我写了一个温度转换程序。除了将开尔文转换为摄氏温度，将开尔文转换为华氏度，反之亦然之外，其他所有方法都运行良好。我尝试了很多不同的代码来查看它是否可以解决，但徒劳无功。请指教。以下是整个代码。您将在名为ToTemp（）的第二个函数中找到问题所在。如果您输入的是上限温度下限的缩写或上限（即34F或34f），则前两句话效果很好。但是其他任何事情都无法解决。
'''
Python program to convert temperature from Celsius,
Fahrenheit or Kelvin. These next lines of code (loc) introduce
the program and ask user for temperature to be converted.
'''
import sys # to exit when user makes error.
print ("\n****Welcome to your own advanced temperature conversion application!****\n")
print ("^^^What would you like to convert?^^^")
print ("Type 'C' for Celsius, 'F' for Fahrenheit and 'K' for Kelvin \
after entering digits. (Ex: '34C')\n")
user_temp1 = input('--> ')
# function to determine which temperature user wishes to convert from.
def FromTemp(user_temp):
if user_temp1[-1] == 'C' or user_temp1[-1] == 'c':
print ("You wish to convert from Celsius.")
elif user_temp1[-1] == 'F' or user_temp1[-1] == 'f':
print ("You wish to convert from Fahrenheit.")
elif user_temp1[-1] == 'K' or user_temp1[-1] == 'k':
print ("Ah! Yes, the elusive Kelvin!")
else:
print ("You must think me mad; I only allow C, F and K.")
sys.exit() # exits when user makes mistake.
FromTemp(user_temp1)
# asks user for desired conversion rate.
print ("\n^^^What would you like to convert to? (Enter 'C', 'F' or 'K')^^^\n")
destin_temp = input("--> ")
# stripping the numbers from the temperature symbol.
real_temp = user_temp1[:- 1]
raw_temp = int(real_temp)
# function to make conversion from and to appropriate thermal unit.
def ToTemp(raw_temp):
if destin_temp == 'C' or destin_temp == 'c' and user_temp1[-1] == 'F' or user_temp1[-1] == 'f':
f_to_c = round(float((raw_temp - 32) * 5/9), 2)
print (real_temp, "degrees Fahrenheit is", f_to_c, "degrees Celsius.\n")
print ("****Thank you for stopping by!****\n") #good
elif destin_temp == 'F' or destin_temp == 'f' and user_temp1[-1] == 'C' or user_temp1[-1] == 'c':
c_to_f = round(float(raw_temp * (9/5) + 32), 2)
print (real_temp, "degrees Celsius is", c_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") #good
elif destin_temp == 'C' or destin_temp == 'c' and user_temp1[-1] == 'K' or user_temp1[-1] == 'k':
k_to_c = round(float(raw_temp - 273.15), 2)
print (real_temp, "degrees Kelvin is", k_to_c, "degrees Celsius.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp == 'K' or destin_temp == 'k' and user_temp1[-1] == 'C' or user_temp1[-1] == 'c':
c_to_k = round(float(raw_temp + 273.15), 2)
print (real_temp, "degrees Celsius is", c_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp == 'F' or destin_temp == 'f' and user_temp1[-1] == 'K' or user_temp1[-1] == 'k':
k_to_f = round(float((raw_temp - 273.15) * (9/5) + 32), 2)
print (real_temp, "degrees Kelvin is", k_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp == 'K' or destin_temp == 'k' and user_temp1[-1] == 'F' or user_temp1[-1] == 'f':
f_to_k = round(float(raw_temp - 32 *(5/9) + 273.15), 2)
print (real_temp, "degrees Fahrenheit is", k_to_f, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
else:
print("You made a mistake somewhere. Try again later.")
sys.exit()
ToTemp(raw_temp)
答案 0 :(得分：3)
我宁愿改写这个：
if destin_temp == 'C' or destin_temp == 'c' and user_temp1[-1] == 'F' or user_temp1[-1] == 'f':
是这样的：
destin_temp = destin_temp.lower()
user_temp = user_temp1[-1].lower()
if destin_temp == 'c' and user_temp == 'f':
将所有内容转换为小写（或大写）并处理更简单的表达式。
答案 1 :(得分：2)
将华氏温度转换为开氏温度时会出错，因为在最后一个elif中，您计算了f_to_k，但打印了k_to_f。您的错误来自代码的这一部分。另外，最好使用括号来明确条件。这是最终代码。
'''
Python program to convert temperature from Celsius,
Fahrenheit or Kelvin. These next lines of code (loc) introduce
the program and ask user for temperature to be converted.
'''
import sys # to exit when user makes error.
print ("\n****Welcome to your own advanced temperature conversion application!****\n")
print ("^^^What would you like to convert?^^^")
print ("Type 'C' for Celsius, 'F' for Fahrenheit and 'K' for Kelvin \
after entering digits. (Ex: '34C')\n")
user_temp1 = input('--> ')
# function to determine which temperature user wishes to convert from.
def FromTemp(user_temp):
if user_temp1[-1] == 'C' or user_temp1[-1] == 'c':
print ("You wish to convert from Celsius.")
elif user_temp1[-1] == 'F' or user_temp1[-1] == 'f':
print ("You wish to convert from Fahrenheit.")
elif user_temp1[-1] == 'K' or user_temp1[-1] == 'k':
print ("Ah! Yes, the elusive Kelvin!")
else:
print ("You must think me mad; I only allow C, F and K.")
sys.exit() # exits when user makes mistake.
FromTemp(user_temp1)
# asks user for desired conversion rate.
print ("\n^^^What would you like to convert to? (Enter 'C', 'F' or 'K')^^^\n")
destin_temp = input("--> ")
# stripping the numbers from the temperature symbol.
real_temp = user_temp1[:- 1]
raw_temp = int(real_temp)
# function to make conversion from and to appropriate thermal unit.
def ToTemp(raw_temp):
if (destin_temp == 'C' or destin_temp == 'c') and (user_temp1[-1] == 'F' or user_temp1[-1] == 'f'):
f_to_c = round(float((raw_temp - 32) * 5/9), 2)
print (real_temp, "degrees Fahrenheit is", f_to_c, "degrees Celsius.\n")
print ("****Thank you for stopping by!****\n") #good
elif (destin_temp == 'F' or destin_temp == 'f') and (user_temp1[-1] == 'C' or user_temp1[-1] == 'c'):
c_to_f = round(float(raw_temp * (9/5) + 32), 2)
print (real_temp, "degrees Celsius is", c_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") #good
elif (destin_temp == 'C' or destin_temp == 'c') and (user_temp1[-1] == 'K' or user_temp1[-1] == 'k'):
k_to_c = round(float(raw_temp - 273.15), 2)
print (real_temp, "degrees Kelvin is", k_to_c, "degrees Celsius.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif (destin_temp == 'K' or destin_temp == 'k') and (user_temp1[-1] == 'C' or user_temp1[-1] == 'c'):
c_to_k = round(float(raw_temp + 273.15), 2)
print (real_temp, "degrees Celsius is", c_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif (destin_temp == 'F' or destin_temp == 'f') and (user_temp1[-1] == 'K' or user_temp1[-1] == 'k'):
k_to_f = round(float((raw_temp - 273.15) * (9/5) + 32), 2)
print (real_temp, "degrees Kelvin is", k_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif (destin_temp == 'K' or destin_temp == 'k') and (user_temp1[-1] == 'F' or user_temp1[-1] == 'f'):
f_to_k = round(float(raw_temp - 32 *(5/9) + 273.15), 2)
print (real_temp, "degrees Fahrenheit is", f_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
else:
print("You made a mistake somewhere. Try again later.")
sys.exit()
ToTemp(raw_temp)
更新：这是井井有条的代码。
'''
Python program to convert temperature from Celsius,
Fahrenheit or Kelvin. These next lines of code (loc) introduce
the program and ask user for temperature to be converted.
'''
import sys # to exit when user makes error.
# function to determine which temperature user wishes to convert from.
def FromTemp(user_temp):
if user_temp1[-1] == 'C' or user_temp1[-1] == 'c':
print ("You wish to convert from Celsius.")
elif user_temp1[-1] == 'F' or user_temp1[-1] == 'f':
print ("You wish to convert from Fahrenheit.")
elif user_temp1[-1] == 'K' or user_temp1[-1] == 'k':
print ("Ah! Yes, the elusive Kelvin!")
else:
print ("You must think me mad; I only allow C, F and K.")
sys.exit() # exits when user makes mistake.
# function to make conversion from and to appropriate thermal unit.
def ToTemp(raw_temp):
if destin_temp.lower() == 'c' and user_temp1[-1].lower() == 'f':
f_to_c = round(float((raw_temp - 32) * 5/9), 2)
print (real_temp, "degrees Fahrenheit is", f_to_c, "degrees Celsius.\n")
print ("****Thank you for stopping by!****\n") #good
elif destin_temp.lower() == 'f' and user_temp1[-1].lower() == 'c':
c_to_f = round(float(raw_temp * (9/5) + 32), 2)
print (real_temp, "degrees Celsius is", c_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") #good
elif destin_temp.lower() == 'c' and user_temp1[-1].lower() == 'k':
k_to_c = round(float(raw_temp - 273.15), 2)
print (real_temp, "degrees Kelvin is", k_to_c, "degrees Celsius.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp.lower() == 'k' and user_temp1[-1].lower() == 'c':
c_to_k = round(float(raw_temp + 273.15), 2)
print (real_temp, "degrees Celsius is", c_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp.lower() == 'f' and user_temp1[-1].lower() == 'k':
k_to_f = round(float((raw_temp - 273.15) * (9/5) + 32), 2)
print (real_temp, "degrees Kelvin is", k_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp.lower() == 'k' and user_temp1[-1].lower() == 'f':
f_to_k = round(float(raw_temp - 32 *(5/9) + 273.15), 2)
print (real_temp, "degrees Fahrenheit is", f_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
else:
print("You made a mistake somewhere. Try again later.")
sys.exit()
if __name__ == "__main__":
print ("\n****Welcome to your own advanced temperature conversion application!****\n")
print ("^^^What would you like to convert?^^^")
print ("Type 'C' for Celsius, 'F' for Fahrenheit and 'K' for Kelvin \
after entering digits. (Ex: '34C')\n")
user_temp1 = input('--> ')
FromTemp(user_temp1)
# asks user for desired conversion rate.
print ("\n^^^What would you like to convert to? (Enter 'C', 'F' or 'K')^^^\n")
destin_temp = input("--> ")
# stripping the numbers from the temperature symbol.
real_temp = user_temp1[:- 1]
raw_temp = int(real_temp)
ToTemp(raw_temp)
答案 2 :(得分：1)
Python不会以您认为的方式解释您和/或陈述。
您正在考虑将其视为（1或2）和（3或4）：
但是python并没有那样的感觉。它正在读取1或（2和3）或4：
通过使用.upper（）命令压缩代码来清除代码，即可解决您的问题。
'''
Python program to convert temperature from Celsius,
Fahrenheit or Kelvin. These next lines of code (loc) introduce
the program and ask user for temperature to be converted.
'''
import sys # to exit when user makes error.
print ("\n****Welcome to your own advanced temperature conversion application!****\n")
print ("^^^What would you like to convert?^^^")
print ("Type 'C' for Celsius, 'F' for Fahrenheit and 'K' for Kelvin \
after entering digits. (Ex: '34C')\n")
user_temp1 = input('--> ')
# function to determine which temperature user wishes to convert from.
def FromTemp(user_temp):
if user_temp1[-1].upper() == 'C':
print ("You wish to convert from Celsius.")
elif user_temp1[-1].upper() == 'F':
print ("You wish to convert from Fahrenheit.")
elif user_temp1[-1].upper() == 'K':
print ("Ah! Yes, the elusive Kelvin!")
else:
print ("You must think me mad; I only allow C, F and K.")
sys.exit() # exits when user makes mistake.
FromTemp(user_temp1)
# asks user for desired conversion rate.
print ("\n^^^What would you like to convert to? (Enter 'C', 'F' or 'K')^^^\n")
destin_temp = input("--> ")
# stripping the numbers from the temperature symbol.
real_temp = user_temp1[:- 1]
raw_temp = int(real_temp)
# function to make conversion from and to appropriate thermal unit.
def ToTemp(raw_temp):
if destin_temp.upper() == 'C' and user_temp1[-1].upper() == 'F':
f_to_c = round(float((raw_temp - 32) * 5/9), 2)
print (real_temp, "degrees Fahrenheit is", f_to_c, "degrees Celsius.\n")
print ("****Thank you for stopping by!****\n") #good
elif destin_temp.upper() == 'F' and user_temp1[-1].upper() == 'C':
c_to_f = round(float(raw_temp * (9/5) + 32), 2)
print (real_temp, "degrees Celsius is", c_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") #good
elif destin_temp.upper() == 'C' and user_temp1[-1].upper() == 'K':
k_to_c = round(float(raw_temp - 273.15), 2)
print (real_temp, "degrees Kelvin is", k_to_c, "degrees Celsius.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp.upper() == 'K' and user_temp1[-1].upper() == 'C':
c_to_k = round(float(raw_temp + 273.15), 2)
print (real_temp, "degrees Celsius is", c_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp.upper() == 'F' and user_temp1[-1].upper() == 'K':
k_to_f = round(float((raw_temp - 273.15) * (9/5) + 32), 2)
print (real_temp, "degrees Kelvin is", k_to_f, "degrees Fahrenheit.")
print ("****Thank you for stopping by!****\n") # doesn't work
elif destin_temp.upper() == 'K' and user_temp1[-1].upper() == 'F':
f_to_k = round(float(raw_temp - 32 *(5/9) + 273.15), 2)
print (real_temp, "degrees Fahrenheit is", f_to_k, "degrees Kelvin.")
print ("****Thank you for stopping by!****\n") # doesn't work
else:
print("You made a mistake somewhere. Try again later.")
sys.exit()