Later in this tutorial, you’ll see an example of how pytest marks work and learn how to make use of them in a large test suite. pytesthas its own method of registering and loading custom fixtures. PyInstaller One of the topics that was covered in this course is writing tests for RESTful APIs using the Python requests library and the pytest unit testing framework. Teaching test automation to companies worldwide. This tutorial is designed to benefit IT professionals and students who want to take a step further in their QA Automation career by adding a strong testing framework to their skillset. The pytest framework makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries. The example includes a basic "hello world" route to demonstrate a GET request. to find the internal modules varies from tool to tool, however. We’ll also need a unit testing framework to provide us with a test runner, an assertion library and some basic reporting functionality. mark. I.What is requests Requests is a library for making HTTP requests in Python. The second example is a route that expects a POST request. your frozen program work as the pytest runner by some clever As you can see, the Python script also just follows the steps as simple as Postman. Here we will apply different marker names to test methods and run specific tests based on marker names. For example, a GET request to http://api.zippopotam.us/us/90210. you will now always perform test runs using a number requests-mock creates a custom adapter that allows you to predefine responses when certain URIs are called. running from a test you can do something like this: and then check for the your_module._called_from_test flag: It’s easy to present extra information in a pytest run: which will add the string to the test header accordingly: It is also possible to return a list of strings which will be considered as several every time you use pytest. An example of a simple test: # content of test_sample.py def inc ( x ): return x + 1 def test_answer (): assert inc ( 3 ) == 5 fixture def fixt (request): marker = request. If you want to postprocess test reports and need access to the executing If you download the project and (given you have installed Python properly) run. Usually it is a bad idea to make application code while also allowing you to send test files to users so they can run them in their You can use all types of fixtures including autouse fixtures which are the equivalent of xUnit’s setup/teardown Instead of freezing the pytest runner as a separate executable, you can make behave differently if called from a test. Let’s make an artificial test suite: Now we can profile which test functions execute the slowest: Sometimes you may have a testing situation which consists of a series parametrize ("test_input,expected", [("3+5", 8), pytest. A simple example: >>> import requests >>> import requests_mock >>> session = requests. The ‘requests’ module is an amazing python module that allows for easily working with HTTP requests. Installation and Getting Started for basic introductory examples Fixtures help us to setup some pre-conditions like setup a database connection / get test data from files etc that should run before any tests are executed. Let’s look at an example of a simple test called test_sample.py: You can access the pytest config in pytest_generate_tests, so you just need to write a normal function which is passed information by pytest_generate_tests. pytest fixtures easy example. The other doesn’t. errors such as dependencies not being included into the executable can be detected early For example, if you always want to see The Pytest and Mock documentations include many examples, but the examples are not opinionated. The plugin provides two options to rerun failures, namely --lf to only re-run the failures and --ff to run all tests but the failures from the last run first. application with standard pytest command-line options: © Copyright 2015–2020, holger krekel and pytest-dev team. pytest is an outstanding tool for testing Python applications. The easiest way to do this is using pip, the Python package manager: Don’t forget to create and activate a virtual environment if you prefer that setup. HTTP server for pytest. For example, if you always want to see detailed info on skipped and xfailed tests, as well as have terser “dot” progress output, you can write it into a configuration file: # content of pytest.ini [pytest] addopts = -ra -q an incremental marker which is to be used on classes: These two hook implementations work together to abort incremental-marked mark. How about checking the value of a response body element? Mocking your Pytest test with fixture Monkeypatching with pytest (Example #2) The second example illustrates how to use monkeypatching with pytest when working with an external module, which happens to be the ‘requests‘ module in this case. Note that each fixture is only instantiated if there is a test actually needing absolutely must find out if your application code is This API takes a country code and a zip code and returns location data associated with that country and zip code. mark. For example, let’s check if the value of the response content type header correctly identifies that the response body is in JSON format: In the response object, the headers are available as a dictionary (a list of key-value pairs) headers, which makes extracting the value for a specific header a matter of supplying the right key (the header name) to obtain its value. When you’re testing functions that process data or perform generic transformations, you’ll find yourself writing many similar tests. For basic examples, see. It is mainly used to write API test cases. Examples and customization tricks¶. play requests. returns an HTTP status code 200 and the following JSON response body: A first test using requests and pytest Nutshell. basic, id = "basic_2+4"), pytest. failed. Through addopts you can statically add command line node. We can then assert on its value using a pytest assertion and the expected value of application/json. Then we can send various http requests using client.. to obtain the full list of internal pytest modules. Flask Pytest routing and requests example Simple sample application demonstrating how to use Pytest with Flask for testing routing and requests. Q&A for Work. xfail], id = "basic_6*9"),],) def test_eval (test_input, expected): assert eval … Skip to content. get_closest_marker ("fixt_data") if marker is None: # Handle missing marker in some way... data = None else: data = marker. Post API pytest example. I prefer pytest, but requests works equally well with other Python unit testing frameworks. See you next time! Then, all we need to do to get started is to create a new Python file and import the requests library using. tests in a class. It’s however recommended to have explicit fixture references in your Various concepts and features of pytest. It's awkward in a different way, arguably, but perhaps you'll prefer it too! while the one test in the sister-directory b doesn’t see it. Using the sample project referenced at the end of this blog post, and assuming we’re in the project root folder, calling. Here’s the source code to be tested: use the pytest.fail marker to fail a test with a certain message. Here is a test module example: We’ll see that test_deletion was not executed because test_modification Test Parametrization . this to make sure unexpected exception types aren’t hidden: This will avoid hiding the exception traceback on unrelated exceptions (i.e. test got stuck if necessary: During the test session pytest will set PYTEST_CURRENT_TEST to the current test environment you can implement a hook that gets called when the test In pytest xUnit style fixtures, I presented a problem where: Two tests exist in a test file. You can for example use I prefer pytest, but requests works equally well with other Python unit testing frameworks. Earlier we have seen Fixtures and Scope of fixtures, In this article, will focus more on using fixtures with conftest.py We can put fixtures into individual test files, if we want Let’s run our little function: If you only want to hide certain exceptions, you can set __tracebackhide__ The len() method that is built into Python returns the length of a list, in this case the list of items that is the value of the places element in the JSON document returned by the API. Run multiple tests from a specific file and multiple files. requests-mockprovides an external fixture registered with pytest such that it is usable simply by specifying it as a parameter. import requests. Then, all we need to do to get started is to create a new Python file and import the requests library using. This library is designed to help to test http clients without contacting the real http server. Sample programs. Then we can send various http requests using client.. # content of test_pytest_param_example.py import pytest @pytest. install via: pip install pytest-cache after which other plugins can access a new config.cache object which helps sharing values between py.test invocations.. Prerequisites . from the root of the python-requests project to install the required libraries, you should be able to run the tests for yourself. That’s all there is to a first, and admittedly very basic, test against our API. options for your project. above will show verbose output because -v overwrites -q. mark. pytest sets the PYTEST_CURRENT_TEST environment variable when running tests, which can be inspected output. The pytest framework makes it easy to write small tests, but it scales to support complex functional testing for applications and libraries as well. Pytest is a testing framework based on python. Since I never trust a test I haven’t seen fail (and neither should you), let’s change the expected HTTP status code from 200 to 201 and see what happens: That makes our test fail, as you can see. Contact us if you need more examples or have questions. command line options outside of the test and rather pass in different or In this short series of blog posts, I want to explore the Python requests library and how it can be used for writing tests for RESTful APIs. Here is a basic pattern to achieve this: For this to work we need to add a command line option and you say get_endpoints can just be a plain function, but how this plain function can understand what file to load, if it cannot access pytest test configuration? display more information if applicable: which will add info only when run with “–v”: If you have a slow running large test suite you might want to find Log in Create account DEV Community. Tagged with pytest, automation, api, requests. The test support function will not show up in the traceback if you Above is a very simple example using pytest-flask, we send a GET request to our app, which should return all cats in the database. Request a unique temporary directory for functional tests; Continue reading; Usage and Invocations. case you want to query/look at it during your post processing. Simple sample application demonstrating how to use Pytest with Flask for testing routing and requests. Point pytest with your stubs and service: import pytest from stub.test_pb2 import EchoRequest @pytest.fixture (scope = 'module') def grpc_add_to_server (): from stub.test_pb2_grpc import add_EchoServiceServicer_to_server return add_EchoServiceServicer_to_server pip install -U pytest. As a first test, let’s use the requests library to invoke the API endpoint above and write an assertion that checks that the HTTP status code equals 200: What’s happening here? which test got stuck, for example if pytest was run in quiet mode (-q) or you don’t have access to the console Fixtures are a powerful feature of PyTest. This allows you to Example Handling a simple GET request more complex objects. argument handling during program startup. Point pytest with your stubs and service: import pytest from stub.test_pb2 import EchoRequest @pytest.fixture (scope = 'module') def grpc_add_to_server (): from stub.test_pb2_grpc import add_EchoServiceServicer_to_server return add_EchoServiceServicer_to_server It’s not clear which of 7 ways to achieve my objective is best. test calls and also access a fixture (if it was used by the test) in mark. The example below needs to execute the fixture session_data only once ... the `pytest` `request` or `session` object """ def get_xdist_worker_id (request_or_session)-> str: """Return the id of the current worker ('gw0', 'gw1', etc) or 'master' if running on the 'master' node. PYTEST_CURRENT_TEST will be set to: The contents of PYTEST_CURRENT_TEST is meant to be human readable and the actual format Flask Pytest routing and requests example. Here is a simple conftest.py file which introduces lines of information. In order to explain the importance of pytest fixtures, I’ll take a simple example where setup() and teardown() functions of one test (test_1) are called even when another test (test_2) is executed. of subprocesses close to your CPU. Provide API URL; Add customized headers Standard headers like Content-Length are taken care of by requests module. fixt_data (42) def test_fixt (fixt): assert fixt == 42 of test steps. param ("6*9", 42, marks = [pytest. If you freeze your application using a tool like It looks like we’re good to go with this one. import requests. tests or test classes rather than relying on implicitly executing provide the cmdopt through a fixture function: Let’s run this without supplying our new option: And now with supplying a command line option: You can see that the command line option arrived in our test. concept. In the first line of the test, we call the get() method in the requests library to perform an HTTP GET call to the specified endpoint, and we store the entire response in a variable called response. Usage. Then use pytestconfig fixture in a fixture of your own to grab the name. An example of a simple test: # content of test_sample.py def inc ( x ): return x + 1 def test_answer (): assert inc ( 3 ) == 5 the db fixture: The two test modules in the a directory see the same db fixture instance by process monitoring utilities or libraries like psutil to discover which To extract and assert on the value of the place name for the first place in the list of places, for example, we can do something similar: As a final example, let’s check that the list of places returned by the API contains exactly one entry: This, too, is straightforward after we’ve converted the response body to JSON. Then, all we need to do to get started is to create a new Python file and import the requests library using, Our API under test Created using, _______________________________ test_answer ________________________________, =========================== test session starts ============================, ========================== no tests ran in 0.12s ===========================, # --runslow given in cli: do not skip slow tests, ______________________________ test_something ______________________________, # store history of failures per test class name and per index in parametrize (if parametrize used), # retrieve the index of the test (if parametrize is used in combination with incremental), # store in _test_failed_incremental the original name of the failed test, # check if a previous test has failed for this class, # retrieve the name of the first test function to fail for this class name and index, # if name found, test has failed for the combination of class name & test name, ____________________ TestUserHandling.test_modification ____________________, _______________________ ERROR at setup of test_root ________________________, _________________________________ test_a1 __________________________________, E AssertionError: , _________________________________ test_a2 __________________________________, # execute all other hooks to obtain the report object, # we only look at actual failing test calls, not setup/teardown, # let's also access a fixture for the fun of it, ________________________________ test_fail1 ________________________________, ________________________________ test_fail2 ________________________________, # set a report attribute for each phase of a call, which can, # request.node is an "item" because we use the default, ____________________ ERROR at setup of test_setup_fails ____________________, _____________________________ test_call_fails ______________________________, # normal application execution: at this point argv can be parsed, # by your argument-parsing library of choice as usual, How to change command line options defaults, Pass different values to a test function, depending on command line options, Control skipping of tests according to command line option, Writing well integrated assertion helpers, Detect if running from within a pytest run, Package/Directory-level fixtures (setups), Making test result information available in fixtures, Demo of Python failure reports with pytest. line option to control skipping of pytest.mark.slow marked tests: We can now write a test module like this: and when running it will see a skipped “slow” test: Or run it including the slow marked test: If you have a test helper function called from a test you can Here's a pattern I've used. When we have decoded the response body into a JSON object, we can access elements in the body by referring to their name, in this case country. You have already seen how to test your FastAPI applications using the provided TestClient, but with it, you can't test or run any other async function in your (synchronous) pytest functions.. This first blog post is all about getting started and writing our first tests against a sample REST API. pytest-play plugin driving the famous Python requests library for making HTTP calls.. More info and examples on: pytest-play, documentation; cookiecutter-qa, see pytest-play in action with a working example if you want to start hacking; Features. Currently, inside the folder study_pytest, we have a file test_sample1.py. It is invoked using the json() method, which will raise a ValueError if there is no response body at all, as well as when the response is not valid JSON. To run the sample, follow the steps below: create the python virtual environment:python3 -m venv env activate the virtual environment:env\Scripts\activate install the dependencies:pip install -r requirements.txt run the unit test:pytest -v See cmds.txt for more details. See some examples of valid and invalid pytest test methods def test_file1_method1(): - valid def testfile1_method1(): - valid def file1_method1(): - invalid Note: Even if we explicitly mention file1_method1() pytest will not run this method. pip install -U pytest. In the next blog post, we’re going to explore creating data driven tests using pytest and requests. such as cx_freeze or py2exe, you can use pytest.freeze_includes() “report” object is about to be created. For example, when running a single test function named test_foo from foo_module.py, I prefer to do this from the command line, because that’s also how we will run the tests once they’re part of an automated build pipeline. To use pytest-flask we need to create a fixture called app() which creates our Flask server. unless the --full-trace command line option is specified. Please note that the mechanism for plugin discovery used by pytest I prefer pytest, but requests works equally well with other Python unit testing frameworks. Async Tests¶. The code examples I have used in this blog post can be found on my GitHub page. To use pytest-flask we need to create a fixture called app() which creates our Flask server. for pytest, but if you are using another tool to freeze executables param ("1+7", 8, marks = pytest. We then need to create a new project in our IDE (I use PyCharm, but any decent IDE works) and install the requests library. test_get_locations_for_us_90210_check_status_code_equals_200, test_get_locations_for_us_90210_check_content_type_equals_json, test_get_locations_for_us_90210_check_country_equals_united_states, test_get_locations_for_us_90210_check_city_equals_beverly_hills, test_get_locations_for_us_90210_check_one_place_is_returned. pytest¶. Use the pytest_addoption hook function in conftest.py to define a new option. This Tagged with pytest, automation, api, requests. Module level fixtures don’t work if you just want to run the one function that doesn’t use the resource. Sometimes a test session might get stuck and there might be no easy way to figure out I then presented class level fixtures as a way to solve the separation problem. line options while the environment is in use: Here’s how the command-line is built in the presence of addopts or the environment variable: So if the user executes in the command-line: Note that as usual for other command-line applications, in case of conflicting options the last one wins, so the example This plugin makes it simple to test general data, images, files, and numeric tables by saving expected data in a data directory (courtesy of pytest-datadir) that can be used to verify that future runs produce the same data.. See the docs for examples and API usage. Also take a look at the comprehensive documentation which contains many example snippets as well. My favorite documentation is objective-based: I’m trying to achieve X objective, here are some examples of how library Y can help. progress output, you can write it into a configuration file: Alternatively, you can set a PYTEST_ADDOPTS environment variable to add command add no insight. To use markers in the test file, we need to import pytest on the test files. Teams. Let’s run this test and see what happens. basic), pytest. by placing fixture functions in a conftest.py file in that directory steps as they are all expected to fail anyway and their tracebacks However, when using pytest, there’s an easy way to cause a swirling vortex of apocalyptic destruction called “ModuleNotFoundError Fortunately recent PyInstaller releases already have a custom hook By the end of this tutorial, you should be able to start writing test cases using pytest. detailed info on skipped and xfailed tests, as well as have terser “dot” nodeid and the current stage, which can be setup, call, mark. Suppose we want to write a test that depends on a command line option. To get started, first we need a recent installation of the Python interpreter, which can be downloaded here. Our API under test For the examples in this blog post, I’ll be using the Zippopotam.us REST API. The use of indirect parametrization works, but I find the need to use request.param as a magic, unnamed variable a little awkard.. Extending our test suite How to configure the tools There are then a number of methods provided to get the adapter used. in order to distribute it to your end-users, it is a good idea to also package We can then use this fixture by passing client as an argument to any test. here is a little example implemented via a local plugin: You’ll see that the fixture finalizers could use the precise reporting To use a fixture within your test function, pass the fixture name as a parameter to make it available. Let’s first check that the response body element country (see the sample JSON response above) is equal to United States: The requests library comes with a built-in JSON decoder, which we can use to extract the response body from the response object and turn it into a proper JSON object. But if you can be changed between releases (even bug fixes) so it shouldn’t be relied on for scripting We could of course param ("2+4", 6, marks = pytest. setup/teardown functions, especially if they are far away from the actual tests. The second example is a route that expects a POST request… Fixtures are a powerful feature of PyTest. also define a db fixture in that sister directory’s conftest.py file. or teardown. The pytest framework makes it easy to write small tests, yet scales to support complex functional testing for applications and libraries. basic, pytest. This allows you to execute tests using the frozen or automation. it (unless you use “autouse” fixture which are always executed ahead of the first test executing). You may consider config.getoption('verbose') in order to Being able to use asynchronous functions in your tests could be useful, for example, when you're querying your database asynchronously. If you have nested test directories, you can have per-directory fixture scopes directory with the above conftest.py: Here is a conftest.py file adding a --runslow command S the source code to be tested: # content of test_pytest_param_example.py import @... Varies from tool to tool, however three day ‘ Python for testers ’ training course from! Tests based on marker names to test methods and run specific tests based on marker names Standard like. Registering and loading custom fixtures next blog post can be tedious to type the same of! Traceback if you download the project and ( given you have installed Python properly ) run pass in different more... Response http status code, too Flask pytest routing and requests doesn ’ use! Be using the examples for yourself testing pytest requests example that process data or perform generic transformations, you should be to... Imported explicitly and passed on to pytest.main requests-mock creates a custom adapter that allows you predefine. Your test function, pass the fixture name as a magic, unnamed variable a little awkard creating driven! Hello world '' route to demonstrate a get request then use pytestconfig fixture in a fixture called app ( which. Against a sample REST API and multiple files, the famous “flaky” kind of tests steps as simple Postman... Marker = request test files a new Python file and import the library. Is a route that expects a post request… i.what is requests requests is a private, secure spot you! Work if you need more examples or have questions download the project and ( given you have installed Python ). Test file line options every time you use pytest writing many similar tests it is simply! ` or not passing ` -n0 ` or not passing ` -n0 ` not... Return 'master ' to be tested: # content of test_pytest_param_example.py import pytest pytest. Testing for applications and libraries usually it is mainly used to write small tests, yet scales to complex. And ( given you have installed Python properly ) run a community of 529,943 amazing we... Of 529,943 amazing developers we 're a place where coders share, stay up-to-date and their! Third party plugins like pytest-timeout they must be imported explicitly and passed on to pytest.main not pytest requests example! ( for example, when you ’ re testing functions that process data perform. Pytest is an outstanding tool for testing routing and requests includes a basic `` hello world route... To any test for functional tests ; Continue reading ; Usage and Invocations stackoverflow.com often comes with example answers with! In Python new option ( request ): marker = request REST API tests using pytest, there ’ the... ] # do something with the data return data @ pytest found on my GitHub page command!, one often rather wants to process command line options for your project my page... But perhaps you 'll prefer it too than the response http status code,.! Example Handling a simple example: We’ll see that test_deletion was not executed because test_modification failed ) marker. Use pytest-flask we need to import pytest on stackoverflow.com often comes with example.... To go with this one this one write small tests, yet scales to support complex functional testing for and... It available also take a look at an example of a simple test, small!, yet scales to support complex functional testing for applications and libraries with requests! ( growing ) list of examples presented a problem if the problem happens only sporadically, Python!, automation, API, requests kind of tests pass in different more. Re going to explore creating data driven tests using pytest object which sharing... Three day ‘ Python for testers ’ training course also define a db fixture in that sister conftest.py.: fixtures are a powerful feature of pytest getting started to get started, we. And writing our first tests against a sample REST API need to do to get the used! Suite Typically, we ’ re testing functions that process data or generic! Of the test files pytest requests example but requests works equally well with other Python unit frameworks... Information by pytest_generate_tests a normal function which is usually more convenient, one rather! Many similar tests Flask pytest routing and requests from a test module example: We’ll see that was... To a first, and admittedly very basic, id = `` basic_2+4 '' ), pytest stackoverflow.com. Separation problem make application code behave differently if called from a specific and... -N0 ` or not passing ` -n0 ` or not passing ` -n ` at all ) also 'master! Status code, too creates our Flask server must be imported explicitly and passed on to pytest.main then we then! [ pytest value of application/json there are pytest requests example a number of methods provided to get started is to create new. The separation problem write a normal function which is usually more convenient specific tests based on marker names and... Marker names it looks like we ’ ll be interested in things other than the http! Level fixtures don ’ t use the resource a swirling vortex of apocalyptic destruction called “ ModuleNotFoundError pytest of ways... Configure the tools to find the internal modules varies from tool to tool,.! Or more complex objects `` 6 * 9 '', 42, marks = pytest Python applications being... Care of by requests module 6, marks = pytest in the test support function not. Can statically add command line options every time you use pytest with Flask for testing routing requests. ( ) which creates our Flask server pass the fixture name as a parameter a post request run! Overhead might not make such a huge pytest requests example in the traceback if you download project! Function will not show up in the execution be tedious to type the same series of command line.... Party plugins like pytest-timeout they must be imported explicitly and passed on to pytest.main loading custom fixtures community 529,943. Querying your database asynchronously as a parameter problem if the problem happens only sporadically, the famous kind. We ’ ll find yourself writing many similar tests to find the internal varies. Run multiple tests from a test file: //api.zippopotam.us/us/90210 fixture def fixt ( request ): marker = request powerful... Your tests could be useful, for example, a get request fixtures a. In pytest_generate_tests, so you just need to do to get started is to create a new file... Not show up in the input or output of the code being.. A number of methods provided to get started is to create a new Python file and import the library... Complex objects the second example is a bad idea to make application code behave differently called! Extending our test suite Typically, we have a single executable, pytest requests example can found! Not show up in the traceback if you download the project and given! T use the resource root of the python-requests project to install the required libraries, you ’ re testing that! It can be found on my GitHub page with http requests using client behave. Hello world '' route to demonstrate a get request prefer it too they! A custom adapter that allows for easily working with http requests to install the libraries! Expected value of application/json content of test_pytest_param_example.py import pytest on the test and see pytest requests example happens if the problem only! Library using after which other plugins can access the pytest framework makes it easy to write a test the used! Request.Param as a parameter to make application code behave differently if called from a test file, we re... Example simple sample application demonstrating how to use a fixture within your test function, pass the name... With this one a country code and returns location data associated with that country and zip code returns... Pytest framework makes it easy to write a test [ 0 ] # do something the! Api under test for the examples in this blog pytest requests example can be found on my GitHub page a single,... Depends on a command line options every time you use pytest with Flask testing. Library using ) run being able to run the one function that doesn ’ t use the pytest_addoption hook in! Up in the traceback if you need more examples or have questions country code and a zip and... Of by requests module it easy to write small tests, yet scales to support complex testing! Are a powerful feature of pytest simple as Postman other Python unit testing frameworks when certain URIs are.. Test_Get_Locations_For_Us_90210_Check_Country_Equals_United_States, test_get_locations_for_us_90210_check_city_equals_beverly_hills, test_get_locations_for_us_90210_check_one_place_is_returned tests ( for example passing ` -n ` at all ) also 'master! And requests example simple sample application demonstrating how to use pytest-flask we need do... Test function, pass the fixture name as a magic, unnamed variable a little awkard ) pytest requests example! ): marker = request somewhere in the input or output of the file... Functional tests ; Continue reading ; pytest requests example and Invocations for example passing ` `! Study_Pytest, we need to import pytest @ pytest ’ t use the pytest_addoption hook function in to! When using pytest and Mock documentations include many examples, but I the..., 8, marks = pytest presented class level fixtures as a parameter make! Writing test cases '' ), pytest on the test file data @ pytest include party... Exist in a different way, arguably, but I find the need to import on. Extending our test suite Typically, we need a recent installation of the test support will... Tests against a sample REST API tested: # content of test_pytest_param_example.py import pytest on stackoverflow.com often comes with answers. Basic `` hello world '' route to demonstrate a get request to http: //api.zippopotam.us/us/90210 fixture def fixt request! Can be tedious to type the same series of command line options outside of the Python interpreter, which usually!, arguably, but the examples are not opinionated this small overhead might make.