Potential dependency conflicts between ChannelBreakoutBot and urllib3

[NeolithEra]

Hi, as shown in the following full dependency graph of ChannelBreakoutBot, ChannelBreakoutBot requires urllib3 (the latest version), while the installed version of requests(2.22.0) requires urllib3>=1.21.1,<1.26.

According to Pip's “first found wins” installation strategy, urllib3 1.25.3 is the actually installed version.

Although the first found package version urllib3 1.25.3 just satisfies the later dependency constraint （urllib3>=1.21.1,<1.26), it will lead to a build failure once developers release a newer version of urllib3.

Dependency tree--------

ChannelBreakoutBot(version range:)
| +-hyperopt(version range:)
| +-matplotlib(version range:)
| +-networkx(version range:==1.11)
| +-numpy(version range:)
| +-pandas(version range:)
| +-pubnub(version range:)
| | +-pycryptodomex(version range:>=3.3)
| | +-requests(version range:>=2.4)
| | | +-chardet(version range:>=3.0.2,<3.1.0)
| | | +-idna(version range:>=2.5,<2.9)
| | | +-urllib3(version range:>=1.21.1,<1.26)
| | | +-certifi(version range:>=2017.4.17)
| | +-six(version range:>=1.10)
| +-requests(version range:)
| | +-chardet(version range:>=3.0.2,<3.1.0)
| | +-idna(version range:>=2.5,<2.9)
| | +-urllib3(version range:>=1.21.1,<1.26)
| | +-certifi(version range:>=2017.4.17)
| +-six(version range:)
| +-tornado(version range:)
| +-urllib3(version range:)
| +-websocket-client(version range:)

Thanks for your attention. Best, Neolith

[NeolithEra]

Solution

1. Fix your direct dependencies to be urllib3>=1.21.1,<1.26 and requests==2.22.0, to remove this conflict. I have checked this revision will not affect your downstream projects now.

2. Remove your direct dependency urllib3, and use the library urllib3 transitively introduced by requests.

Personally, I prefer solution 2. What's your opinion?

@Connie-Wild May I pull a request to solve this issue?