Installation fails due to conflicting cloudpickle version

[NeolithEra]

Hi, users are unable to run Tensor2tensor due to dependency conflict with cloudpickle package. As shown in the following full dependency graph of Tensor2tensor, gym requires ** cloudpickle~=1.2.0**，while tensorflow-probability requires ** cloudpickle >0.6.1 **.

According to pip’s “first found wins” installation strategy, cloudpickle 1.4.1 is the actually installed version. However, cloudpickle 1.4.1 does not satisfy cloudpickle~=1.2.0.

Dependency tree-----------

tensor2tensor  - 1.15.5
| +- absl-py(install version:0.9.0 version range:*)
| +- bz2file(install version:0.98 version range:*)
| +- dopamine-rl(install version:3.0.1 version range:*)
| | +- absl-py (install version:0.9.0 version range:>=0.2.2)
| | +- gin-config (install version:0.3.0 version range:>=0.1.1)
| | | +- six (install version:1.14.0 version range:>=1.10.0)
| | +- gym (install version:0.14.0 version range:>=0.10.5)
| | | +- cloudpickle(install version:1.3.0 version range:>=1.2.0,<1.4.0)
| | | +- enum34(install version: version range:<.2,>=1.1.6)
| | | +- numpy(install version:1.18.2 version range:>=1.10.4)
| | | +- pyglet(install version:1.5.0 version range:>=1.4.0,<=1.5.0)
| | | +- scipy(install version:1.2.3 version range:*)
| | | +- six(install version:1.14.0 version range:*)
| | +- opencv-python (install version:4.1.0.25 version range:>=3.4.1.15)
| | +- Pillow (install version:7.1.1 version range:>=5.4.1)
| +- flask(install version:1.1.2 version range:*)
| | +- click(install version:7.1.1 version range:>=5.1)
| | +- itsdangerous(install version:1.1.0 version range:>=0.24)
| | +- Jinja2(install version:2.11.2 version range:>=2.10.1)
| | | +- MarkupSafe(install version:2.0.0a1 version range:>=0.23)
| | +- Werkzeug(install version:1.0.1 version range:>=0.15)
| +- future(install version:0.18.2 version range:*)
| +- gevent(install version:1.5.0 version range:*)
| +- gin-config(install version:0.3.0 version range:*)
| | +- six (install version:1.14.0 version range:>=1.10.0)
| +- google-api-python-client(install version:1.8.0 version range:*)
| | +- google-api-core(install version:1.17.0 version range:>=1.13.0,<2dev)
| | +- google-auth(install version:1.14.0 version range:>=1.4.1)
| | | +- cachetools(install version:4.1.0 version range:>=2.0.0,<5.0)
| | | +- pyasn1-modules(install version:0.2.8 version range:>=0.2.1)
| | | +- rsa(install version:4.0 version range:>=3.1.4,<4.1)
| | | | +- pyasn1(install version:0.4.8 version range:>=0.1.3)
| | | +- setuptools(install version:46.1.3 version range:>=40.3.0)
| | | +- six(install version:1.14.0 version range:>=1.9.0)
| | +- google-auth-httplib2(install version:0.0.3 version range:>=0.0.3)
| | | +- google-auth(install version:1.14.0 version range:*)
| | | | +- cachetools(install version:4.1.0 version range:>=2.0.0,<5.0)
| | | | +- pyasn1-modules(install version:0.2.8 version range:>=0.2.1)
| | | | +- rsa(install version:4.0 version range:>=3.1.4,<4.1)
| | | | +- setuptools(install version:46.1.3 version range:>=40.3.0)
| | | | +- six(install version:1.14.0 version range:>=1.9.0)
| | | +- httplib2(install version:0.17.2 version range:>=0.9.1)
| | +- httplib2(install version:0.18.1 version range:>=0.9.2,<1dev)
| | +- six(install version:1.14.0 version range:>=1.6.1,<2dev)
| | +- uritemplate(install version:3.0.1 version range:>=3.0.0,<4dev)
| +- gunicorn(install version:20.0.4 version range:*)
| | +- setuptools(install version:46.1.3 version range:>=3.0)
| +- gym(install version:0.14.0 version range:==0.14.0)
| | +- cloudpickle(install version:1.3.0 version range:>=1.2.0,<1.4.0)
| | +- enum34(install version: version range:<.2,>=1.1.6)
| | +- numpy(install version:1.18.2 version range:>=1.10.4)
| | +- pyglet(install version:1.5.0 version range:>=1.4.0,<=1.5.0)
| | +- scipy(install version:1.2.3 version range:*)
| | +- six(install version:1.14.0 version range:*)
| +- h5py(install version:2.10.0 version range:*)
| +- kfac(install version:0.2.0 version range:*)
| | +- numpy(install version:1.18.2 version range:*)
| | +- six(install version:1.14.0 version range:*)
| | +- tensorflow-probability(install version:0.7.0 version range:*)
| +- mesh-tensorflow(install version:0.1.13 version range:*)
| | +- absl-py(install version:0.9.0 version range:*)
| | +- future(install version:0.18.2 version range:*)
| | +- gin-config(install version:0.3.0 version range:*)
| | | +- six (install version:1.14.0 version range:>=1.10.0)
| | +- six(install version:1.14.0 version range:*)
| +- numpy(install version:1.18.2 version range:*)
| +- oauth2client(install version:4.1.3 version range:*)
| | +- httplib2(install version:0.17.2 version range:>=0.9.1)
| | +- pyasn1(install version:0.4.8 version range:>=0.1.7)
| | +- pyasn1-modules(install version:0.2.8 version range:>=0.0.5)
| | +- rsa(install version:4.0 version range:>=3.1.4)
| | | +- pyasn1(install version:0.4.8 version range:>=0.1.3)
| | +- six(install version:1.14.0 version range:>=1.6.1)
| +- opencv-python(install version:4.1.0.25 version range:*)
| +- Pillow(install version:7.1.1 version range:*)
| +- pypng(install version:0.0.20 version range:*)
| +- requests(install version:2.23.0 version range:*)
| | +- certifi(install version:2020.4.5.1 version range:>=2017.4.17)
| | +- chardet(install version:3.0.4 version range:>=3.0.2,<4)
| | +- idna(install version:2.9 version range:>=2.5,<3)
| | +- urllib3(install version:1.25.9 version range:>=1.21.1,<1.26)
| +- scipy(install version:1.2.3 version range:*)
| +- six(install version:1.14.0 version range:*)
| +- sympy(install version:1.5.1 version range:*)
| +- tensorflow-datasets(install version:3.0.0 version range:*)
| +- tensorflow-gan(install version:1.0.0.dev0 version range:*)
| +- tensorflow-probability(install version:0.7.0 version range:==0.7.0)
| | +- cloudpickle(install version:1.3.0 version range:>0.6.1)
| +- tqdm(install version:4.45.0 version range:*)

Thanks for your help. Best, Neolith

[NeolithEra]

Solution

1. Ask your direct dependency gym to loosen the version range of cloudpickle to be >=1.2.0. @lukaszkaiser May I pull a request to solve this issue?

[NeolithEra]

@rohan100jain,Could you help me review this issue? Thx :p