What is the robust way to upgrade Pandas?
Regards,
David
On Monday, 4 October 2021, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
On Monday, 4 October 2021, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote:
On 10/4/21 9:20 AM, Shaozhong SHI wrote:
Hello, Adrian Klaver,
Pandas version is 0.23.0.
The reason the below does not work is method did not show up until pandas 0.24.0.
I used the following code:
def psql_insert_copy(table, conn, keys, data_iter):
# gets a DBAPI connection that can provide a cursor
dbapi_conn = conn.connection
with dbapi_conn.cursor() as cur:
s_buf = StringIO()
writer = csv.writer(s_buf)
writer.writerows(data_iter)
s_buf.seek(0)
columns = ', '.join('"{}"'.format(k) for k in keys)
if table.schema:
table_name = '{}.{}'.format(table.schema, table.name <http://table.name>)
else:
table_name = table.name <http://table.name>
sql = 'COPY {} ({}) FROM STDIN WITH CSV'.format(
table_name, columns)
cur.copy_expert(sql=sql, file=s_buf)
engine = create_engine('postgresql+psycopg2://:5432/postgres')
try:
df.to_sql('test1', engine, schema='public', if_exists='append', index=False, method=psql_insert_copy)
I could not find obvious reasons.
Regards,
David
--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx
