如何从for循环创建列表

Question

I am trying to create a list of numbers from a function and a for-loop. Here is a copy of my code:

Rh = 1096776000000

print "What is your value for 'n'?"
n = float(raw_input(">"))

m = range(int(n+1), int(n+21))

def wavelength(a,b):
    list = [((1 / (Rh * ((1 / (a**2)) - (1 / (float(x)**2))))) * 10 ** 14)
    for x in b]
    return list


for elements in wavelength(n,m):
    print "%.3f" % elements, 'nm'

This will print out what I want, but I need to take all of the data points and put them into a list. Any ideas?

Answer 1

I guess you're in need of something like this:

l = [] # An empty list
for elements in wavelength(n,m):
    l.append("%.3f" % elements, 'nm') # Adding rounded values to the list
print l # Print the full list 

Answer 2

results = ["%.3f nm" % elements for elements in wavelength(n,m)]