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# -*- coding: utf-8 -*- 

import random 

from captcha.conf import settings 

import django 

5 ↛ 6line 5 didn't jump to line 6, because the condition on line 5 was never trueif django.VERSION < (1, 10): # NOQA 

from django.core.urlresolvers import reverse # NOQA 

else: # NOQA 

from django.urls import reverse # NOQA 

from six import u, text_type 

 

 

def math_challenge(): 

operators = ('+', '*', '-',) 

operands = (random.randint(1, 10), random.randint(1, 10)) 

operator = random.choice(operators) 

if operands[0] < operands[1] and '-' == operator: 

operands = (operands[1], operands[0]) 

challenge = '%d%s%d' % (operands[0], operator, operands[1]) 

return '{}='.format( 

challenge.replace('*', settings.CAPTCHA_MATH_CHALLENGE_OPERATOR) 

), text_type(eval(challenge)) 

 

 

def random_char_challenge(): 

chars, ret = u('abcdefghijklmnopqrstuvwxyz'), u('') 

for i in range(settings.CAPTCHA_LENGTH): 

ret += random.choice(chars) 

return ret.upper(), ret 

 

 

def unicode_challenge(): 

chars, ret = u('äàáëéèïíîöóòüúù'), u('') 

for i in range(settings.CAPTCHA_LENGTH): 

ret += random.choice(chars) 

return ret.upper(), ret 

 

 

def word_challenge(): 

fd = open(settings.CAPTCHA_WORDS_DICTIONARY, 'rb') 

l = fd.readlines() 

fd.close() 

while True: 

word = random.choice(l).strip() 

44 ↛ 43line 44 didn't jump to line 43, because the condition on line 44 was never false if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH: 

break 

return word.upper(), word.lower() 

 

 

def huge_words_and_punctuation_challenge(): 

"Yay, undocumneted. Mostly used to test Issue 39 - http://code.google.com/p/django-simple-captcha/issues/detail?id=39" 

fd = open(settings.CAPTCHA_WORDS_DICTIONARY, 'rb') 

l = fd.readlines() 

fd.close() 

word = '' 

while True: 

word1 = random.choice(l).strip() 

word2 = random.choice(l).strip() 

punct = random.choice(settings.CAPTCHA_PUNCTUATION) 

word = '%s%s%s' % (word1, punct, word2) 

60 ↛ 56line 60 didn't jump to line 56, because the condition on line 60 was never false if len(word) >= settings.CAPTCHA_DICTIONARY_MIN_LENGTH and len(word) <= settings.CAPTCHA_DICTIONARY_MAX_LENGTH: 

break 

return word.upper(), word.lower() 

 

 

def noise_arcs(draw, image): 

size = image.size 

draw.arc([-20, -20, size[0], 20], 0, 295, fill=settings.CAPTCHA_FOREGROUND_COLOR) 

draw.line([-20, 20, size[0] + 20, size[1] - 20], fill=settings.CAPTCHA_FOREGROUND_COLOR) 

draw.line([-20, 0, size[0] + 20, size[1]], fill=settings.CAPTCHA_FOREGROUND_COLOR) 

return draw 

 

 

def noise_dots(draw, image): 

size = image.size 

for p in range(int(size[0] * size[1] * 0.1)): 

draw.point((random.randint(0, size[0]), random.randint(0, size[1])), fill=settings.CAPTCHA_FOREGROUND_COLOR) 

return draw 

 

 

def noise_null(draw, image): 

return draw 

 

 

def post_smooth(image): 

from PIL import ImageFilter 

return image.filter(ImageFilter.SMOOTH) 

 

 

def captcha_image_url(key): 

"""Return url to image. Need for ajax refresh and, etc""" 

return reverse('captcha-image', args=[key])