[chronojump/chronojump-importer] insert_data() now returns a new data set instead of modifying the passed one.

[Carles Pina i Estany <carlespina src gnome org>]

commit c78f82729a773dcc9737560b55e14d73506221a7
Author: Carles Pina i Estany <carles pina cat>
Date:   Mon Sep 5 12:29:02 2016 +0100

    insert_data() now returns a new data set instead of modifying the passed one.

 src/chronojump-importer/chronojump_importer.py |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/src/chronojump-importer/chronojump_importer.py b/src/chronojump-importer/chronojump_importer.py
index 03f7c39..44e131c 100755
--- a/src/chronojump-importer/chronojump_importer.py
+++ b/src/chronojump-importer/chronojump_importer.py
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import copy
 import argparse
 import sqlite3
 import sys
@@ -50,11 +51,13 @@ def add_prefix(list_of_elements, prefix):
 
 def insert_data(database, table_name, data, matches_columns):
     """ Inserts data (list of dictionaries) into table_name for database.
-    Modifies data and adds new_unique_id. This is the new uniqueid or an
+    Returns a copy of data and adds new_unique_id. This is the new uniqueid or an
     existing one if a register with matches_columns already existed. """
+
+    data_result = copy.deepcopy(data)
     cursor = database.cursor()
 
-    for row in data:
+    for row in data_result:
         # First check if this already existed
 
         where = ""
@@ -86,6 +89,8 @@ def insert_data(database, table_name, data, matches_columns):
 
     database.commit()
 
+    return data_result
+
 
 def return_data_from_table(database, table_name, where_condition, skip_columns, join_clause =""):
     """ Returns a list of lists of the database, table executing where and skips the columns. """
@@ -427,7 +432,7 @@ def import_database(source_path, destination_path, source_session):
                            where_condition="Session.uniqueID={}".format(source_session),
                            skip_columns=["uniqueID"])
 
-    insert_data(database=destination_db, table_name="Session", data=session,
+    session = insert_data(database=destination_db, table_name="Session", data=session,
                               matches_columns=["name", "place", "date", "personsSportID", 
"personsSpeciallityID", "personsPractice", "comments"])
 
     new_session_id = session[0]['new_unique_id']