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你好我的代碼有問題。我想從我的udoo爲我的ecg繪製一個實時信號。 buat當我將它連接得到了下面的序列:Python:AttributeError:'Serial'對象沒有用於實時數據的屬性'is_open'
Traceback (most recent call last):
File "plot_serial.py", line 10, in <module>
if userial.is_open:
AttributeError: 'Serial' object has no attribute 'is_open'
這裏是我的代碼:
import serial
import time
import matplotlib.pyplot as plt
import numpy as np
ubaudrate = 9600
uport = '/dev/ttyMCC' # set the correct port before run it
userial = serial.Serial(uport, ubaudrate, timeout=1)
userial.timeout = 10
if userial.is_open:
while True:
size = userial.inWaiting()
if size:
data = userial.read(size)
plt.figure
plt.plot(size, data, 'b', alpha=0.75)
plt.legend(('Sinyal Jantung'), loc='best')
plt.grid(True)
plt.show()
#print data
else:
print ('no data')
time.sleep(1)
else:
print ('serial not open')
# z1serial.close() # close z1serial if z1serial is open.
感謝您的幫助之前,因爲我是新手在Python編程
謝謝,但我得到這樣 '文件「/usr/lib/pymodules/python2.7/matplotlib/lines.py」另一個錯誤,第743行,在get_path中 self.recache() 文件「/usr/lib/pymodules/python2.7/matplotlib/lines.py」,第429行,在recache中 y = np.asarray(yconv,np.float_) 文件「/usr/lib/python2.7/dist-packages/numpy/core/numeric.py」,行460,asarray 返回數組(a,dtype,copy = False,order = order) ValueError:無效字面值爲float():336'你知道如何解決它嗎? –
查看我的更新回答。 –