Update python

Changes:

- https://github.com/docker-library/python/commit/4baab39: Update to 3.8.0b1, pip 19.1.1

library/python

@@ -4,40 +4,40 @@ Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/python.git
 
-Tags: 3.8.0a4-stretch, 3.8-rc-stretch, rc-stretch
-SharedTags: 3.8.0a4, 3.8-rc, rc
+Tags: 3.8.0b1-stretch, 3.8-rc-stretch, rc-stretch
+SharedTags: 3.8.0b1, 3.8-rc, rc
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: f6e98ea8b8ef4e9a520e05d481d2640a35f9542c
+GitCommit: 4baab390a3ba83908b869277491c4ce2ca283373
 Directory: 3.8-rc/stretch
 
-Tags: 3.8.0a4-slim-stretch, 3.8-rc-slim-stretch, rc-slim-stretch, 3.8.0a4-slim, 3.8-rc-slim, rc-slim
+Tags: 3.8.0b1-slim-stretch, 3.8-rc-slim-stretch, rc-slim-stretch, 3.8.0b1-slim, 3.8-rc-slim, rc-slim
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: f6e98ea8b8ef4e9a520e05d481d2640a35f9542c
+GitCommit: 4baab390a3ba83908b869277491c4ce2ca283373
 Directory: 3.8-rc/stretch/slim
 
-Tags: 3.8.0a4-alpine3.9, 3.8-rc-alpine3.9, rc-alpine3.9, 3.8.0a4-alpine, 3.8-rc-alpine, rc-alpine
+Tags: 3.8.0b1-alpine3.9, 3.8-rc-alpine3.9, rc-alpine3.9, 3.8.0b1-alpine, 3.8-rc-alpine, rc-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: f6e98ea8b8ef4e9a520e05d481d2640a35f9542c
+GitCommit: 4baab390a3ba83908b869277491c4ce2ca283373
 Directory: 3.8-rc/alpine3.9
 
-Tags: 3.8.0a4-windowsservercore-ltsc2016, 3.8-rc-windowsservercore-ltsc2016, rc-windowsservercore-ltsc2016
-SharedTags: 3.8.0a4-windowsservercore, 3.8-rc-windowsservercore, rc-windowsservercore, 3.8.0a4, 3.8-rc, rc
+Tags: 3.8.0b1-windowsservercore-ltsc2016, 3.8-rc-windowsservercore-ltsc2016, rc-windowsservercore-ltsc2016
+SharedTags: 3.8.0b1-windowsservercore, 3.8-rc-windowsservercore, rc-windowsservercore, 3.8.0b1, 3.8-rc, rc
 Architectures: windows-amd64
-GitCommit: f6e98ea8b8ef4e9a520e05d481d2640a35f9542c
+GitCommit: 4baab390a3ba83908b869277491c4ce2ca283373
 Directory: 3.8-rc/windows/windowsservercore-ltsc2016
 Constraints: windowsservercore-ltsc2016
 
-Tags: 3.8.0a4-windowsservercore-1803, 3.8-rc-windowsservercore-1803, rc-windowsservercore-1803
-SharedTags: 3.8.0a4-windowsservercore, 3.8-rc-windowsservercore, rc-windowsservercore, 3.8.0a4, 3.8-rc, rc
+Tags: 3.8.0b1-windowsservercore-1803, 3.8-rc-windowsservercore-1803, rc-windowsservercore-1803
+SharedTags: 3.8.0b1-windowsservercore, 3.8-rc-windowsservercore, rc-windowsservercore, 3.8.0b1, 3.8-rc, rc
 Architectures: windows-amd64
-GitCommit: f6e98ea8b8ef4e9a520e05d481d2640a35f9542c
+GitCommit: 4baab390a3ba83908b869277491c4ce2ca283373
 Directory: 3.8-rc/windows/windowsservercore-1803
 Constraints: windowsservercore-1803
 
-Tags: 3.8.0a4-windowsservercore-1809, 3.8-rc-windowsservercore-1809, rc-windowsservercore-1809
-SharedTags: 3.8.0a4-windowsservercore, 3.8-rc-windowsservercore, rc-windowsservercore, 3.8.0a4, 3.8-rc, rc
+Tags: 3.8.0b1-windowsservercore-1809, 3.8-rc-windowsservercore-1809, rc-windowsservercore-1809
+SharedTags: 3.8.0b1-windowsservercore, 3.8-rc-windowsservercore, rc-windowsservercore, 3.8.0b1, 3.8-rc, rc
 Architectures: windows-amd64
-GitCommit: f6e98ea8b8ef4e9a520e05d481d2640a35f9542c
+GitCommit: 4baab390a3ba83908b869277491c4ce2ca283373
 Directory: 3.8-rc/windows/windowsservercore-1809
 Constraints: windowsservercore-1809