Do not turn Python warnings into errors in tox

Author: jsh9

tox.ini

@@ -19,10 +19,12 @@ commands =
     pip install -e .[d]
     coverage erase
     pytest tests --run-optional no_jupyter \
+        --pythonwarnings=default \
         !ci: --numprocesses auto \
         --cov {posargs}
     pip install -e .[jupyter]
     pytest tests --run-optional jupyter \
+        --pythonwarnings=default \
         -m jupyter \
         !ci: --numprocesses auto \
         --cov --cov-append {posargs}
@@ -40,11 +42,13 @@ deps =
 commands =
     pip install -e .[d]
     pytest tests \
+        --pythonwarnings=default \
         --run-optional no_jupyter \
         !ci: --numprocesses auto \
         ci: --numprocesses 1
     pip install -e .[jupyter]
     pytest tests --run-optional jupyter \
+        --pythonwarnings=default \
         -m jupyter \
         !ci: --numprocesses auto \
         ci: --numprocesses 1
@@ -66,12 +70,14 @@ commands =
     pip install -e .[d]
     coverage erase
     pytest tests \
+        --pythonwarnings=default \
         --run-optional no_jupyter \
         !ci: --numprocesses auto \
         ci: --numprocesses 1 \
         --cov {posargs}
     pip install -e .[jupyter]
     pytest tests --run-optional jupyter \
+        --pythonwarnings=default \
         -m jupyter \
         !ci: --numprocesses auto \
         ci: --numprocesses 1 \