Increasing depth in python

[malling]

Hello everyone.

Im trying to make a smart way to using fractals and i have been searching a bit around without any advice on my topic.

Well it's basicly about applying One Rule.

It looks like this:

start F
rule F -> F L F R F L F

i got the main ideer of it that when it reads F it should write F L F R F L F and then add it to the "result".

My only problem is that im not the best programmer and therefore i don't know how i should proceed to write it into python.

it should read the list, then replace F with F L F R F L F ever time it finds it when it searching the list. In the end it should give a output where the whole result is printed.

list, tuples etc?

Best regards Malling

[Yoriz]

Please read through your post as if you where someone that didn't know what you are talking about as I don't understand how to offer help.

[malling]

Please read through your post as if you where someone that didn't know what you are talking about as I don't understand how to offer help.

sorry, i wanted to post a picture but it seems that i cant because of spam protecting.

Anyway i have found the solution, but i may post another thread soon. I do my best to explain it!

[malling]

Hello again forum!

I have a task that i have to solve, but there is a thing i don't understand.

I write the whole description down below so i don't confuse anyone!

Task
________________________________________________________
Write a function step(rules, state) that takes a list state, applies all rules in rules, and finally flattens the resulting list.
then write a function compute(depth, rules, start) that uses the step function depth times to transform the list start into a list representing a fractal of depth depth.

The step(rules, state) is confusing me. Can someone tell me how i define the rules in python?
I did Previously a function called apply(left, right, state) where i got this down.

def apply(left, right, state):
       result = []
       for x in state:
           if x==left:
               result.append(right)
           else:
               result.append(x)

       print(result)

apply("F",["F","L","F","R","F","L","F"],["F","R","F","R","F"])

but now where i only have the rule, i don't know how to proceed

Plz help me here!

Best regards Malling

[nilamo]

Do you know what the rules are?  Are they callable objects?  Strings representing things you do?  Could it be as simple as:

def step(rules, state):
    for rule in rules:
        state = rule(state)
    return state

[malling]

I actually have seen that before but wasn't sure.
But it confuses me how python knows what rule in rules are.
Could I also call it for x in rules? So it really doesn't matter?

[metulburr]

sorry, i wanted to post a picture but it seems that i cant because of spam protecting.

The link restrictions were given a little more leniency, if it was a link to pic.
http://python-forum.io/Thread-new-link-restriction

[nilamo]

Yes, it's just a temporary variable created by the for loop.  You can call it whatever you want...

>>> items = ['i', 'can', 'see', 'clearly', 'now']
>>> for thing in items:
...   print(thing)
...
i
can
see
clearly
now
>>> for x in items:
...   print(x)
...
i
can
see
clearly
now

[malling]

The files is something like this.
Rule: F -> F L F R F L F

[nilamo]

Is that one rule? What does it mean? Replace all "F" with "FLFRFLF"?