Python：类型错误：只能将str(不是"int")连接到str：变量存储错误

Question

Hi需要澄清存储为错误值的python变量，这里是代码：

userinput1 = int(input('enter start valuen'))
userinput2 = int(input('enter stop valuen'))
userinput3 = int(input('enter rampup time in secondsn'))
userinput4 = float(input('enter  increments delta n'))
userinput5 = input('Enter sequence channels: A A A A or D D D D - A Ascend, D Descent , E Exclude n')
command1 = "RAMP " + str(userinput5) + " " + userinput1 + " " + userinput2 + " " + userinput4 + " " + userinput3
port.write(command1.encode())

#### ERROR #####
command1 = str("RAMP " + str(userinput5) + " " + userinput1 + " " + userinput2 + " " + userinput4 + " " + userinput3)
TypeError: can only concatenate str (not "int") to str

你能澄清一下在单变量命令中存储两种类型变量输入的正确方法吗。种姓制度已经过时了。

Answer 1

您只能连接字符串，因此在连接所有用户输入之前，您必须"转换"；将它们转换成字符串

示例1:

command1 = "RAMP " + " ".join(map(str, [userinput5, userinput1, userinput2, userinput4, userinput3]))

示例2:

command1 = f"RAMP {userinput5} {userinput1} {userinput2} {userinput4} {userinput3}"