Add a script to test imports

Author: TomAugspurger

scripts/check_imports.py

@@ -0,0 +1,27 @@
+"""
+Check that certain modules are not loaded by `import pandas`
+"""
+import sys
+
+
+blacklist = {
+    'matplotlib',
+    'numexpr',
+    'xlsxwriter',
+    'openpyxl',
+    'xlwt',
+    'numexpr',
+}
+
+
+def main():
+    import pandas  # noqa
+
+    modules = set(x.split('.')[0] for x in sys.modules)
+    imported = modules & blacklist
+    if modules & blacklist:
+        sys.exit("Imported {}".format(imported))
+
+
+if __name__ == '__main__':
+    main()