Anti Earth - 9 months ago 37

Python Question

My problem is difficult to explain.

I want to create a function that contains nested for loops,

the amount of which is proportional to an argument passed to the function.

Here's a hypothetical example:

`Function(2)`

...would involve...

`for x in range (y):`

for x in range (y):

do_whatever()

Another example...

`Function(6)`

...would involve...

`for x in range (y):`

for x in range (y):

for x in range (y):

for x in range (y):

for x in range (y):

for x in range (y):

whatever()

The variables of the for loop (y) are NOT actually used in the nested code.

Your first thought might be to create ONE for loop, with a range that is to the power of the number argument...

THIS CAN NOT WORK because the product would be HUGE. I have instances required where there are 8 nested for loops.

The product is too large for a range in a for loop.

There are other arguments needed to be passed to the function, but I can handle that myself.

Here's the code

(it creates the Snowflake Fractal)

`from turtle import *`

length = 800

speed(0)

def Mini(length):

for x in range (3):

forward(length)

right(60)

penup()

setpos(-500, 0)

pendown()

choice = input("Enter Complexity:")

if choice == 1:

for x in range (3):

forward(length)

left(120)

elif choice == 2:

for x in range (3):

Mini(length/3)

left(120)

if choice == 3:

for x in range (6):

Mini(length/9)

right(60)

Mini(length/9)

left(120)

if choice == 4:

for y in range (6):

for x in range (2):

Mini(length/27)

right(60)

Mini(length/27)

left(120)

right(180)

for x in range (2):

Mini(length/27)

right(60)

Mini(length/27)

left(120)

if choice == 5:

for a in range (6):

for z in range (2):

for y in range (2):

for x in range (2):

Mini(length/81)

right(60)

Mini(length/81)

left(120)

right(180)

for x in range (2):

Mini(length/81)

right(60)

Mini(length/81)

left(120)

right(180)

right(180)

if choice == 6:

for c in range (6):

for b in range (2):

for a in range (2):

for z in range (2):

for y in range (2):

for x in range (2):

Mini(length/243)

right(60)

Mini(length/243)

left(120)

right(180)

for x in range (2):

Mini(length/243)

right(60)

Mini(length/243)

left(120)

right(180)

right(180)

right(180)

right(180)

if choice == 7:

for a in range (6):

for b in range(2):

for c in range (2):

for d in range (2):

for e in range (2):

for f in range (2):

for y in range (2):

for x in range (2):

Mini(length/729)

right(60)

Mini(length/729)

left(120)

right(180)

for x in range (2):

Mini(length/729)

right(60)

Mini(length/729)

left(120)

right(180)

right(180)

right(180)

right(180)

right(180)

right(180)

I'd appreciate any help you can give me at all,

though if you suggest a different method (such as recursion),

please don't just paste the code; instead, suggests some ideas that could put me in the right direction.

(The algorithm is for a Specialist Math Assignment)

specs:

Python 2.7.1

Turtle

IDLE

Windows7

Answer

This problem can be solved by recursion. I am just writing an algorithm here, since I believe this can be a general problem.

```
function Recurse (y, number)
if (number > 1)
Recurse ( y, number - 1 )
else
for x in range (y)
whatever()
```

Source (Stackoverflow)