Remove useless new object

2020-08-18 16:08:14 +07:00 · 2020-08-18 16:08:14 +07:00 · aea763021c
parent c246c0715d
commit aea763021c
1 changed files with 1 additions and 3 deletions
--- a/relational/relation.py
+++ b/relational/relation.py
@ -129,8 +129,6 @@ class Relation(NamedTuple):
        '''
        Selection, expr must be a valid Python expression; can contain field names.
        '''
-        header = Header(self.header)
-
        try:
            c_expr = compile(expr, 'selection', 'eval')
        except:
@ -148,7 +146,7 @@ class Relation(NamedTuple):
                    content.append(i)
            except Exception as e:
                raise Exception(f'Failed to evaluate {expr}\n{e}')
-        return Relation(header, frozenset(content))
+        return Relation(self.header, frozenset(content))

    def product(self, other: 'Relation') -> 'Relation':
        '''