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Faker is a Python package that generates fake data for you.

Project description

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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.

Latest version released on PyPi Build status of the master branch on Mac/Linux Build status of the master branch on Windows Test coverage Monthly downloads Package license

For more details, see the extended docs.

Basic Usage

Install with pip:

pip install 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()
# 'Lucy Cechtelar'

# "426 Jordy Lodge
#  Cartwrightshire, SC 88120-6700"

# 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 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):

    # 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 V


Each of the generator properties (like name, address, and lorem) are called “fake”. A faker generator has many of them, packaged in “providers”. Here is a list of the bundled formatters in the default locale.


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):

> Elda Palumbo
> Pacifico Giordano
> Sig. Avide Guerra
> Yago Amato
> Eustachio Messina
> Dott. Violante Lombardo
> Sig. Alighieri Monti
> Costanzo Costa
> Nazzareno Barbieri
> Max Coppola

You 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:

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 ...]]


  • 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 ...]: is an optional comma-separated list of field names to pass to the fake, such as ssn,birthday when the profile fake is used


$ 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

# now you can use:
> 'bar'

How to use with factory-boy

import factory
from faker import Factory as FakerFactory
from myapp.models import Book

faker = FakerFactory.create()

class Book(factory.Factory):
    FACTORY_FOR = Book

    title = factory.LazyAttribute(lambda x: faker.sentence(nb_words=4))
    author_name = factory.LazyAttribute(lambda x:

Seeding the Generator

When using Faker for unit testing, you will often want to generate the same data set. The generator offers 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()

> Margaret Boehm


Installing dependencies:

$ pip install -r faker/tests/requirements.txt

Run tests:

$ python test


$ python -m unittest -v faker.tests

Write documentation for providers:

$ python -m faker > docs.txt




Faker is released under the MIT License. See the bundled LICENSE file for details.

0.5.3 - 21-September-2015

  • Added company_vat to company fi_FI provider. Thanks @kivipe.
  • Seed a Random instance instead of the module. Thanks Amy Hanlon.
  • Fixed en_GB postcodes to be more realistic. Thanks @mapleoin for the report.
  • Fixed support for Python 3 in the python provider. Thanks @derekjamescurtis.
  • Fixed U.S. SSN generation. Thanks @jschaf.
  • Use environment markers for wheels. Thanks @RonnyPfannschmidt
  • Fixed Python3 issue in pyiterable and pystruct providers. Thanks @derekjamescurtis.
  • Fixed en_GB postcodes to be more realistic. Thanks @mapleoin.
  • Fixed and improved performance of credit card number provider. Thanks @0x000.
  • Added Brazilian SSN, aka CPF. Thanks @ericchaves.
  • Added female and male names for fa_IR. Thanks @afshinrodgar.
  • Fixed issues with Decimal objects as input to geo_coordinate. Thanks @davy.
  • Fixed bug for center set to None in geo_coordinate. Thanks @davy.
  • Fixed deprecated image URL placeholder services.
  • Fixed provider’s example formatting in documentation.
  • Added en_AU provider. Thanks @xfxf.

0.5.2 - 11-June-2015

  • Added uuid4 to misc provider. Thanks Jared Culp.
  • Fixed jcb15 and jcb16 in credit_card provider. Thanks Rodrigo Braz.
  • Fixed CVV and CID code generation in credit_card provider. Thanks Kevin Stone.
  • Added --include flag to command line tool. Thanks Flavio Curella.
  • Added country_code to address` provider. Thanks @elad101 and Tobin Brown.

0.5.1 - 21-May-2015

  • Fixed egg installation. Thanks David R. MacIver, @kecaps
  • Updated person names for ru_RU. Thanks @mousebaiker.
  • Updated ko_KR locale. Thanks Lee Yeonjae.
  • Fixed installation to install importlib on Python 2.6. Thanks Guillaume Thomas.
  • Improved tests. Thanks Aarni Koskela, @kecaps, @kaushal.
  • Made Person prefixes/suffixes always return strings. Thanks Aarni Koskela.
  • pl_PL jobs added. Thanks Dariusz Choruży.
  • Added ja_JP provider. Thanks Tatsuji Tsuchiya, Masato Ohba.
  • Localized remaining providers for consistency. Thanks Flavio Curella.
  • List of providers in compiled on runtime and is not hardcoded anymore. Thanks Flavio Curella.
  • Fixed State names in en_US. Thanks Greg Meece.
  • Added time_delta method to date_time provider. Thanks Tobin Brown.
  • Added filename and file extension methods to file provider. Thanks Tobin Brown.
  • Added Finnish ssn (HETU) provider. Thanks @kivipe.
  • Fixed person names for pl_PL. Thanks Marek Bleschke.
  • Added sv_SE locale providers. Thanks Tome Cvitan.
  • pt_BR Provider: Added catch_phrase to Company provider and fixed names in Person Provider. Thanks Marcelo Fonseca Tambalo.
  • Added sk_SK localized providers. Thanks @viktormaruna.
  • Removed miscelleneous provider. It is superceded by the misc provider.

0.5.0 - 16-Feb-2015

  • Localized providers
  • Updated ko_KR provider. Thanks Lee Yeonjae.
  • Added pt_PT provider. Thanks João Delgado.
  • Fixed mispellings for en_US company provider. Thanks Greg Meece.
  • Added currency provider. Thanks Wiktor Ślęczka
  • Ensure choice_distribution always uses floats. Thanks Katy Lavallee.
  • Added uk_UA provider. Thanks Cyril Tarasenko.
  • Fixed encoding issues with README, CHANGELOG and Thanks Sven-Hendrik Haase.
  • Added Turkish person names and phone number patterns. Thanks Murat Çorlu.
  • Added ne_NP provider. Thanks Sudip Kafle.
  • Added provider for Austrian de_AT. Thanks Bernhard Essl.

0.4.2 - 20-Aug-2014

  • Fixed setup

0.4.1 - 20-Aug-2014

  • Added MAC address provider. Thanks Sébastien Béal.
  • Added lt_LT and lv_LV localized providers. Thanks Edgar Gavrik.
  • Added nl_NL localized providers. Thanks @LolkeAB, @mdxs.
  • Added bg_BG localized providers. Thanks Bret B.
  • Added sl_SI. Thanks to @janezkranjc
  • Added distribution feature. Thanks to @fcurella
  • Relative date time. Thanks to @soobrosa
  • Fixed date_time_ad on 32bit Linux. Thanks @mdxs.
  • Fixed domain_word to output slugified strings.

0.4 - 30-Mar-2014

  • Modified en_US to ouput female and male names. Thanks Adrian Klaver.
  • Added SSN provider for en_US and en_CA. Thanks Scott (@milliquet).
  • Added hi_IN localized provider. Thanks Pratik Kabra.
  • Refactoring of command line

0.3.2 - 11-Nov-2013

  • New provider: Credit card generator
  • Improved Documentor


  • FIX

0.3 - 18-Oct-2013

  • PEP8 style conversion (old camelCased methods are deprecated!)
  • New language: pt_BR (thanks to @rvnovaes)
  • all localized provider now uses from __future__ import unicode_literals
  • documentor prints localized provider after all defaults
  • FIX tests for python 2.6

0.2 - 01-Dec-2012

  • New providers: Python, File
  • Providers imported with __import__
  • Module is runnable with python -m faker [name] [*args]
  • Rewrite fake generator system (allow autocompletation)
  • New language: French
  • Rewrite module __main__ and new Documentor class

0.1 - 13-Nov-2012

  • First release

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