Question

我听说并读到，使用C语言定义的类结构很容易定义大量信息（参见下面的C代码）。

我想用Python定义类似的方式。我对代码不太感兴趣，而且我是Python的新学习者组。

有关哪种方式可以轻松定义的任何建议？走dict很好，但class最好。

下面的C代码示例（我还有其他类似的结构和信息）：

typedef struct
{
    U16         ID;
    S8          Name[32];
    S8          Description[96];
    S8          Units[16];
    enum eType  Type;
    F32         Scaling;
    F32         Offset;
    BOOL        Writeable;
} sDataInfo;

/*  ID,     Name,                       Description,                Unit,    Type, Scaling, Offset, Writable */
sDataInfo data_items[] =
{
    0x0202, "dtc_num_of_faults_",       "Number of DTCs",           "",      u8,   1,       0,      FALSE,
    0x2007, "FlBodyVertLocSel_A_Meas_", "FL Vertical Acceleration", "m/s^2", s16,  0.05,    0,      FALSE,
    0x2008, "FrBodyVertLocSel_A_Meas_", "FR Vertical Acceleration", "m/s^2", s16,  0.05,    0,      FALSE,
    0x2022, "RlBodyVertLocSel_A_Meas_", "RL Vertical Acceleration", "m/s^2", s16,  0.05,    0,      FALSE
}

重要的是要知道每个代码都可以在Python中更改。在任何在线链中都没有回答上述问题。

并期待一些例子。

Answer 1

正如我在评论中所说的那样，我不确定你想要什么...但是这里有一个猜测：

from pprint import pprint
import sys

def sprintf(format, *args):
    return format % args

def _attributes_from_dict(d):
    self = d.pop('self')
    for n, v in d.items():
        setattr(self, n, v)

class DataInfo(object):
    fieldnames = 'id, name, description, units, type, scaling, offset, writeable'.split(', ')

    def __init__(self, id, name, description, units, type, scaling, offset, writeable):
        _attributes_from_dict(locals())

    def __repr__(self):  # optional
        values = tuple(getattr(self, fieldname) for fieldname in self.fieldnames)
        id = values[0]
        remainder = ', '.join(map(repr, values[1:]))
        return sprintf('%s(0x%04x, %s)', self.__class__.__name__, id, remainder)

u8, s16 = 0, 1  # enum eType names and values

data_items = [
    DataInfo(*args) for args in [
        (0x0202, "dtc_num_of_faults_",       "Number of DTCs",           "",      u8,  1,    0, False),
        (0x2007, "FlBodyVertLocSel_A_Meas_", "FL Vertical Acceleration", "m/s^2", s16, 0.05, 0, False),
        (0x2008, "FrBodyVertLocSel_A_Meas_", "FR Vertical Acceleration", "m/s^2", s16, 0.05, 0, False),
        (0x2022, "RlBodyVertLocSel_A_Meas_", "RL Vertical Acceleration", "m/s^2", s16, 0.05, 0, False),
    ]
]

pprint(data_items)

输出：

[DataInfo(0x0202, 'dtc_num_of_faults_', 'Number of DTCs', '', 0, 1, 0, False),
 DataInfo(0x2007, 'FlBodyVertLocSel_A_Meas_', 'FL Vertical Acceleration', 'm/s^2', 1, 0.05, 0, False),
 DataInfo(0x2008, 'FrBodyVertLocSel_A_Meas_', 'FR Vertical Acceleration', 'm/s^2', 1, 0.05, 0, False),
 DataInfo(0x2022, 'RlBodyVertLocSel_A_Meas_', 'RL Vertical Acceleration', 'm/s^2', 1, 0.05, 0, False)]

C结构到Python类还是dict？

1 个答案: