使用 for 循环遍历变量

Question

I'm fairly new to coding. I'm trying to iterate the variable k through my function and store the results in a list. k starts with k=1 and ends with k=40. But something isnt working. My list only contains 0s. Hopefully you can help me

Here is a Screenshot of my code

Here is another attempt

Tn = []
for k in range(1, 40):
    x = ((40+0.2) / ((k-0.4))* (17/40))
    Tn.append(x)
    
print Tn

Answer 1

Your k variable is a range object, not an index.

Try putting your variable inside a list, and then iterate through that list. You don't even have to use the range object to iterate through a list :

lst = [10, 20, 30, 40]

for item in lst:
    print(item) # print item if you use Python 2

And if you want to use an index :

for index in range(len(lst)):
    print(lst[index]) # print lst[index] if you use Python 2

If you want to use variables :

a = 10
b = 20
c = 30
d = 40
lst = [a, b, c, d]

for item in lst:
    print(item) # print item if you use Python 2

Side note : you seem to be using Python 2. I would highly recommend you use Python 3.x (the latest the version the better). The transition is not difficult at all, and even easier if you're new to coding. Python 3.x has way more to offer than Python 2 and you will quickly see its limitations.