Delete unused args argument from main() in Python files

Open Beginner friendly

#467 opened on Sep 23, 2026 0 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 2/5
Estimated time: 1-3 hours
Newbie friendliness: 80/100

Issue type: Refactor
Clarity: Clearly specified
Activity status: Active
Tech stack: python
Domain: cli, tooling

Research direction

The issue lists 30 Python files under rclpy/actions, rclpy/executors, rclpy/guard_conditions, rclpy/services, and rclpy/topics. In each file, locate the main() function definition and change its signature from def main(args=None): to def main():. Then find the call to rclpy.init(args=args) and change it to rclpy.init(). Run the examples to ensure they still start correctly.

Written by the indexing model from the issue text.

Description

good first issue

These files define main(args=None) and pass args to rclpy.init(args=args). However, nothing ever calls main() with an args argument, so this parameter does nothing.

Modify the following files to delete the args argument from main() (so the signature is def main():) and call rclpy.init() without passing args:

rclpy/actions/minimal_action_client/examples_rclpy_minimal_action_client/client.py
rclpy/actions/minimal_action_client/examples_rclpy_minimal_action_client/client_asyncio.py
rclpy/actions/minimal_action_client/examples_rclpy_minimal_action_client/client_cancel.py
rclpy/actions/minimal_action_client/examples_rclpy_minimal_action_client/client_not_composable.py
rclpy/actions/minimal_action_server/examples_rclpy_minimal_action_server/server.py
rclpy/actions/minimal_action_server/examples_rclpy_minimal_action_server/server_defer.py
rclpy/actions/minimal_action_server/examples_rclpy_minimal_action_server/server_not_composable.py
rclpy/actions/minimal_action_server/examples_rclpy_minimal_action_server/server_queue_goals.py
rclpy/actions/minimal_action_server/examples_rclpy_minimal_action_server/server_single_goal.py
rclpy/executors/examples_rclpy_executors/callback_group.py
rclpy/executors/examples_rclpy_executors/composed.py
rclpy/executors/examples_rclpy_executors/custom_callback_group.py
rclpy/executors/examples_rclpy_executors/custom_executor.py
rclpy/executors/examples_rclpy_executors/listener.py
rclpy/executors/examples_rclpy_executors/talker.py
rclpy/guard_conditions/examples_rclpy_guard_conditions/trigger_guard_condition.py
rclpy/services/minimal_client/examples_rclpy_minimal_client/client.py
rclpy/services/minimal_client/examples_rclpy_minimal_client/client_async.py
rclpy/services/minimal_client/examples_rclpy_minimal_client/client_async_callback.py
rclpy/services/minimal_client/examples_rclpy_minimal_client/client_async_member_function.py
rclpy/services/minimal_service/examples_rclpy_minimal_service/service.py
rclpy/services/minimal_service/examples_rclpy_minimal_service/service_member_function.py
rclpy/topics/minimal_publisher/examples_rclpy_minimal_publisher/publisher_local_function.py
rclpy/topics/minimal_publisher/examples_rclpy_minimal_publisher/publisher_member_function.py
rclpy/topics/minimal_publisher/examples_rclpy_minimal_publisher/publisher_member_function_with_wait_for_all_acked.py
rclpy/topics/minimal_publisher/examples_rclpy_minimal_publisher/publisher_old_school.py
rclpy/topics/minimal_subscriber/examples_rclpy_minimal_subscriber/subscriber_lambda.py
rclpy/topics/minimal_subscriber/examples_rclpy_minimal_subscriber/subscriber_member_function.py
rclpy/topics/minimal_subscriber/examples_rclpy_minimal_subscriber/subscriber_old_school.py
rclpy/topics/pointcloud_publisher/examples_rclpy_pointcloud_publisher/pointcloud_publisher.py

Dominant language: C++
Stars: 970
Forks: 365
Avg merge: 12d 20h
Merged PRs (30d): 1

Contributor guide

Open the contributing guide

First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

Similar issues

[CI] Nightly Clang build broken: structured binding captured in a lambda in FileDataSource.cpp Open

bug build

Difficulty 1/5 Under an hour Newbie friendliness 91/100

facebookincubator/velox#19194 · Opened Sep 24, 2026
JIT-compiled number -> Decimal conversion silently overflows instead of raising DECIMAL_OVERFLOW Open

fuzz

Difficulty 2/5 1-3 hours Newbie friendliness 82/100

ClickHouse/ClickHouse#122114 · Opened Sep 24, 2026
Vulkan handle arena size is not configurable from CMake (OpenGL and Metal are) Open

Difficulty 2/5 1-3 hours Newbie friendliness 84/100

google/filament#10473 · Opened Sep 24, 2026
macOS source upgrades cannot detect the existing agent installation Open

module/agent platform/macos type/bug/regression

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

wazuh/wazuh#39623 · Opened Sep 24, 2026
[PyCDE] TypeAlias should forward field lookup to the aliased type Open

enhancement PyCDE

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

llvm/circt#11173 · Opened Sep 24, 2026

More C++ issues