Clean-up and remove py3.10 from travis until it works

.travis.yml

@@ -1,9 +1,7 @@
 language: python
-matrix:
-    include:
-      - python: "3.8"
-      - python: "3.9"
-      - python: "3.10"
+python:
+  - "3.8"
+  - "3.9"
 
 install:
   - "pip install blist"

setup.py

@@ -64,8 +64,8 @@
         # that you indicate whether you support Python 2, Python 3 or both.
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
-		'Programming Language :: Python :: 3.9',
-		'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.9',
+        'Programming Language :: Python :: 3.10',
     ],
 
     # What does your project relate to?

tests/test_dropin/test_dataframe_blist.py

@@ -15,7 +15,7 @@ def check_blist():
         assert isinstance(df.index, blist)
         assert isinstance(df.columns, blist)
         assert isinstance(df.data, blist)
-        assert all([isinstance(df.data[x], blist) for x in range(len(df.columns))])
+        assert all(isinstance(df.data[x], blist) for x in range(len(df.columns)))
 
     df = rc.DataFrame(dropin=blist)
     assert isinstance(df, rc.DataFrame)
@@ -162,7 +162,7 @@ def test_data_blist():
     actual = rc.DataFrame({'a': [1, 2, 3], 'b': [4, 5, 6]}, index=['a', 'b', 'c'], columns=['b', 'a'],
                           dropin=blist)
     assert actual.data == [[4, 5, 6], [1, 2, 3]]
-    assert all([isinstance(actual.data[x], blist) for x in range(len(actual.columns))])
+    assert all(isinstance(actual.data[x], blist) for x in range(len(actual.columns)))
 
 
 def test_default_empty_init():
@@ -174,7 +174,7 @@ def test_default_empty_init():
     assert isinstance(actual.index, blist)
     assert isinstance(actual.columns, blist)
     assert isinstance(actual.data, blist)
-    assert all([isinstance(actual.data[x], blist) for x in range(len(actual.columns))])
+    assert all(isinstance(actual.data[x], blist) for x in range(len(actual.columns)))
 
 
 def test_sort_index():