Faker is a Python package that generates fake data for you.
Project description
Faker is a Python package that generates fake data for you. Whether you need to bootstrap your database, create good-looking XML documents, fill-in your persistence to stress test it, or anonymize data taken from a production service, Faker is for you.
Faker is heavily inspired by PHP Faker, Perl Faker, and by Ruby Faker.
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For more details, see the extended docs.
Basic Usage
Install with pip:
pip install FakerNote: this package was previously called fake-factory.
Use faker.Factory.create() to create and initialize a faker generator, which can generate data by accessing properties named after the type of data you want.
from faker import Factory
fake = Factory.create()
# OR
from faker import Faker
fake = Faker()
fake.name()
# 'Lucy Cechtelar'
fake.address()
# "426 Jordy Lodge
# Cartwrightshire, SC 88120-6700"
fake.text()
# Sint velit eveniet. Rerum atque repellat voluptatem quia rerum. Numquam excepturi
# beatae sint laudantium consequatur. Magni occaecati itaque sint et sit tempore. Nesciunt
# amet quidem. Iusto deleniti cum autem ad quia aperiam.
# A consectetur quos aliquam. In iste aliquid et aut similique suscipit. Consequatur qui
# quaerat iste minus hic expedita. Consequuntur error magni et laboriosam. Aut aspernatur
# voluptatem sit aliquam. Dolores voluptatum est.
# Aut molestias et maxime. Fugit autem facilis quos vero. Eius quibusdam possimus est.
# Ea quaerat et quisquam. Deleniti sunt quam. Adipisci consequatur id in occaecati.
# Et sint et. Ut ducimus quod nemo ab voluptatum.Each call to method fake.name() yields a different (random) result. This is because faker forwards faker.Generator.method_name() calls to faker.Generator.format(method_name).
for _ in range(0, 10):
print fake.name()
# Adaline Reichel
# Dr. Santa Prosacco DVM
# Noemy Vandervort V
# Lexi O'Conner
# Gracie Weber
# Roscoe Johns
# Emmett Lebsack
# Keegan Thiel
# Wellington Koelpin II
# Ms. Karley Kiehn VProviders
Each of the generator properties (like name, address, and lorem) are called “fake”. A faker generator has many of them, packaged in “providers”.
Check the extended docs for a list of bundled providers and a list of community providers.
Localization
faker.Factory can take a locale as an argument, to return localized data. If no localized provider is found, the factory falls back to the default en_US locale.
from faker import Factory
fake = Factory.create('it_IT')
for _ in range(0, 10):
print fake.name()
> Elda Palumbo
> Pacifico Giordano
> Sig. Avide Guerra
> Yago Amato
> Eustachio Messina
> Dott. Violante Lombardo
> Sig. Alighieri Monti
> Costanzo Costa
> Nazzareno Barbieri
> Max CoppolaYou can check available Faker locales in the source code, under the providers package. The localization of Faker is an ongoing process, for which we need your help. Please don’t hesitate to create a localized provider for your own locale and submit a Pull Request (PR).
Included localized providers:
bg_BG - Bulgarian
cs_CZ - Czech
de_DE - German
dk_DK - Danish
el_GR - Greek
en_AU - English (Australia)
en_CA - English (Canada)
en_GB - English (Great Britain)
en_US - English (United States)
es_ES - Spanish (Spain)
es_MX - Spanish (Mexico)
et_EE - Estonian
fa_IR - Persian (Iran)
fi_FI - Finnish
fr_FR - French
hi_IN - Hindi
hr_HR - Croatian
hu_HU - Hungarian
it_IT - Italian
ja_JP - Japanese
ko_KR - Korean
lt_LT - Lithuanian
lv_LV - Latvian
ne_NP - Nepali
nl_NL - Dutch (Netherlands)
no_NO - Norwegian
pl_PL - Polish
pt_BR - Portuguese (Brazil)
pt_PT - Portuguese (Portugal)
ru_RU - Russian
sl_SI - Slovene
sv_SE - Swedish
tr_TR - Turkish
uk_UA - Ukrainian
zh_CN - Chinese (China)
zh_TW - Chinese (Taiwan)
Command line usage
When installed, you can invoke faker from the command-line:
faker [-h] [--version] [-o output]
[-l {bg_BG,cs_CZ,...,zh_CN,zh_TW}]
[-r REPEAT] [-s SEP]
[-i {module.containing.custom_provider othermodule.containing.custom_provider}]
[fake] [fake argument [fake argument ...]]Where:
faker: is the script when installed in your environment, in development you could use python -m faker instead
-h, --help: shows a help message
--version: shows the program’s version number
-o FILENAME: redirects the output to the specified filename
-l {bg_BG,cs_CZ,...,zh_CN,zh_TW}: allows use of a localized provider
-r REPEAT: will generate a specified number of outputs
-s SEP: will generate the specified separator after each generated output
-i {my.custom_provider other.custom_provider} list of additional custom providers to use. Note that is the import path of the module containing your Provider class, not the custom Provider class itself.
fake: is the name of the fake to generate an output for, such as name, address, or text
[fake argument ...]: optional arguments to pass to the fake (e.g. the profile fake takes an optional list of comma separated field names as the first argument)
Examples:
$ faker address
968 Bahringer Garden Apt. 722
Kristinaland, NJ 09890
$ faker -l de_DE address
Samira-Niemeier-Allee 56
94812 Biedenkopf
$ faker profile ssn,birthdate
{'ssn': u'628-10-1085', 'birthdate': '2008-03-29'}
$ faker -r=3 -s=";" name
Willam Kertzmann;
Josiah Maggio;
Gayla Schmitt;How to create a Provider
from faker import Faker
fake = Faker()
# first, import a similar Provider or use the default one
from faker.providers import BaseProvider
# create new provider class
class MyProvider(BaseProvider):
def foo(self):
return 'bar'
# then add new provider to faker instance
fake.add_provider(MyProvider)
# now you can use:
fake.foo()
> 'bar'How to customize the Lorem Provider
You can provide your own sets of words if you don’t want to use the default lorem ipsum one. The following example shows how to do it with a list of words picked from cakeipsum :
from faker import Factory
fake = Factory.create()
my_word_list = [
'danish','cheesecake','sugar',
'Lollipop','wafer','Gummies',
'sesame','Jelly','beans',
'pie','bar','Ice','oat' ]
fake.sentence()
#'Expedita at beatae voluptatibus nulla omnis.'
fake.sentence(ext_word_list=my_word_list)
# 'Oat beans oat Lollipop bar cheesecake.'How to use with Factory Boy
Factory Boy already ships with integration with Faker. Simply use the factory.Faker method of factory_boy:
import factory
from myapp.models import Book
class BookFactory(factory.Factory):
class Meta:
model = Book
title = factory.Faker('sentence', nb_words=4)
author_name = factory.Faker('name')Accessing the random instance
The .random property on the generator returns the instance of random.Random used to generate the values:
from faker import Faker
fake = Faker()
fake.random
fake.random.getstate()Seeding the Generator
When using Faker for unit testing, you will often want to generate the same data set. For convenience, the generator also provide a seed() method, which seeds the random number generator. Calling the same script twice with the same seed produces the same results.
from faker import Faker
fake = Faker()
fake.seed(4321)
print fake.name()
> Margaret BoehmThe code above is equivalent to the following:
from faker import Faker
fake = Faker()
fake.random.seed(4321)
print fake.name()
> Margaret BoehmTests
Installing dependencies:
$ pip install -r tests/requirements.txtRun tests:
$ python setup.py testor
$ python -m unittest -v testsWrite documentation for providers:
$ python -m faker > docs.txtContribute
Please see CONTRIBUTING.
License
Faker is released under the MIT License. See the bundled LICENSE file for details.
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