An easy-to-use math field/widget captcha for Django forms.
Current Version: 1.0.9
What is it?
A multi-value-field that presents a human answerable question, with no settings.py configuration necessary, but instead can be configured with arguments to the field constructor.
You can do any of the following to install django-simple-math-captcha
- Run pip install django-simple-math-captcha.
- Download or “git clone” the package and run setup.py.
- Download or “git clone” the package and put the simplemathcaptcha directory on your PYTHONPATH.
To add the captcha field to your form:
from django import forms from simplemathcaptcha.fields import MathCaptchaField class MyForm(forms.Form): some_text_field = models.CharField(max_length=50) captcha = MathCaptchaField()
Optionally, you can pass in the following arguments to the field to configure it.
The number at which the field should begin its range of random numbers. This value will be used passed into the creation of a simplemathcaptcha.widgets.MathCaptchaWidget for this field.
Default value: 1
The number at which the field should end its range of random numbers. This value will be used passed into the creation of an simplemathcaptcha.widgets.MathCaptchaWidget for this field.
Default value: 10
A dictionary of error messages. The keys you can use are invalid and invalid_number.
is the message to display when the provided answer is incorrect
Default value: "Check your math and try again."
is the message to display when the entry is not a whole number
Default value: "Enter a whole number."
A string with format placeholders to use for the displayed question.
Default value: "What is %(num1)i %(operator)s %(num2)i?"
A css class to use for the span containing the displayed question.
Default value: "captcha-question"
The widget instance to use, instead of the field creating an instance of simplemathcaptcha.widgets.MathCaptchaWidget. When provided, it must be an instatiated widget, not a widget class.
Additionally, when specifying widget, you must not specify start_int or end_int.
Default value: None
Other math captcha fields can present questions that require decimal answers, answers that could be negative values and that require settings.py configuration. This project aims to provide a single field with minimal or no configuration necessary and reduce or prevent spam form submissions.
django-simple-math-captcha is currently used in production.
- Simple addition, subtraction or multiplication question for captcha
- No configuration necessary
- Question asked changes with every render
- Uses SHA1 hashing of answer with your SECRET_KEY
- Unit tests are provided in the source
- Python 2.6+
- Django 1.4+
The django-simple-math-captcha app is released under the Apache Public License v2.
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