Pyserial对象进行循环

Question

我打开4个串口使用这种方法：

ComPorts = ['com11','com13','com7','com19'] 
stimeout = 0.000120 ## 120 us character timeout 
baud = 115200 
serList = {} 
set_key = 0x0E 
keyList = [0,0,0,0,0,0,0,0,0] 

for idx,com in enumerate(ComPorts): ## open up the COM ports 
    serList[idx] = serial.Serial(com,baud,timeout=stimeout) 

我想写一个共同的信息到所有的端口 - 失败：

for ser in serList: 
    SER_tx_command(ser,set_key,keyList) # send' 

但这个工作（少Python化）：

for idx in range(len(ComPorts)): 
    SER_tx_command(serList[idx],set_key,keyList) # send 

这是给错误在这个共同的功能：

def SER_tx_command(ser,cmd,payload): 
    length = len(payload)+4; 
    cksum = (0x01 + length + cmd)&0x00FF 
    msg = [0x01,length,cmd] 
    if (length > 4): 
     for val in payload: 
      cksum = (cksum+val)&0x00FF 
      msg.extend([val]) 
    msg.extend([cksum]) 
    for val in msg: 
     ser.write(chr(val)) ### ERROR HERE ### 

错误消息：

Traceback (most recent call last): 
    File "packet_test02.py", line 468, in <module> 
    update_key(key_jump) 
    File "packet_test02.py", line 149, in update_key 
    SER_tx_command(ser,set_key,keyList) # send the packet msg 
    File "packet_test02.py", line 28, in SER_tx_command 
    ser.write(chr(val)) 
    AttributeError: 'int' object has no attribute 'write' 

我怎样才能使通过串行端口对象循环迭代？
或者是不可能与python，我必须使用索引迭代器方法？

Answer 1

serList是dict不是list并遍历一个迭代dict的钥匙。在你的情况下，这些键是来自enumerate的整数索引。你可以重复它的值来代替（重命名变量，使其不易混淆）

for ser in serDict.values(): 
    SER_tx_command(ser, set_key, keyList) # send' 

或serList词典的钥匙使用list代替dict

ComPorts = ['com11','com13','com7','com19'] 
stimeout = 0.000120 ## 120 us character timeout 
baud = 115200 
set_key = 0x0E 
keyList = [0,0,0,0,0,0,0,0,0] 

serList = [serial.Serial(com,baud,timeout=stimeout) for com in ComPorts] ## 
for ser in serList: 
    SER_tx_command(ser, set_key, keyList) # send' 

Answer 2

for ser in serList: 

迭代的。在你的情况下，键是整数，而不是串行对象。

尝试：

for ser in serList: 
    SER_tx_command(serList[ser],set_key,keyList) # send'