[DO NOT MERGE]De-javafy the Python Metrics API

[AnandInguva]

No description provided.

[codecov]

Codecov Report

Merging #15919 (9c7cc58) into master (213bb78) will increase coverage by 9.02%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #15919      +/-   ##
==========================================
+ Coverage   74.60%   83.62%   +9.02%     
==========================================
  Files         640      445     -195     
  Lines       80839    61384   -19455     
==========================================
- Hits        60307    51331    -8976     
+ Misses      19563    10053    -9510     
+ Partials      969        0     -969     

Impacted Files	Coverage Δ
...hon/apache_beam/examples/wordcount_with_metrics.py	25.00% <0.00%> (-0.81%)	⬇️
sdks/python/apache_beam/utils/interactive_utils.py	92.68% <0.00%> (-2.44%)	⬇️
sdks/python/apache_beam/internal/metrics/metric.py	90.00% <0.00%> (-1.00%)	⬇️
...hon/apache_beam/runners/worker/bundle_processor.py	93.14% <0.00%> (-0.50%)	⬇️
sdks/python/apache_beam/runners/common.py	89.98% <0.00%> (-0.30%)	⬇️
sdks/python/apache_beam/transforms/util.py	95.86% <0.00%> (-0.17%)	⬇️
sdks/go/pkg/beam/transforms/stats/min_switch.go
sdks/go/pkg/beam/core/graph/scope.go
sdks/go/pkg/beam/core/runtime/graphx/dataflow.go
sdks/go/pkg/beam/core/runtime/exec/translate.go
... and 191 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 213bb78...9c7cc58. Read the comment docs.

[AnandInguva]

Run Python 3.8 PostCommit

[robertwb]

Is this a proposal for what an API could look like?

[AnandInguva]

Is this a proposal for what an API could look like?

@robertwb Yes, it would be a new API for metrics. We need to write the metrics API in pythonic way

[aaltay]

If this is work in progress, could you add WIP / draft to the subject please?