Adding the results of multiple functions - function

Question

Using python 3.3
Stumbled upon another problem with my program. Its the same solar program. Again i decided to add more functionality. Its basically ad-hoc. I'm adding things as i go along. I realize it can be made more efficient but once i decide its done, I'll post the whole coding up.
Anyway, i need to add the results from multiple functions. Here's a part of my coding:
def janCalc():
for a in angle(0,360,10): #angle of orientation
for d in days(1,32,1.0006630137): #day number of year
for smodule in equation(): #equation() function not shown in this coding
total_jan+=smodule #total_jan is already defined elsewhere
avg_jan=total_jan/(60*(1.0006630137*31))
ratio_jan=avg_jan/5.67
calcJan=(ratio_jan*4.79)
yield calcJan
total_jan=0 #necessary to reset total to 0 for next angle interval
def febCalc():
for a in angle(0,360,10):
for d in days ((1.0006630137*31),61,1.0006630137):
for smodule in equation():
total_feb+=smodule
avg_feb=total_feb/(60*(1.0006630137*28))
ratio_feb=avg_feb/6.56
calcFeb=(ratio_feb*4.96)
yield calcFeb
total_feb=0
#etc..............
Is there anyway to add the yield of each function?
for e.g: calcJan+calcFeb+.....
I would like to get the total results under each angle interval and then dividing by 12 to get the average value per interval. Like so:-
0 degrees---->total/12
10 deg ---->total/12
20 deg ---->total/12
30 deg ---->total/12
........
360 deg ---->total/12
If you need more info, let me know.
ADDENDUM
The solution was essentially solved by #jonrsharpe. But i encountered a bit of a problem.
Traceback (most recent call last):
File "C:\Users\User\Documents\Python\Solar program final.py", line 247, in <module>
output=[sum(vals)/12 for vals in zip(*(gen() for gen in months))]
File "C:\Users\User\Documents\Python\Solar program final.py", line 247, in <listcomp>
output=[sum(vals)/12 for vals in zip(*(gen() for gen in months))]
File "C:\Users\User\Documents\Python\Solar program final.py", line 103, in janCalc
for smodule in equation():
File "C:\Users\User\Documents\Python\Solar program final.py", line 63, in equation
d=math.asin(math.sin(math.radians(23.45))*math.sin(math.radians((360/365.242)*(d-81))))
NameError: global name 'd' is not defined
I've isolated it to:
for d in days ((1.0006630137*31),61,1.0006630137):
for smodule in equation():
It turns out i can't reference a function from inside a function? I'm not too sure. So even my original coding did not work. I assumed it was working because previously i had not defined each month as a function. I should have tested it out first.
Do you know how to get around this?

Answer 1

A simple example to demonstrate how to combine multiple generators:
>>> def gen1():
for x in range(5):
yield x
>>> def gen2():
for x in range(5, 10):
yield x
>>> [sum(vals) for vals in zip(*(gen() for gen in (gen1, gen2)))]
[5, 7, 9, 11, 13]
Or, written out long hand:
output = list(gen1())
for index, value in enumerate(gen2()):
output[index] += value
You can modify either version to include a division, too, so your case would look something like:
months = [janCalc, fabCalc, ...]
output = [sum(vals) / 12 for vals i zip(*(gen() for gen in months))]