Python pandas.io.sql.DatabaseError() Examples

The following are 7 code examples of pandas.io.sql.DatabaseError(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module pandas.io.sql , or try the search function .
Example #1
Source File: utils.py    From pbt with MIT License 7 votes vote down vote up 
def load_sqlite_table(database_path, table_name):
    """Returns (table, connection). table is a pandas DataFrame."""
    conn = sqlite3.connect(database_path)
    try:
        df = pd.read_sql("SELECT * FROM %s" % table_name, conn)
        #  print("\nLoading %s table from SQLite3 database." % table_name)
    except DatabaseError as e:
        if 'no such table' in e.args[0]:
            print("\nNo such table: %s" % table_name)
            print("Create the table before loading it. " +
                  "Consider using the create_sqlite_table function")
            raise DatabaseError
        else:
            print(e)
            raise Exception("Failed to create %s table. Unknown error." %
                            table_name)
    return df, conn
Example #2
Source File: utils.py    From pbt with MIT License 6 votes vote down vote up 
def create_table(connect_str_or_path, use_sqlite, command):
    if use_sqlite:
        sqlite_path = connect_str_or_path
        conn = sqlite3.connect(sqlite_path)
        cur = conn.cursor()
        cur.execute(command)
        conn.commit()
        cur.close()
    else:
        conn = None
        try:
            db_connect_str = connect_str_or_path
            conn = psycopg2.connect(db_connect_str)
            cur = conn.cursor()
            cur.execute(command)
            conn.commit()
            cur.close()
        except (Exception, psycopg2.DatabaseError) as error:
            if "already exists" not in str(error):
                print(error)
        finally:
            if conn is not None:
                conn.close()
Example #3
Source File: test_sql.py    From recruit with Apache License 2.0 5 votes vote down vote up 
def test_read_sql_delegate(self):
        iris_frame1 = sql.read_sql_query("SELECT * FROM iris", self.conn)
        iris_frame2 = sql.read_sql("SELECT * FROM iris", self.conn)
        tm.assert_frame_equal(iris_frame1, iris_frame2)

        pytest.raises(sql.DatabaseError, sql.read_sql, 'iris', self.conn)
Example #4
Source File: test_sql.py    From vnpy_crypto with MIT License 5 votes vote down vote up 
def test_read_sql_delegate(self):
        iris_frame1 = sql.read_sql_query("SELECT * FROM iris", self.conn)
        iris_frame2 = sql.read_sql("SELECT * FROM iris", self.conn)
        tm.assert_frame_equal(iris_frame1, iris_frame2)

        pytest.raises(sql.DatabaseError, sql.read_sql, 'iris', self.conn)
Example #5
Source File: test_sql.py    From predictive-maintenance-using-machine-learning with Apache License 2.0 5 votes vote down vote up 
def test_read_sql_delegate(self):
        iris_frame1 = sql.read_sql_query("SELECT * FROM iris", self.conn)
        iris_frame2 = sql.read_sql("SELECT * FROM iris", self.conn)
        tm.assert_frame_equal(iris_frame1, iris_frame2)

        pytest.raises(sql.DatabaseError, sql.read_sql, 'iris', self.conn)
Example #6
Source File: test_sql.py    From elasticintel with GNU General Public License v3.0 5 votes vote down vote up 
def test_read_sql_delegate(self):
        iris_frame1 = sql.read_sql_query("SELECT * FROM iris", self.conn)
        iris_frame2 = sql.read_sql("SELECT * FROM iris", self.conn)
        tm.assert_frame_equal(iris_frame1, iris_frame2)

        pytest.raises(sql.DatabaseError, sql.read_sql, 'iris', self.conn)
Example #7
Source File: test_sql.py    From twitter-stock-recommendation with MIT License 5 votes vote down vote up 
def test_read_sql_delegate(self):
        iris_frame1 = sql.read_sql_query("SELECT * FROM iris", self.conn)
        iris_frame2 = sql.read_sql("SELECT * FROM iris", self.conn)
        tm.assert_frame_equal(iris_frame1, iris_frame2)

        pytest.raises(sql.DatabaseError, sql.read_sql, 'iris', self.conn)