从模块调用方法

Question

我是 python 的新手，在使用我的代码时遇到问题。

我有两个不同的模块，在模块 a.py 中，我放入了所有方法，在模块 b.py 中，我放入了逻辑。

我使用的开发环境是Sypder

# module a
import serial
ser = serial.Serial()
def serWrite ( str ):
    ser.write (str + "\x0D")
    print "Write data :",  str + "\x0D"  
    time.sleep(0.1)
    return

def configuration():
    flagAT = 0
    while (flagAT == 0):
        serWrite("at")
        while True:
            ok = ser.readline()
            if (ok[0:2] == "OK"):
                print ("AT OK, DEVICE CONNECTED" + "\x0D")
                flagAT = 1
                break
            else:
                   print "DEVICE NOT CONNECTED OR NOT WORKING"

                   break
    print("Starting with configuration")

模块b.py：

#module b
import serial
import a

ser = serial.Serial()
ser.port = "/dev/ttyS1"
ser.baudrate = 115200
### more serial configuration here###

try: 
    ser.open()
except Exception, e:
    print "error open serial port: " + str(e)
    exit()

configuration()

现在进入正题：当我运行模块 b.py AFTER 运行ning a.py INSIDE Spyder 一切都按预期工作。

但是：Spyder 代码分析告诉我

'a' imported but unused

当我尝试调用模块 b.py OUTSIDE Spyder 时出现以下错误

pi@(none) ~/WorkingDirectory $ python b.py
Traceback (most recent call last):
File "b.py", line 83, in <module>
configuration()
NameError: name 'configuration' is not defined

正在导入配置()：

import a
a.configuration()

给出以下错误：

Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "/usr/lib/python2.7/dist-packages/spyderlib/widgets/externalshell/sitecustomize.py", line 540, in runfile
 execfile(filename, namespace)
 File "/home/workingDirectory/test.py", line 85,     in    <module>
a.configuration()
File "a.py", line 336, in configuration
serWrite("at")
File "a.py", line 16, in serWrite
ser.write (str + "\x0D")
File "build/bdist.linux-i686/egg/serial/serialposix.py", line 490, in write
serial.serialutil.SerialException: Attempting to use a port that is not open

我不明白为什么我的程序运行在 spyder 中没有问题，但在外部却没有。有人可以帮忙吗？

Answer 1

您需要将模块 b 更改为：

#module b
import serial
from a import ser, configuration

#ser = serial.Serial()
ser.port = "/dev/ttyS1"
ser.baudrate = 115200
### more serial configuration here###

try: 
    ser.open()
except Exception, e:
    print "error open serial port: " + str(e)
    exit()

configuration()

从模块调用方法

Calling method from module

python

methods

import

serial-port

spyder