I am trying to write a table to a PostgreSQL database from a Pandas data frame (following this answer) but I am getting the error AttributeError: 'Engine' object has no attribute 'cursor'
My code is:
import pandas as pd from sqlalchemy import create_engine import numpy as np df = pd.DataFrame(index=np.arange(1, 11), data=np.random.random(size=(10, 10)), columns=['c{}'.format(i) for i in np.arange(1, 11)]) engine = create_engine('postgresql://user@localhost:5432/db') df.to_sql('scores', engine) engine can connect to the db and return table names.
I am using Python 2.7.8, Pandas 0.15.2, Sqlalchmey 1.0.10 and Postgre 9.4.5.0
---- EDIT ----
I should add that I was getting the error when running this code from within a Jupyter notebook (iPython 3.0.0). When I run from a Python command line it works fine.
---- Full traceback ----
--------------------------------------------------------------------------- AttributeError Traceback (most recent call last) <ipython-input-276-da2dfbe48036> in <module>() 8 9 engine = create_engine('postgresql://phil@localhost:5432/rh') ---> 10 df.to_sql('scores', con=engine) /Library/Python/2.7/site-packages/pandas/core/generic.pyc in to_sql(self, name, con, flavor, schema, if_exists, index, index_label, chunksize, dtype) 964 self, name, con, flavor=flavor, schema=schema, if_exists=if_exists, 965 index=index, index_label=index_label, chunksize=chunksize, --> 966 dtype=dtype) 967 968 def to_pickle(self, path): /Library/Python/2.7/site-packages/pandas/io/sql.pyc in to_sql(frame, name, con, flavor, schema, if_exists, index, index_label, chunksize, dtype) 536 pandas_sql.to_sql(frame, name, if_exists=if_exists, index=index, 537 index_label=index_label, schema=schema, --> 538 chunksize=chunksize, dtype=dtype) 539 540 /Library/Python/2.7/site-packages/pandas/io/sql.pyc in to_sql(self, frame, name, if_exists, index, index_label, schema, chunksize, dtype) 1502 if_exists=if_exists, index_label=index_label, 1503 dtype=dtype) -> 1504 table.create() 1505 table.insert(chunksize) 1506 /Library/Python/2.7/site-packages/pandas/io/sql.pyc in create(self) 635 636 def create(self): --> 637 if self.exists(): 638 if self.if_exists == 'fail': 639 raise ValueError("Table '%s' already exists." % self.name) /Library/Python/2.7/site-packages/pandas/io/sql.pyc in exists(self) 623 624 def exists(self): --> 625 return self.pd_sql.has_table(self.name, self.schema) 626 627 def sql_schema(self): /Library/Python/2.7/site-packages/pandas/io/sql.pyc in has_table(self, name, schema) 1512 query = flavor_map.get(self.flavor) 1513 -> 1514 return len(self.execute(query).fetchall()) > 0 1515 1516 def get_table(self, table_name, schema=None): /Library/Python/2.7/site-packages/pandas/io/sql.pyc in execute(self, *args, **kwargs) 1403 cur = self.con 1404 else: -> 1405 cur = self.con.cursor() 1406 try: 1407 if kwargs: AttributeError: 'Engine' object has no attribute 'cursor'