Possibly Circular Import Error in `small_time`

[josiahls]

Describe the bug
pixi run mojo package lightbug_http/ fails.

Getting bizaar cannot be converted from 'SmallTime' to 'SmallTime' and cannot be converted from 'TimeZone' to 'TimeZone'

This is giving "circular import issue" vibes.

I'm happy to work on a PR to untangle this.

To Reproduce

pixi run mojo package lightbug_http/
Included from /home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/__init__.mojo:1:
/home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/small_time.mojo:292:20: error: no matching function in call to 'strptime'
    return strptime(date_str, fmt, time_zone.from_utc(tz_str))
           ~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Included from /home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/__init__.mojo:1:
/home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/small_time.mojo:243:4: note: candidate not viable: argument #2 cannot be converted from 'TimeZone' to 'TimeZone'
fn strptime(date_str: String, fmt: String, tzinfo: TimeZone = TimeZone()) raises -> SmallTime:
   ^
Included from /home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/__init__.mojo:1:
/home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/small_time.mojo:270:4: note: candidate not viable: argument #2 cannot be converted from 'TimeZone' to 'String'
fn strptime(date_str: String, fmt: String, tz_str: String) raises -> SmallTime:
   ^
Included from /home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/__init__.mojo:1:
/home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/small_time.mojo:448:32: error: invalid call to 'format': method argument #0 cannot be converted from 'SmallTime' to 'SmallTime'
        return formatter.format(self, fmt)
               ~~~~~~~~~~~~~~~~^~~~~~~~~~~
Included from /home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/__init__.mojo:1:
Included from /home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/small_time.mojo:7:
/home/mojo_user/ash_dynamics/lightbug_http/lightbug_http/external/small_time/formatter.mojo:83:8: note: function declared here
    fn format(self, m: SmallTime, fmt: String) -> String:

Expected behavior
I propose eliminating the circular imports with a combination of Traits and __extension

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

System
------------
       Pixi version: 0.59.0
           Platform: linux-64
   Virtual packages: __unix=0=0
                   : __linux=6.8.0=0
                   : __glibc=2.35=0
                   : __archspec=1=piledriver
          Cache dir: /home/mojo_user/.cache/rattler/cache
       Auth storage: /home/mojo_user/.rattler/credentials.json
   Config locations: No config files found

Global
------------
            Bin dir: /home/mojo_user/.pixi/bin
    Environment dir: /home/mojo_user/.pixi/envs
       Manifest dir: /home/mojo_user/.pixi/manifests/pixi-global.toml

Workspace
------------
               Name: lightbug_http
            Version: 0.25.7
      Manifest file: /home/mojo_user/ash_dynamics/lightbug_http/pixi.toml
       Last updated: 30-11-2025 17:41:49

Environments
------------
        Environment: default
           Features: default
        Solve group: default
           Channels: conda-forge, https://conda.modular.com/max, https://repo.prefix.dev/modular-community
   Dependency count: 2
       Dependencies: mojo, rattler-build
   Target platforms: linux-64, osx-arm64, linux-aarch64
    Prefix location: /home/mojo_user/ash_dynamics/lightbug_http/.pixi/envs/default
              Tasks: publish, build, format

        Environment: unit-tests
           Features: unit-tests, default
        Solve group: default
           Channels: conda-forge, https://conda.modular.com/max, https://repo.prefix.dev/modular-community
   Dependency count: 2
       Dependencies: mojo, rattler-build
   Target platforms: osx-arm64, linux-64, linux-aarch64
    Prefix location: /home/mojo_user/ash_dynamics/lightbug_http/.pixi/envs/unit-tests
              Tasks: publish, build, format, test

        Environment: integration-tests
           Features: integration-tests, default
        Solve group: default
           Channels: conda-forge, https://conda.modular.com/max, https://repo.prefix.dev/modular-community
   Dependency count: 4
       Dependencies: requests, fastapi, mojo, rattler-build
   Target platforms: linux-64, linux-aarch64, osx-arm64
    Prefix location: /home/mojo_user/ash_dynamics/lightbug_http/.pixi/envs/integration-tests
              Tasks: publish, build, format, integration_tests_udp, integration_tests_external, integration_tests_py

        Environment: bench
           Features: bench, default
        Solve group: default
           Channels: conda-forge, https://conda.modular.com/max, https://repo.prefix.dev/modular-community
   Dependency count: 2
       Dependencies: mojo, rattler-build
   Target platforms: osx-arm64, linux-aarch64, linux-64
    Prefix location: /home/mojo_user/ash_dynamics/lightbug_http/.pixi/envs/bench
              Tasks: publish, build, format, bench_server, bench

Smartphone (please complete the following information):

• Device: [e.g. iPhone6]
• OS: [e.g. iOS8.1]
• Browser [e.g. stock browser, safari]
• Version [e.g. 22]

Additional context
Add any other context about the problem here.