Merge branch 'test_branch'

merging latest changes

Author: Ajay Saxena

doc/source/indexing.rst

@@ -1467,6 +1467,10 @@ with duplicates dropped.
    idx1.symmetric_difference(idx2)
    idx1 ^ idx2
 
+.. note::
+
+   The resulting index from a set operation will be sorted in ascending order.
+
 Missing values
 ~~~~~~~~~~~~~~
 

doc/source/whatsnew/v0.20.0.txt

@@ -30,7 +30,7 @@ New features
 Other enhancements
 ^^^^^^^^^^^^^^^^^^
 
-
+- ``pd.read_excel`` now preserves sheet order when using ``sheetname=None`` (:issue:`9930`)
 
 
 .. _whatsnew_0200.api_breaking:

pandas/io/clipboard.py

@@ -3,12 +3,16 @@
 from pandas.compat import StringIO, PY2
 
 
-def read_clipboard(**kwargs):  # pragma: no cover
-    """
+def read_clipboard(sep='\s+', **kwargs):  # pragma: no cover
+    r"""
     Read text from clipboard and pass to read_table. See read_table for the
     full argument list
 
-    If unspecified, `sep` defaults to '\s+'
+    Parameters
+    ----------
+    sep : str, default '\s+'.
+        A string or regex delimiter. The default of '\s+' denotes
+        one or more whitespace characters.
 
     Returns
     -------
@@ -37,7 +41,7 @@ def read_clipboard(**kwargs):  # pragma: no cover
         except:
             pass
 
-    # Excel copies into clipboard with \t seperation
+    # Excel copies into clipboard with \t separation
     # inspect no more then the 10 first lines, if they
     # all contain an equal number (>0) of tabs, infer
     # that this came from excel and set 'sep' accordingly
@@ -51,12 +55,12 @@ def read_clipboard(**kwargs):  # pragma: no cover
 
     counts = set([x.lstrip().count('\t') for x in lines])
     if len(lines) > 1 and len(counts) == 1 and counts.pop() != 0:
-        kwargs['sep'] = '\t'
+        sep = '\t'
 
-    if kwargs.get('sep') is None and kwargs.get('delim_whitespace') is None:
-        kwargs['sep'] = '\s+'
+    if sep is None and kwargs.get('delim_whitespace') is None:
+        sep = '\s+'
 
-    return read_table(StringIO(text), **kwargs)
+    return read_table(StringIO(text), sep=sep, **kwargs)
 
 
 def to_clipboard(obj, excel=None, sep=None, **kwargs):  # pragma: no cover

pandas/io/excel.py

@@ -21,7 +21,7 @@
 from pandas.tseries.period import Period
 from pandas import json
 from pandas.compat import (map, zip, reduce, range, lrange, u, add_metaclass,
-                           string_types)
+                           string_types, OrderedDict)
 from pandas.core import config
 from pandas.formats.printing import pprint_thing
 import pandas.compat as compat
@@ -418,9 +418,9 @@ def _parse_cell(cell_contents, cell_typ):
             sheets = [sheetname]
 
         # handle same-type duplicates.
-        sheets = list(set(sheets))
+        sheets = list(OrderedDict.fromkeys(sheets).keys())
 
-        output = {}
+        output = OrderedDict()
 
         for asheetname in sheets:
             if verbose:

pandas/io/tests/data/test_multisheet.xls

@@ -630,18 +630,18 @@ def test_read_csv_parse_simple_list(self):
     def test_url(self):
         # HTTP(S)
         url = ('https://raw.github.com/pandas-dev/pandas/master/'
-               'pandas/io/tests/parser/data/salary.table.csv')
+               'pandas/io/tests/parser/data/salaries.csv')
         url_table = self.read_table(url)
         dirpath = tm.get_data_path()
-        localtable = os.path.join(dirpath, 'salary.table.csv')
+        localtable = os.path.join(dirpath, 'salaries.csv')
         local_table = self.read_table(localtable)
         tm.assert_frame_equal(url_table, local_table)
         # TODO: ftp testing
 
     @tm.slow
     def test_file(self):
         dirpath = tm.get_data_path()
-        localtable = os.path.join(dirpath, 'salary.table.csv')
+        localtable = os.path.join(dirpath, 'salaries.csv')
         local_table = self.read_table(localtable)
 
         try: