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python - Python NameError：未定义全局名称

问题描述

我正在尝试在另一个函数中使用一个函数及其给出错误。我正在使用类作为结构。我尝试将块初始化为零，但它没有用。块也是一个字节

Chunk = bytearray(b'\x00') # is it a good idea to use this or any other options?

class Prog:
    PROGRAMMING_FLAG       = False
    SET_ADD_FLAG           = False
    DATA_FLAG              = False
    ADD_COMMAND_FLAG       = False
    ERASE_FLAG             = False
    ATTEMPT                = 1

def prog_flash(Chunk):

try:
    Prog.DATA_BUFFER = []
    Prog.ADD_COMMAND_FLAG = True
    Prog.DATA_BUFFER.append(hex(0x02))
    No_Of_Bytes = Chunk * 64
    for index in range(0,64):
        Prog.DATA_BUFFER.append(hex(DataBuffer[No_Of_Bytes+index]))
    Prog.DATA_BUFFER.append(hex(Calculate_Checksum(Prog.DATA_BUFFER[1:Prog.DATA_BUFFER.__len__()])))
    Prog.DATA_FLAG = True
    return Prog.DATA_BUFFER

except Exception, e:
    print("Error")
    pass

def other_fn():
   prog_flash(Chunk)

错误：

NameError：未定义全局名称“块”

标签： pythonpython-2.7classglobalnameerror

解决方案

DataBuffer 未定义，Calculate_Checksum 也未定义，

结构应该像

Chunk = bytearray(b'\x00') # is it a good idea to use this or any other options?

class Prog:
    PROGRAMMING_FLAG       = False
    SET_ADD_FLAG           = False
    DATA_FLAG              = False
    ADD_COMMAND_FLAG       = False
    ERASE_FLAG             = False
    ATTEMPT                = 1

def prog_flash(Chunk):

    try:
        Prog.DATA_BUFFER = []
        Prog.ADD_COMMAND_FLAG = True
        Prog.DATA_BUFFER.append(hex(0x02))
        No_Of_Bytes = Chunk * 64
        for index in range(0,64):
            Prog.DATA_BUFFER.append(hex(DataBuffer[No_Of_Bytes+index]))
        Prog.DATA_BUFFER.append(hex(Calculate_Checksum(Prog.DATA_BUFFER[1:Prog.DATA_BUFFER.__len__()])))
        Prog.DATA_FLAG = True
        return Prog.DATA_BUFFER
    except Exception, e:
        # handle Expection
        print "There was an error: %s" %(e)
        pass


def other_fn():
    prog_flash(Chunk)


if __name__ == '__main__':
    other_fn()

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