Resolves issue with build related to pyyaml (#2130)
Resolves issue with build related to pyyaml (#2130)

* Resolves issue with Build. Specified pyyaml version that is compatible with google-cloud-dataflow within conda create for python 2.

* Resolving original version issue. Should have been 3.13, not 2.13.

googledatalab/datalab,googledatalab/datalab,googledatalab/datalab,googledatalab/datalab,googledatalab/datalab,googledatalab/datalab