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import os 

from django.conf import settings 

 

CAPTCHA_FONT_PATH = getattr(settings, 'CAPTCHA_FONT_PATH', os.path.normpath(os.path.join(os.path.dirname(__file__), '..', 'fonts/Vera.ttf'))) 

CAPTCHA_FONT_SIZE = getattr(settings, 'CAPTCHA_FONT_SIZE', 22) 

CAPTCHA_LETTER_ROTATION = getattr(settings, 'CAPTCHA_LETTER_ROTATION', (-35, 35)) 

CAPTCHA_BACKGROUND_COLOR = getattr(settings, 'CAPTCHA_BACKGROUND_COLOR', '#ffffff') 

CAPTCHA_FOREGROUND_COLOR = getattr(settings, 'CAPTCHA_FOREGROUND_COLOR', '#001100') 

CAPTCHA_CHALLENGE_FUNCT = getattr(settings, 'CAPTCHA_CHALLENGE_FUNCT', 'captcha.helpers.random_char_challenge') 

CAPTCHA_NOISE_FUNCTIONS = getattr(settings, 'CAPTCHA_NOISE_FUNCTIONS', ('captcha.helpers.noise_arcs', 'captcha.helpers.noise_dots',)) 

CAPTCHA_FILTER_FUNCTIONS = getattr(settings, 'CAPTCHA_FILTER_FUNCTIONS', ('captcha.helpers.post_smooth',)) 

CAPTCHA_WORDS_DICTIONARY = getattr(settings, 'CAPTCHA_WORDS_DICTIONARY', '/usr/share/dict/words') 

CAPTCHA_PUNCTUATION = getattr(settings, 'CAPTCHA_PUNCTUATION', '''_"',.;:-''') 

CAPTCHA_FLITE_PATH = getattr(settings, 'CAPTCHA_FLITE_PATH', None) 

CAPTCHA_TIMEOUT = getattr(settings, 'CAPTCHA_TIMEOUT', 5)  # Minutes 

CAPTCHA_LENGTH = int(getattr(settings, 'CAPTCHA_LENGTH', 4))  # Chars 

CAPTCHA_IMAGE_BEFORE_FIELD = getattr(settings, 'CAPTCHA_IMAGE_BEFORE_FIELD', True) 

CAPTCHA_DICTIONARY_MIN_LENGTH = getattr(settings, 'CAPTCHA_DICTIONARY_MIN_LENGTH', 0) 

CAPTCHA_DICTIONARY_MAX_LENGTH = getattr(settings, 'CAPTCHA_DICTIONARY_MAX_LENGTH', 99) 

23if CAPTCHA_IMAGE_BEFORE_FIELD: 

    CAPTCHA_OUTPUT_FORMAT = getattr(settings, 'CAPTCHA_OUTPUT_FORMAT', u'%(image)s %(hidden_field)s %(text_field)s') 

else: 

    CAPTCHA_OUTPUT_FORMAT = getattr(settings, 'CAPTCHA_OUTPUT_FORMAT', u'%(hidden_field)s %(text_field)s %(image)s') 

 

CATPCHA_TEST_MODE = getattr(settings, 'CAPTCHA_TEST_MODE', False) 

 

# Failsafe 

29if CAPTCHA_DICTIONARY_MIN_LENGTH > CAPTCHA_DICTIONARY_MAX_LENGTH: 

    CAPTCHA_DICTIONARY_MIN_LENGTH, CAPTCHA_DICTIONARY_MAX_LENGTH = CAPTCHA_DICTIONARY_MAX_LENGTH, CAPTCHA_DICTIONARY_MIN_LENGTH 

 

 

def _callable_from_string(string_or_callable): 

34    if callable(string_or_callable): 

        return string_or_callable 

    else: 

        return getattr(__import__('.'.join(string_or_callable.split('.')[:-1]), {}, {}, ['']), string_or_callable.split('.')[-1]) 

 

 

def get_challenge(): 

    return _callable_from_string(CAPTCHA_CHALLENGE_FUNCT) 

 

 

def noise_functions(): 

46    if CAPTCHA_NOISE_FUNCTIONS: 

        return map(_callable_from_string, CAPTCHA_NOISE_FUNCTIONS) 

    return [] 

 

 

def filter_functions(): 

52    if CAPTCHA_FILTER_FUNCTIONS: 

        return map(_callable_from_string, CAPTCHA_FILTER_FUNCTIONS) 

    return []