CODEWITHSUNDEEP
pythoncompiler-errorsindentation
auden
auden

Reputation: 1157

Indentation error - python

I am unsure what is wrong with my code. I am trying to write a program that finds the prime factorization of a number, and iterates through numbers. My code is 

import math 
import time

def primfacfind(n1,n2):
    while n1 < n2:
        n = n1
        primfac=[]

        time_start = time.clock()

        def primes(n):
            sieve = [True] * n
            for i in xrange(3,int(n**0.5)+1,2):
                if sieve[i]:
                    sieve[i*i::2*i]=[False]*((n-i*i-1)/(2*i)+1)
            return [2] + [i for i in xrange(3,n,2) if sieve[i]]

        print primes(n)

        def factfind(lsp,n): #finds factors of n among primes
            for i in lsp:
                if n%i==0:
                    primfac.append(i)
                else:
                    i+=1

        factfind(primes(n),n)
        print primfac

        def simplify(lsp):
            for i in lsp:
                if lsp.count(i) > 1:
                    i+=1 #should simplify to 3^2 instead of 3,3; unfinished

        time_end = time.clock()
        time_elapsed = time_end - time_start
        print time_elapsed

        n1+=1

print primfacfind(6,15)

The error given is 

Traceback (most recent call last):
  File "python", line 15
    sieve = [True] * n
        ^
IndentationError: expected an indented block

I've checked over my indentation again and again, and I am unsure as to what is wrong. The program worked when it was not in the overall function and while loop, but I don't see how that should make a difference. It would be appreciated if the answer code was as simple as possible to understand, as I am somewhat new to python.

Any help with this error would be appreciated. Thanks!

Upvotes: 0

Views: 161

Answers (2)

Matz
Matz

Reputation: 371

Download something like Sublime and highlight the code. Spaces will be dots and tabs will be dashes.

Upvotes: 2

Megan
Megan

Reputation: 29

I put that code in my editor and it compiled just fine. So I went to line 12 where you have sieve = [True] * n and got rid of the indentation so it was indented the same as the line above it def primes(n): and I was able to recreate your error.

Perhaps try and add an additional indentation than you think. You can also try Enthought Canopy which is free if you go to a university if you want a different editor.

Upvotes: -1

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