隔，您需要将if not line: 替换为if not line or set(line) == {'-'}:。