CI: Fixing possible bugs in the CI

ci/azure/linux.yml

@@ -15,7 +15,7 @@ jobs:
         CONDA_ENV: pandas
         TEST_ARGS: "--skip-slow --skip-network"
 
-      py36_locale:
+      py37_locale:
         ENV_FILE: ci/deps/azure-37-locale.yaml
         CONDA_PY: "37"
         CONDA_ENV: pandas
@@ -27,6 +27,7 @@ jobs:
         CONDA_PY: "36"
         CONDA_ENV: pandas
         TEST_ARGS: "--only-slow --skip-network"
+        LOCALE_OVERRIDE: "it_IT.UTF-8"
 
   steps:
     - script: |

ci/deps/azure-37-locale.yaml

@@ -18,7 +18,7 @@ dependencies:
   - pymysql
   - pytables
   - python-dateutil
-  - python=3.6*
+  - python=3.7*
   - pytz
   - s3fs
   - scipy
@@ -30,6 +30,6 @@ dependencies:
   # universal
   - pytest
   - pytest-xdist
-  - moto
   - pip:
     - hypothesis>=3.58.0
+    - moto  # latest moto in conda-forge fails with 3.7, move to conda dependencies when this is fixed

ci/script_multi.sh

@@ -6,6 +6,7 @@ source activate pandas
 
 if [ -n "$LOCALE_OVERRIDE" ]; then
     export LC_ALL="$LOCALE_OVERRIDE";
+    export LANG="$LOCALE_OVERRIDE";
     echo "Setting LC_ALL to $LOCALE_OVERRIDE"
 
     pycmd='import pandas; print("pandas detected console encoding: %s" % pandas.get_option("display.encoding"))'
@@ -32,8 +33,12 @@ elif [ "$COVERAGE" ]; then
 
 elif [ "$SLOW" ]; then
     TEST_ARGS="--only-slow --skip-network"
-    echo pytest -m "not single and slow" -v --durations=10 --junitxml=test-data-multiple.xml --strict $TEST_ARGS pandas
-    pytest      -m "not single and slow" -v --durations=10 --junitxml=test-data-multiple.xml --strict $TEST_ARGS pandas
+    # The `-m " and slow"` is redundant here, as `--only-slow` is already used (via $TEST_ARGS). But is needed, because with
+    # `--only-slow` fast tests are skipped, but each of them is printed in the log (which can be avoided with `-q`),
+    # and also added to `test-data-multiple.xml`, and then printed in the log in the call to `ci/print_skipped.py`.
+    # Printing them to the log makes the log exceed the maximum size allowed by Travis and makes the build fail.
+    echo pytest -n 2 -m "not single and slow" --durations=10 --junitxml=test-data-multiple.xml --strict $TEST_ARGS pandas
+    pytest      -n 2 -m "not single and slow" --durations=10 --junitxml=test-data-multiple.xml --strict $TEST_ARGS pandas
 
 else
     echo pytest -n 2 -m "not single" --durations=10 --junitxml=test-data-multiple.xml --strict $TEST_ARGS pandas

pandas/tests/io/test_excel.py

@@ -1,31 +1,31 @@
-# pylint: disable=E1101
-import os
-import warnings
-from datetime import datetime, date, time, timedelta
+from collections import OrderedDict
+import contextlib
+from datetime import date, datetime, time, timedelta
 from distutils.version import LooseVersion
 from functools import partial
+import os
+import warnings
 from warnings import catch_warnings
-from collections import OrderedDict
 
 import numpy as np
-import pytest
 from numpy import nan
+import pytest
 
-import pandas as pd
-import pandas.util.testing as tm
+from pandas.compat import PY36, BytesIO, iteritems, map, range, u
 import pandas.util._test_decorators as td
+
+import pandas as pd
 from pandas import DataFrame, Index, MultiIndex, Series
-from pandas.compat import u, range, map, BytesIO, iteritems, PY36
-from pandas.core.config import set_option, get_option
+from pandas.core.config import get_option, set_option
+import pandas.util.testing as tm
+from pandas.util.testing import ensure_clean, makeCustomDataframe as mkdf
+
 from pandas.io.common import URLError
 from pandas.io.excel import (
-    ExcelFile, ExcelWriter, read_excel, _XlwtWriter, _OpenpyxlWriter,
-    register_writer, _XlsxWriter
-)
+    ExcelFile, ExcelWriter, _OpenpyxlWriter, _XlsxWriter, _XlwtWriter,
+    read_excel, register_writer)
 from pandas.io.formats.excel import ExcelFormatter
 from pandas.io.parsers import read_csv
-from pandas.util.testing import ensure_clean, makeCustomDataframe as mkdf
-
 
 _seriesd = tm.getSeriesData()
 _tsd = tm.getTimeSeriesData()
@@ -36,6 +36,20 @@
 _mixed_frame['foo'] = 'bar'
 
 
+@contextlib.contextmanager
+def ignore_xlrd_time_clock_warning():
+    """
+    Context manager to ignore warnings raised by the xlrd library,
+    regarding the deprecation of `time.clock` in Python 3.7.
+    """
+    with warnings.catch_warnings():
+        warnings.filterwarnings(
+            action='ignore',
+            message='time.clock has been deprecated',
+            category=DeprecationWarning)
+        yield
+
+
 @td.skip_if_no('xlrd', '1.0.0')
 class SharedItems(object):
 
@@ -114,20 +128,23 @@ def test_usecols_int(self, ext):
         # usecols as int
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
-            df1 = self.get_exceldf("test1", ext, "Sheet1",
-                                   index_col=0, usecols=3)
+            with ignore_xlrd_time_clock_warning():
+                df1 = self.get_exceldf("test1", ext, "Sheet1",
+                                       index_col=0, usecols=3)
 
         # usecols as int
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
-            df2 = self.get_exceldf("test1", ext, "Sheet2", skiprows=[1],
-                                   index_col=0, usecols=3)
+            with ignore_xlrd_time_clock_warning():
+                df2 = self.get_exceldf("test1", ext, "Sheet2", skiprows=[1],
+                                       index_col=0, usecols=3)
 
         # parse_cols instead of usecols, usecols as int
         with tm.assert_produces_warning(FutureWarning,
                                         check_stacklevel=False):
-            df3 = self.get_exceldf("test1", ext, "Sheet2", skiprows=[1],
-                                   index_col=0, parse_cols=3)
+            with ignore_xlrd_time_clock_warning():
+                df3 = self.get_exceldf("test1", ext, "Sheet2", skiprows=[1],
+                                       index_col=0, parse_cols=3)
 
         # TODO add index to xls file)
         tm.assert_frame_equal(df1, df_ref, check_names=False)
@@ -145,8 +162,9 @@ def test_usecols_list(self, ext):
                                index_col=0, usecols=[0, 2, 3])
 
         with tm.assert_produces_warning(FutureWarning):
-            df3 = self.get_exceldf('test1', ext, 'Sheet2', skiprows=[1],
-                                   index_col=0, parse_cols=[0, 2, 3])
+            with ignore_xlrd_time_clock_warning():
+                df3 = self.get_exceldf('test1', ext, 'Sheet2', skiprows=[1],
+                                       index_col=0, parse_cols=[0, 2, 3])
 
         # TODO add index to xls file)
         tm.assert_frame_equal(df1, dfref, check_names=False)
@@ -165,8 +183,9 @@ def test_usecols_str(self, ext):
                                index_col=0, usecols='A:D')
 
         with tm.assert_produces_warning(FutureWarning):
-            df4 = self.get_exceldf('test1', ext, 'Sheet2', skiprows=[1],
-                                   index_col=0, parse_cols='A:D')
+            with ignore_xlrd_time_clock_warning():
+                df4 = self.get_exceldf('test1', ext, 'Sheet2', skiprows=[1],
+                                       index_col=0, parse_cols='A:D')
 
         # TODO add index to xls, read xls ignores index name ?
         tm.assert_frame_equal(df2, df1, check_names=False)
@@ -618,8 +637,9 @@ def test_sheet_name_and_sheetname(self, ext):
         df1 = self.get_exceldf(filename, ext,
                                sheet_name=sheet_name, index_col=0)  # doc
         with tm.assert_produces_warning(FutureWarning, check_stacklevel=False):
-            df2 = self.get_exceldf(filename, ext, index_col=0,
-                                   sheetname=sheet_name)  # backward compat
+            with ignore_xlrd_time_clock_warning():
+                df2 = self.get_exceldf(filename, ext, index_col=0,
+                                       sheetname=sheet_name)  # backward compat
 
         excel = self.get_excelfile(filename, ext)
         df1_parse = excel.parse(sheet_name=sheet_name, index_col=0)  # doc

setup.cfg

@@ -200,7 +200,6 @@ skip=
     pandas/tests/io/test_parquet.py,
     pandas/tests/io/generate_legacy_storage_files.py,
     pandas/tests/io/test_common.py,
-    pandas/tests/io/test_excel.py,
     pandas/tests/io/test_feather.py,
     pandas/tests/io/test_s3.py,
     pandas/tests/io/test_html.py,