Python 将串行端口数据映射为整数
我打算通过串口从arduino检索字符串。如何将字符串映射为整数/浮点?下面是我当前使用Python的代码。我想要实现的是能够将第一个值作为数字读取Python 将串行端口数据映射为整数,python,dictionary,serial-port,Python,Dictionary,Serial Port,我打算通过串口从arduino检索字符串。如何将字符串映射为整数/浮点?下面是我当前使用Python的代码。我想要实现的是能够将第一个值作为数字读取 import serial ser = serial.Serial('COM7', 9600) try: result=ser.readline() pieces=result.split(" \t") map(float, pieces) print pieces if pieces[0] == 5.0:
import serial
ser = serial.Serial('COM7', 9600)
try:
result=ser.readline()
pieces=result.split(" \t")
map(float, pieces)
print pieces
if pieces[0] == 5.0:
print "Yes"
else:
print "No"
except:
print "Failed to get data from Arduino!"
结果:
[5.0, 23.2, 88.17]
['5', '23.20', '88.17\r\n']
No
您忘记将map分配给变量,或者在本例中是
片段
:
pieces = map(float, pieces) #assign the floated list to the variable 'pieces'
除了使用地图,还有另一种选择:)
好吧,这里有一个替代方案:
#List comprehension:
pieces = [float(i) for i in pieces]
看起来也一样不错,对吧
简而言之,您的代码应该是这样的:
import serial
ser = serial.Serial('COM7', 9600)
try:
result=ser.readline()
pieces=result.split(" \t")
pieces = map(float, pieces)
print pieces
if pieces[0] == 5.0:
print "Yes"
else:
print "No"
except:
print "Failed to get data from Arduino!"
希望这有帮助