Remove future statements (#3194)

* remove future statements

* add commented out pyupgrade

* add py3-only & keep-percent to pyupgrade config

* add isort to commented out hooks

* add a couple of items to isort config

Author: max-sixty

.pre-commit-config.yaml

@@ -10,3 +10,16 @@ repos:
     rev: v2.2.3
     hooks:
       - id: flake8
+  # run these occasionally, ref discussion https://github.com/pydata/xarray/pull/3194
+  # - repo: https://github.com/asottile/pyupgrade
+  #   rev: v1.22.1
+  #   hooks:
+  #     - id: pyupgrade
+  #       args:
+  #         - "--py3-only"
+  #         # remove on f-strings in Py3.7
+  #         - "--keep-percent-format"
+  # - repo: https://github.com/timothycrosley/isort
+  #   rev: 4.3.21-2
+  #   hooks:
+  #     - id: isort

asv_bench/benchmarks/__init__.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import itertools
 
 import numpy as np

asv_bench/benchmarks/dataarray_missing.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import pandas as pd
 
 import xarray as xr

asv_bench/benchmarks/dataset_io.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import os
 
 import numpy as np

asv_bench/benchmarks/indexing.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import numpy as np
 import pandas as pd
 

asv_bench/benchmarks/interp.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import numpy as np
 import pandas as pd
 

asv_bench/benchmarks/reindexing.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import numpy as np
 
 import xarray as xr

asv_bench/benchmarks/rolling.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import numpy as np
 import pandas as pd
 

asv_bench/benchmarks/unstacking.py

@@ -1,5 +1,3 @@
-from __future__ import absolute_import, division, print_function
-
 import numpy as np
 
 import xarray as xr

doc/conf.py

@@ -11,7 +11,7 @@
 #
 # All configuration values have a default; values that are commented out
 # serve to show the default.
-from __future__ import absolute_import, division, print_function
+
 
 import datetime
 import os
@@ -262,11 +262,11 @@
 
 latex_elements = {
     # The paper size ('letterpaper' or 'a4paper').
-    #'papersize': 'letterpaper',
+    # 'papersize': 'letterpaper',
     # The font size ('10pt', '11pt' or '12pt').
-    #'pointsize': '10pt',
+    # 'pointsize': '10pt',
     # Additional stuff for the LaTeX preamble.
-    #'preamble': '',
+    # 'preamble': '',
 }
 
 # Grouping the document tree into LaTeX files. List of tuples

doc/gallery/plot_cartopy_facetgrid.py

@@ -14,7 +14,6 @@
 .. _this discussion: https://github.com/pydata/xarray/issues/1397#issuecomment-299190567
 """  # noqa
 
-from __future__ import division
 
 import cartopy.crs as ccrs
 import matplotlib.pyplot as plt

setup.cfg

@@ -30,6 +30,8 @@ exclude=
     doc
 
 [isort]
+default_section=THIRDPARTY
+known_first_party=xarray
 multi_line_output=3
 include_trailing_comma=True
 force_grid_wrap=0

versioneer.py

@@ -277,7 +277,6 @@
 
 """
 
-from __future__ import print_function
 
 import errno
 import json