BUG: GH13194 fixed

Author: pfrcks

doc/source/whatsnew/v0.17.1.txt

@@ -202,3 +202,4 @@ Bug Fixes
 - Bug in ``DataFrame.to_sparse()`` loses column names for MultiIndexes (:issue:`11600`)
 - Bug in ``DataFrame.round()`` with non-unique column index producing a Fatal Python error (:issue:`11611`)
 - Bug in ``DataFrame.round()`` with ``decimals`` being a non-unique indexed Series producing extra columns (:issue:`11618`)
+- Fixed the bug in ``DataFrame.align()`` which was giving wrong output when supplied with the ``join`` argument. (:issue:`13194`)

pandas/core/generic.py

@@ -4153,7 +4153,8 @@ def align(self, other, join='outer', axis=None, level=None, copy=True,
                 # self
                 cons = self._constructor_expanddim
                 df = cons(dict((c, self) for c in other.columns),
-                          **other._construct_axes_dict())
+                          **self._construct_axes_dict(
+                          **other._construct_axes_dict(axes=['columns'])))
                 return df._align_frame(other, join=join, axis=axis,
                                        level=level, copy=copy,
                                        fill_value=fill_value, method=method,
@@ -4163,7 +4164,8 @@ def align(self, other, join='outer', axis=None, level=None, copy=True,
                 # other
                 cons = other._constructor_expanddim
                 df = cons(dict((c, other) for c in self.columns),
-                          **self._construct_axes_dict())
+                          **other._construct_axes_dict(
+                          **self._construct_axes_dict(axes=['columns'])))
                 return self._align_frame(df, join=join, axis=axis, level=level,
                                          copy=copy, fill_value=fill_value,
                                          method=method, limit=limit,