Your First Open Source Contribution in Python - From Fork to Pull Request

PyCon DE & PyData 2026
Camila Maia

Transcript

1. Your First Open Source Contribution in Python PyCon DE & PyData 2026 Camila Maia From Fork to Pull Request
2. speakerdeck.com/cumbucadev
3. Hello!
10. Developer Experience Specialist
11. Co-founder
12. CUMBUCA DEV CUMBUCA DEV CUMBUCA DEV
13. CUMBUCA DEV CUMBUCA DEV CUMBUCA DEV
14. CUMBUCA DEV CUMBUCA DEV CUMBUCA DEV
15. CUMBUCA DEV CUMBUCA DEV CUMBUCA DEV
16. Agenda
17. 1.Open Source
18. 1.Open Source 2.ScanAPI
19. 1.Open Source 2.ScanAPI 3.Contributing to ScanAPI
20. 1.Open Source 2.ScanAPI 3.Contributing to ScanAPI 4.Closing
21. Open Source
22. PUBLICLY AVAILABLE CODE
23. VIEW PUBLICLY AVAILABLE CODE
24. VIEW MODIFICATE PUBLICLY AVAILABLE CODE
25. VIEW DISTRIBUTE MODIFICATE PUBLICLY AVAILABLE CODE
26. VIEW DISTRIBUTE MODIFICATE LICENSE PUBLICLY AVAILABLE CODE
27. Why Open Source matters
28. About 97% of applications in the world use open source code
29. It enables global-scale collaboration
30. Critical infrastructure
31. Why Open Source Matters for YOU
32. Real-world experience
33. Portfolio and visibility
34. Learn from others
35. Confidence and ownership
36. Opportunity to give back
38. DON’T HAVE EXPERIENCE BECAUSE CAN’T GET A JOB
39. OPEN SOURCE COLLABORATION REAL EXPERIENCES DON’T HAVE EXPERIENCE
40. Contributing to an Open Source project
41. github.com/cumbucadev/git-chaos
42. ScanAPI
44. Integration Errors
45. Client sending fields different than what’s expected
46. Client sending fields different than what’s expected Frontend receiving fields different than what’s expected
47. Outdated documentation
48. Missing endpoints
49. Missing endpoints Missing fields
50. Missing endpoints Missing fields Misinformation
52. Hard to recreate complex scenarios
53. /book/:seat_id
54. /book/:seat_id flight_id? airplane_id?
55. /book/:seat_id flight_id? airplane_id? passenger_id?
56. /book/:seat_id flight_id? airplane_id? passenger_id? Is the airplane available?
57. /book/:seat_id flight_id? airplane_id? passenger_id? Is the airplane available? ????
61. Open Source Framework
62. Command Line Interface (CLI)
63. Written in Python
64. What for?
65. 1. Tool to implement Integration Tests
66. 2. Provide a Live Documentation
67. Specification
68. Specification
69. Specification For each request:
70. Specification For each request: Hit the endpoints
71. Specification For each request: Hit the endpoints Run the tests
72. Specification Report For each request: Hit the endpoints Run the tests
73. Example
74. PokéAPI pokeapi.co
75. $ http https://pokeapi.co/api/v2/pokemon/
78. Installation
79. Python $ pip install scanapi
80. How to use?
81. # scanapi.yaml endpoints: - name: pokeapi path: https://pokeapi.co/api/v2/ endpoints: - name: pokemon path: pokemon requests: - name: list_all method: get path: /
82. # scanapi.yaml endpoints: - name: pokeapi path: https://pokeapi.co/api/v2/ endpoints: - name: pokemon path: pokemon requests: - name: list_all method: get path: / path: https://pokeapi.co/api/v2/ pokemon /
83. # scanapi.yaml endpoints: - name: pokeapi path: https://pokeapi.co/api/v2/ endpoints: - name: pokemon path: pokemon requests: - name: list_all method: get path: / path: https://pokeapi.co/api/v2/ pokemon / name: pokeapi :: pokemon :: list_all
84. $ scanapi run
85. Documentation 📄
86. Documentation 📄
87. Documentation 📄
88. Documentation 📄
89. Integration Tests ✅
90. ... requests: - name: list_all method: get path: / tests: - name: status_code_is_200 assert: ${{ response.status_code == 200 }} - name: response_time_is_under_half_second assert: ${{ response.elapsed.total_seconds() < 0.5 }} - name: results_length_is_20 assert: ${{ len(response.json()["results"]) == 20 }} - name: count_is_gte_1281 assert: ${{ response.json()["count"] >= 1281 }} https://requests.readthedocs.io
91. Integration Tests ✅
92. Integration Tests ✅
93. Integration Tests ✅
94. Chaining ⛓️
95. Accessing Pokémon details dynamically GET https://pokeapi.co/api/v2/pokemon/bulbasaur
96. ... endpoints: - name: pokemon path: pokemon requests: - name: list_all method: get path: / vars: pokemon_name: ${{ response.json()["results"][0]["name"] }} tests: ... - name: details method: get path: ${pokemon_name} pokemon/${pokemon_name}
97. Chaining ⛓
98. Impact
102. https://opensource.org/maintainers/camilamaia
103. scanapi.dev Tutorial
104. EXAMPLE github.com/camilamaia/scanapi-tutorial
105. Contributing to ScanAPI
106. Join us! github.com/scanapi/scanapi/blob/main/CONTRIBUTING.md
107. OFFICE HOURS 🗓 Every 1st Friday of the month ⏰ 01:30 UTC | 10:30 BRT 📍 Online & Open to all Contribute. Learn. Connect. Your monthly space with the ScanAPI community! ✨ Live support & troubleshooting Project updates & demos Open Q&A with maintainers A friendly space to get started in Open Source 🌍 Open Source is better together. Join us and help build ScanAPI! Organized with ♥ by cumbuca.dev NEXT: 🗓 May 8th
108. Closing
109. Connect with us! x.com/scanapi_ discord.scanapi.dev/ linkedin.com/company/scanapi
110. github.com/scanapi/scanapi
111. github.com/sponsors/scanapi 💜 How to support ScanAPI 🔁 Share with friends and your network 🏢 Show it at work (if it makes sense) 🛠️ Contribute with code, ideas, feedback or improvements 💸 Support the project via GitHub Sponsors Every contribution helps make API testing more accessible 💜 Help us grow and reach more people 🚀
112. Connect with Cumbuca Dev! linktr.ee/cumbuca.dev
113. github.com/sponsors/cumbucadev Everything we build at Cumbuca Dev is free and made for the community 💜 Consider supporting us on GitHub Sponsors and help us keep creating more accessible learning experiences.
114. THANK YOU! camilamaia 👩‍💻 camilamaia.com