这个自定义计算器的Python代码现在可以正常工作了，我把它弄坏了，无法弄清楚哪里出了问题

Question

I had this working and now I cannot figure out what I did to make it not function the way I intend it to. When the program is called by the pyshell it asks the questions as it is supposed to but when the reply is given this is where it loses it mind. It was working and would call the function I have defined but now it will not do so.

I might just redefine the responses to use numbers instead of strings to make it easier and faster to complete the entries, but at the moment it is not working so there is no point in doing that until I can get it figured out.

The error is in the run_time() section, it is not calling the function as it should be, I might be missing something. I want it to call the function when the proper response is given.

I did try:

k = (query())
f = function_list[k]
f()

This did not worth either, so I am stuck. I appreciate any help.

def f_to_c():
    temp = int(input("How warm is it out?"))
    f_or_c = str(input("Is it C or F?"))
    if f_or_c == 'c' or f_or_c == 'C':
        updatedtemp = float(temp * 9 / 5 + 32)
        print (updatedtemp, 'F')
    elif f_or_c == 'f' or f_or_c == 'F':
        updatedtemp = float((temp - 32) * 5 / 9)
        print (updatedtemp, 'C')

def calc_trapezoid_area():
    height = float(Input('What is the height of the trapezoid?'))
    length1 = float(Input('What is the length of the bottom base?'))
    length2 = float(Input('What is the length of the top base?'))
    formula = float((1 / 2 * (length1 + length2)) * height)
    print ("The area of the trapezoid is:", (formula))

def cal_circle():
    pi = float(245850922 / 78256779)
    rad_or_diam = str(input('Diameter or Radius?'))
    width = float(input('What is the %s of your Circle?' % rad_or_diam))
    if rad_or_diam == 'r' or rad_or_diam == 'R':
        print (float(pi * width ** 2))
    elif rad_or_diam == 'd' or rad_or_diam == 'D':
        print (float(pi * width))

def query():
    query = str(input('What would you like to calculate? Degrees, Trapezoids, or Circles?')).lower

function_list = {
    "degrees": f_to_c,
    "trapezoids": calc_trapezoid_area,
    "circles": cal_circle
    }

def run_time():
    try:
        f = function_list[query()]
        f()
    except KeyError:
        print ("You messed up!")

if __name__ == '__main__':
    while True:
        run_time()
        x = str(input('True or False?'))
        if x == 'True':
            break

Answer 1

There are two problems with your query function:

1. It doesn't return anything; and
2. It doesn't call lower .

Instead, try:

def query():
    prompt = 'What would you like to calculate? Degrees, Trapezoids, or Circles?'
    return input(prompt).lower()

Note the following:

• input already returns a string, no need to call str() ;
• You need to explicitly return the value; and
• Parentheses () are required to actually call lower , otherwise you return the method itself.

Also, in f_to_c , "flaot" != "float" .

Finally, you could improve your run_time function, minimising the amount of code in the try block:

try:
    f = function_list[query()]
except KeyError:
    print ("You messed up!")
else:
    f()

This prevents a KeyError from f() being accidentally silenced.