CI: Check for accidental imports

Author: TomAugspurger

.travis.yml

@@ -121,6 +121,8 @@ script:
   - ci/script_single.sh
   - ci/script_multi.sh
   - ci/lint.sh
+  - echo "checking imports"
+  - python ci/check_imports.py
   - echo "script done"
 
 after_success:

scripts/check_imports.py renamed to ci/check_imports.py

@@ -3,14 +3,22 @@
 """
 import sys
 
-
 blacklist = {
+    'bs4',
+    'html5lib',
+    'jinja2'
+    'lxml',
     'matplotlib',
     'numexpr',
-    'xlsxwriter',
     'openpyxl',
+    'py',
+    'pytest',
+    's3fs',
+    'scipy',
+    'tables',
+    'xlrd',
+    'xlsxwriter',
     'xlwt',
-    'numexpr',
 }