Restoring bf4 in travis deps, as it's required, and fixing the to_clipboard doctests problems by skipping it

Author: datapythonista

azure-pipelines.yml

@@ -91,8 +91,6 @@ jobs:
       ci/code_checks.sh doctests
     displayName: 'Running doctests'
     condition: true
-    env:
-      DISPLAY: ":99.0"  # required by to_clipboard doctests
 
   - script: |
       export PATH=$HOME/miniconda3/bin:$PATH

ci/code_checks.sh

@@ -185,7 +185,7 @@ if [[ -z "$CHECK" || "$CHECK" == "doctests" ]]; then
 
     MSG='Doctests generic.py' ; echo $MSG
     pytest -v --doctest-modules pandas/core/generic.py \
-        -k"-_set_axis_name -_xs -describe -droplevel -groupby -interpolate -pct_change -pipe -reindex -reindex_axis -to_json -transpose -values -xs"
+        -k"-_set_axis_name -_xs -describe -droplevel -groupby -interpolate -pct_change -pipe -reindex -reindex_axis -to_json -transpose -values -xs -to_clipboard"
     RET=$(($RET + $?)) ; echo $MSG "DONE"
 
     MSG='Doctests top-level reshaping functions' ; echo $MSG

ci/deps/travis-36.yaml

@@ -3,6 +3,7 @@ channels:
   - defaults
   - conda-forge
 dependencies:
+  - beautifulsoup4
   - cython>=0.28.2
   - dask
   - fastparquet