如何在Python中调试我的if和elif语句？

Question

# Kinematics clculator 

print('Kinematics Calculator') 

print('If either one of the three values(s,v,t) is not given then put its value = 1') 


s = float(input('Enter your distance = ')) 
print(s) 


t = float(input('Enter your time = ')) 
print(t) 


v = float(input('Enter your velocity = ')) 
print(v) 


if 'v == 1' : 
    print('velocity = '+ str(s/t)) 

elif 't == 1' : 
    print('time = '+ str(s/v)) 

else : 
    's == 1' 
print('distance = '+ str(v*t)) 

帮我改正这段代码。每当我尝试计算什么比别的“速度”它总是使用第一个打印命令即

print('velocity = '+ str(s/t)) 

Answer 1

'v == 1'结果始终为true，因为它是一个非空字符串。你应该使用

if v == 1: 
    print('velocity = '+ str(s/t)) 

elif t == 1: 
    print('time = '+ str(s/v)) 

else: 
    print('distance = '+ str(v*t))