我正在嘗試用 python 制作一個基本的計算器。 我包括一個函數索引

Question

我還應該注意我使用的是 python 3.6。

funcs = [add,sub,mult,div,power]

以上是功能索引。

chosenfunc = chooseFunc()
for i in funcs:
    if i == chosenfunc:
        i(x,y)

以上就是我嘗試訪問它的方式。 所以它基本上運行add() 。 如果相關，我的 add 函數寫為：

def add(x,y):
    print(f"Result of {x} + {y}: {(float(x)) + (float(y))}")

我如何讓它運行我的功能？ 它目前沒有做任何事情。

import fractions

funcs = [add,sub,mult,div,power]

def chooseFunc():
    return input("Choose a function from between Add, Subtract, Multiply, Divide, power: ")

def numtofloat(num):
    return float(num)

def add(x,y):
    print(f"Result of {x} + {y}: {(numtofloat(x)) + (numtofloat(y))}")
def sub(x,y):
    print(f"Result of {x} - {y}: {(numtofloat(x)) - (numtofloat(y))}")
def mult(x,y):
    print(f"Result of {x} * {y}: {(numtofloat(x)) * (numtofloat(y))}")
def div(x,y):
    print(f"Result of {x} / {y}: {(numtofloat(x)) / (numtofloat(y))}")
def power(x,y):
    print(f"Result of {x} ^ {y}: {(numtofloat(x)) ^ (numtofloat(y))}")

chosenfunc = chooseFunc()
for i in funcs:
    if i == chosenfunc:
        i()

編輯以添加完整代碼。

Answer 1

這是您可以這樣做的方法...

def add(x, y):
    print(x + y)


funcs = [add, ]


def chooseFunc():
    # take input here for function by index or something
    return 0


chosenfunc = chooseFunc()

for i in range(len(funcs)):
    if i == chosenfunc:
        funcs[i](2, 3)

編輯：問題已更改:)

import fractions


def numtofloat(num):
    return float(num)


def add(x, y):
    print(f"Result of {x} + {y}: {(numtofloat(x)) + (numtofloat(y))}")


def sub(x, y):
    print(f"Result of {x} - {y}: {(numtofloat(x)) - (numtofloat(y))}")


def mult(x, y):
    print(f"Result of {x} * {y}: {(numtofloat(x)) * (numtofloat(y))}")


def div(x, y):
    print(f"Result of {x} / {y}: {(numtofloat(x)) / (numtofloat(y))}")


def power(x, y):
    print(f"Result of {x} ^ {y}: {(numtofloat(x)) ^ (numtofloat(y))}")


funcs = {"add": add, "sub": sub, "mult": mult, "div": div, "power": power}


def chooseFunc():
    return input("Choose a function from between add, sub, mult, div, power: ")


x, y = 2, 3

chosenfunc = chooseFunc()
for i in funcs.keys():
    if i == chosenfunc:
        funcs[i](x, y)

添加 x, y 以使用 dict 傳遞給函數以保持函數映射，還在映射之前移動函數 def