psycopg2

问题 I followed the following steps: [I am using Windows 8, Python 2.7.6] I created a virtual environment venv and then did pip install on requirements.txt to install all the libraries. I had to explicitly create a file called config.py to set the os.environ variables. Then, I am doing import config in other files. I have installed postgresql and added bin folder to environment path psycopg2 was failing to install from running requirements.txt. So, I downloaded the zip with setup.py from online,

问题 I have tried many ways of installing psycopg2 after having installed PostgreSQL using the one-click installer, but anyway I try confronts me with the same import error in python: ImportError: dlopen(/Library/Python/2.5/site-packages/psycopg2/_psycopg.so, 2): Library not loaded: libpq.5.dylib Referenced from: /Library/Python/2.5/site-packages/psycopg2/_psycopg.so Reason: image not found I am on Mac OS X 10.5.8. I am using Python 2.5. I installed PostgreSQL from the installer (I did not port it

问题 I am using the DateRange column type to save reservations for a booking system. My DB is PosgreSQL and I use Python 3 with Flask and SQLAlchemy. Even though it should be best practice to use DateRange , I dont even find a documentation or anything helpful on how to work with these types. The SQLAlchemy documentation has only 2 sentences written that such a column type exists. A side note here: All resources, which I find only show that people usually use a start date and an end date. Is my

问题 Based on this previous question I am trying to compose an insert statement in Python using psycopg2 with some data. The query works beautifully in postgresql console but when I try it from psycopg2 I get an error. Here's the table i want to insert to create_test_table = """CREATE TABLE persons( name VARCHAR, age INT, dob DATE, sex VARCHAR);""" Here's the data I want to insert d_ = {"name":"Gino", "age": "", "dob": "na", "sex": "M"} And here's my query: cur.execute("""INSERT INTO persons (age

问题 I'm trying to setup a basic working postgis setup with python ppygis package. >>> import psycopg2 >>> import ppygis >>> connection = psycopg2.connect(database='spre', user='postgres') >>> cursor = connection.cursor() >>> cursor.execute('CREATE TABLE test (geometry GEOMETRY)') >>> cursor.execute('INSERT INTO test VALUES(%s)', (ppygis.Point(1.0, 2.0),)) >>> cursor.execute('SELECT * from test') >>> point = cursor.fetchone()[0] >>> print point 0101000000000000000000F03F0000000000000040 >>> I

问题 I am trying to parameterize some parts of a SQL Query using the below dictionary: query_params = dict( {'target':'status', 'date_from':'201712', 'date_to':'201805', 'drform_target':'NPA' }) sql_data_sample = str("""select * from table_name where dt = %(date_to)s and %(target)s in (%(drform_target)s) ---------------------------------------------------- union all ---------------------------------------------------- (select *, from table_name where dt = %(date_from)s and %(target)s in ('ACT')

问题 I am in Python 2.7, using psycopg2 to connect to an Amazon Redshift database. I have unit tests, and in the setUp and tearDown methods for this test class, I drop the tables that were created for the purpose of this test. So the scheme is: def setUp(self): drop_specific_tables() create_specific_tables() def tearDown(self): drop_specific_tables() The reason for dropping in the setUp as well as tearDown is in case a test exits unsafely and skips tearDown we can still know that whenever it runs

问题 I have a Python dataframe with NULL value in some rows, while inserting to postgresql, some null in datetype column turns into 'NaT' string or 'NaN', I like it to be a real NULL , which is nothing in that cell. sample dataframe before insert import psycopg2 import pandas as pd import numpy as np conn=psycopg2.connect(dbname= 'myDB', host='amazonaws.com', port= '2222', user= 'mysuser', password= 'mypass') cur = conn.cursor() df= pd.DataFrame({ 'zipcode':[1,np.nan,22,88],'city':['A','h','B',np

问题 I am using the copy_expert method in psycopg2 to copy data from a CSV file to a postgresql table. I have postgres table like this: create table my_table ( cola text, colb text, colc text, cold text, cole text, colf text, colg text ) And a CSV containing data like for the first five columns like this: cola,colb,colc,cold,cole 1,foo,a,10,vvv 2,bar,b,20,www 3,baz,c,30,xxx 4,boo,d,40,yyy 5,baa,e,50,zzz I would like to copy the CSV data for the first five columns, while also specifying values for

问题 Right now i am able to connect to the url api and my database. I am trying to insert data from the url to the postgresql database using psycopg2. I dont fully understand how to do this, and this is all i could come up with to do this. import urllib3 import json import certifi import psycopg2 from psycopg2.extras import Json http = urllib3.PoolManager( cert_reqs='CERT_REQUIRED', ca_certs=certifi.where()) url = '<API-URL>' headers = urllib3.util.make_headers(basic_auth='<user>:<passowrd>') r =