我正在尝试在终端中使用test
运行一个名为python test
的简单脚本,以便调用另外两个脚本。
这是我正在运行的脚本
#!/usr/bin/env python
import sys
import rospy
import subprocess
import time
from geometry_msgs.msg import Twist
from std_msgs.msg import Empty
subprocess.call("./takeoff_sim")
time.sleep(2)
subprocess.call("./forward_sim" + sys.argv[5.0] + sys.argv[2.0])
但是我遇到了以下错误:
Traceback (most recent call last):
File "test", line 15, in <module>
subprocess.call(["./forward_sim"] + sys.argv[5.0] + sys.argv[2.0])
TypeError: list indices must be integers, not float
在这种情况下,两个参数都需要浮点数,因此,我不能仅将它们更改为int 0.5
应该是第一个参数,2.0
应该是第二个参数。这是forward_sim
脚本:
#!/usr/bin/env python
import sys
import rospy
from geometry_msgs.msg import Twist
def commander(speed, time):
movement_publisher = rospy.Publisher('cmd_vel', Twist , queue_size=10)
rospy.init_node("bebop_commander") #Use log_level=rospy.DEBUG to see debug messages
rate = rospy.Rate(20) # 20hz
counter = 0.0
movement_cmd = Twist()
while not rospy.is_shutdown():
movement_cmd.linear.x = speed
movement_cmd.linear.y = 0
movement_cmd.linear.z = 0
movement_cmd.angular.x = 0
movement_cmd.angular.y = 0
movement_cmd.angular.z = 0
rospy.logdebug("Publishing")
counter += 0.05
movement_publisher.publish(movement_cmd)
rate.sleep()
if counter >= time:
break
if __name__ == '__main__':
speed = float(sys.argv[0])
time = float(sys.argv[1])
rospy.logdebug("Adelante") # Use rospy.logdebug() for debug messages.
print("Adelante")
if speed > 0:
rospy.logdebug("Velocidad = %s m/s", speed)
print("Velocidad =",speed," m/s",)
else:
raise ValueError("Falta parametro de velocidad o el valor es incorrecto")
if time > 0 :
rospy.logdebug("Tiempo = %s s", time)
print("Tiempo =" ,time, " s")
else:
raise ValueError("Falta parametro de tiempo o el valor es incorrecto")
try:
commander(speed, time)
except rospy.ROSInterruptException:
pass
答案 0 :(得分:2)
sys.argv
仅用于接收参数。要将值作为参数传递给另一个脚本,只需将它们转换为字符串并将其直接添加到命令行即可。
subprocess.call(["./forward_sim", str(5.0), str(2.0)])
其他脚本收到它们时,需要将每个字符串转换回浮点数:
# This is forward_sim
arg1 = float(sys.argv[1])
arg2 = float(sys.argv[2])
请注意,sys.argv[0]
是脚本本身的名称,而不是第一个参数。