Potential dependency conflicts between airqinsight and typing

[NeolithEra]

Hi, as shown in the following full dependency graph of airqinsight, airqinsight requires typing (the latest version)， while the installed version of airQ(0.3.3) requires typing==3.7.4.1.

According to Pip's “first found wins” installation strategy, typing 3.7.4.1 is the actually installed version.

Although the first found package version typing 3.7.4.1 just satisfies the later dependency constraint （typing==3.7.4.1), it will lead to a build failure once developers release a newer version of typing.

Dependency tree--------

airqinsight  - 0.2.5
| +- airQ(install version:0.3.3 version range:*)
| | +- requests(install version:2.21.0 version range:==2.21.0)
| | | +- certifi(install version:2020.4.5.1 version range:>=2017.4.17)
| | | +- chardet(install version:3.0.4 version range:<3.1.0,>=3.0.2)
| | | +- idna(install version:2.8 version range:>=2.5,<2.9)
| | | +- urllib3(install version:1.24.3 version range:>=1.21.1,<1.25)
| | +- typing(install version:3.7.4.1 version range:==3.7.4.1)
| +- matplotlib(install version:3.2.1 version range:*)
| | +- cycler(install version:0.10.0 version range:>=0.10)
| | | +- six(install version:1.14.0 version range:*)
| | +- kiwisolver(install version:1.2.0 version range:>=1.0.1)
| | +- numpy(install version:1.18.2 version range:>=1.11)
| | +- pyparsing(install version:3.0.0a1 version range:>=2.0.1)
| | +- python-dateutil(install version:2.8.1 version range:>=2.1)
| +- typing(install version:3.7.4.1 version range:*)

Thanks for your attention.
Best,
Neolith

[NeolithEra]

Solution

1. Loosen the version range of typing to be <=3.7.4.1.
2. Remove your direct dependency typing, and use the typing transitively introduced by airQ.
3. Ask your direct dependency airQ to loosen the version range of typing to be >=3.7.4.1.
   @itzmeanjan Which solution do you prefer, 1 ,2 or 3?
   Please let me know your choice. May I pull a request to solve this issue?

[NeolithEra]

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