trying to get ` pants test lt single file gt ` to work Got e

Question

trying to get ` pants test lt single file gt ` to work Got errors that it can t find 3rd party libraries like sqlalchemy google protobuf factory see inside

plain-night-51324 · Answer

```Alternatively you can remove the ambiguity by deleting changing some of the targets so that only 1 target owns this module Refer to 16 10 48 37 WARN Pants cannot infer owners for the following imports in the target common application models py sqlalchemy Boolean line 8 sqlalchemy Column line 8 sqlalchemy DateTime line 8 sqlalchemy String line 8 sqlalchemy dialects postgresql JSON line 9 sqlalchemy dialects postgresql UUID line 9 sqlalchemy func line 8 If you do not expect an import to be inferrable add ` pants no infer dep` to the import line Otherwise see for common problems 16 10 48 37 WARN Pants cannot infer owners for the following imports in the target lt gt proto tfdv pb2 py google protobuf descriptor line 6 google protobuf internal enum type wrapper line 5 google protobuf message line 7 google protobuf reflection line 8 google protobuf symbol database line 9 ```

plain-night-51324 · Answer

```ImportError while loading conftest private var folders xz gwhmgmz14510pl52tgmhdl740000gn T pants sandbox YH9TnA common conftest py common conftest py 8 in lt module gt import factory E ModuleNotFoundError No module named factory ```

plain-night-51324 · Answer

I ran ` pants filter target type=python requirement list ` but don t see any 3rd party things went through this doc didn t find <https www pantsbuild org docs troubleshooting import errors and missing dependencies|anything> all my build files are up to date

broad-processor-92400 · Answer

Have you told Pants about your third party dependencies Pants requires explicit specification of what third party dependencies you re planning to use via `python requirement` or one of the generators from a `pyproject toml` or `requirements txt` and will then infer which files use them <https www pantsbuild org docs python third party dependencies> has more docs

plain-night-51324 · Answer

yes in common BUILD I have ```python sources python requirements name= reqs source= base requirements txt python requirements name= reqs0 ``` and the test is in common foo tests test foo py I also took out the first base requirements txt and to make sure and still have the same error

plain-night-51324 · Answer

I am in the failed sandbox `pants sandbox lm1s6E` saw some first party files not sure how to check if any 3rd party dependencies are installed there

broad-processor-92400 · Answer

Have you got a lockfile <https www pantsbuild org docs python third party dependencies lockfiles>

plain-night-51324 · Answer

yes

plain-night-51324 · Answer

not in sandbox only in my main repo

plain-night-51324 · Answer

``` python tailor pex binary targets = false enable resolves = true```

plain-night-51324 · Answer

I ran ``` pants dependencies common foo tests test foo py``` I get ```16 39 31 68 INFO Initializing scheduler 16 39 31 95 INFO Scheduler initialized 16 39 38 45 WARN The target common foo tests test foo py tests0 imports `grpc` but Pants cannot safely infer a dependency because more than one target owns this module so it is ambiguous which to use Please explicitly include the dependency you want in the `dependencies` field of common foo tests test foo py tests0 or ignore the ones you do not want by prefixing with ` ` or ` ` so that one or no targets are left Alternatively you can remove the ambiguity by deleting changing some of the targets so that only 1 target owns this module Refer to <https www pantsbuild org v2 14 docs troubleshooting import errors and missing dependencies> ``` so thats probably why

broad-processor-92400 · Answer

That would suggest to me that dependencies like `grpc` are being imported into pants multiple times Are they listed in multiple requirements txt files

plain-night-51324 · Answer

yes

plain-night-51324 · Answer

it s a monorepo so we have multiple requirements txt

plain-night-51324 · Answer

they all have the same version so the lockfile is able to be generated

broad-processor-92400 · Answer

I think pants general expectation is that there s a single source of dependencies across all the whole repo For example in our pants repo we have one `backend requirements txt` that specifies all dependencies and then subprojects like `backend api` and `backend whatever` that don t have their own requirements txt If you re migrating an existing codebase to pants I think you can leave the individual project `requirements txt` where they are without a `python requirements` and use to ensure ` pants tailor ` doesn t add them and have a single top level requirements txt that is imported via `python requirements` This is what we did for our migration Alternatively a path that seems to be harder would be to have a separate resolve per sub project

plain-night-51324 · Answer

Thanks thats an awesome explanation suggestion appreciate it

plain-night-51324 · Answer

I ended up removing tailor requirements targets resolve them to something other than default and use pex3 to generate a single req txt from the lockfile and use that as default