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python Programming Glossary: querypython: How to add property to a class dynamically? http://stackoverflow.com/questions/1325673/python-how-to-add-property-to-a-class-dynamically behaves like a db resultset. So for example if a database query returns using a dict expression 'ab' 100 'cd' 200 then I would..
“Large data” work flows using pandas http://stackoverflow.com/questions/14262433/large-data-work-flows-using-pandas columns What will typical operations look like. E.g. do a query on columns to select a bunch of rows and specific columns then.. is optimized to operate on row wise which is what you query on we will create a table for each group of fields. This way..
http://stackoverflow.com/questions/1650591/whether-to-use-set-names I've stumbled upon the following Another common garbage query is SET NAMES UTF8 which is the wrong way to do things anyway.. call it should be considered much faster than issuing a query. In respect of performance the fastest way to ensure a UTF 8..
Google Search from a Python App http://stackoverflow.com/questions/1657570/google-search-from-a-python-app from a Python App I'm trying to run a google search query from a python app. Is there any python interface out there If.. python import json import urllib def showsome searchfor query urllib.urlencode 'q' searchfor url 'http ajax.googleapis.com.. ajax.googleapis.com ajax services search web v 1.0 s' query search_response urllib.urlopen url search_results search_response.read..
why does python's list.append evaluate to false? http://stackoverflow.com/questions/1682567/why-does-pythons-list-append-evaluate-to-false return None an application of the principle of Command query separation . Python's always reasonably pragmatic about things..
DatabaseError: current transaction is aborted, commands ignored until end of transaction block http://stackoverflow.com/questions/2979369/databaseerror-current-transaction-is-aborted-commands-ignored-until-end-of-tra improve this question This is what postgres does when a query produces an error and you try to run another query without first.. when a query produces an error and you try to run another query without first rolling back the transaction. To fix it you'll.. it you'll want to figure out where in the code that bad query is being executed. It might be helpful to use the log_statement..
Inverse Distance Weighted (IDW) Interpolation with Python http://stackoverflow.com/questions/3104781/inverse-distance-weighted-idw-interpolation-with-python None stat 0 interpolates z from the 3 points nearest each query point q For example interpol a query point q finds the 3 data.. 3 points nearest each query point q For example interpol a query point q finds the 3 data points nearest q at distances d1 d2.. points more farther points less. In 2d the circles around query points have areas ~ distance 2 so p 2 is inverse area weighting...
Django equivalent for count and group by http://stackoverflow.com/questions/327807/django-equivalent-for-count-and-group-by arrives at your own risk and in full knowledge that the query.group_by attribute is not part of a public API and could change.. attribute is not part of a public API and could change query_set Item.objects.extra select 'count' 'count 1 ' order_by.. 'count 1 ' order_by ' count' .values 'count' 'category' query_set.query.group_by 'category_id' If you then iterate over query_set..
How can I hide the console window in a PyQt app running on Windows? http://stackoverflow.com/questions/466203/how-can-i-hide-the-console-window-in-a-pyqt-app-running-on-windows the answer to it. Probably I just need to phrase my search query differently. Edit Thanks PEZ for the answer more details including..
How do you validate a URL with a regular expression in Python? http://stackoverflow.com/questions/827557/how-do-you-validate-a-url-with-a-regular-expression-in-python look unix like Or windows like Do you want to remove the query string Or preserve it These are not RFC specified validations...
http://stackoverflow.com/questions/8692/how-to-use-xpath-in-python res ctxt.xpathEval if len res 2 print xpath query wrong node set size sys.exit 1 if res 0 .name doc or res 1 .name.. 1 if res 0 .name doc or res 1 .name foo print xpath query wrong node set value sys.exit 1 doc.freeDoc ctxt.xpathFreeContext..
Separation of business logic and data access in django http://stackoverflow.com/questions/12578908/separation-of-business-logic-and-data-access-in-django user return remote_api.get_cached_name user.id Query methods If your query is not merely presentational you could.. is False objects InactiveUserManager class Meta proxy True Query models For queries that are inherently complex but are executed.. the denormalized model in sync with the primary model. Query models can only be used if changes are entirely under your control...
Why program functionally in Python? http://stackoverflow.com/questions/1892324/why-program-functionally-in-python and statements part of a general stance towards Command Query Separation . Me I think that when you use a language you're..
Django Query That Get Most Recent Objects From Different Categories http://stackoverflow.com/questions/2074514/django-query-that-get-most-recent-objects-from-different-categories Query That Get Most Recent Objects From Different Categories I have..
MySQL “incorrect string value” error when save unicode string in Django http://stackoverflow.com/questions/2108824/mysql-incorrect-string-value-error-when-save-unicode-string-in-django update auth_user set last_name 'Slatkevi iusa' where id 1 Query OK 1 row affected 1 warning 0.00 sec Rows matched 1 Changed..
Django 1.2 Equivalent of QuerySet.query.as_sql() http://stackoverflow.com/questions/2900057/django-1-2-equivalent-of-queryset-query-as-sql 1.2 Equivalent of QuerySet.query.as_sql In Django 1.1 I was able to produce the SQL.. In Django 1.1 I was able to produce the SQL used by a QuerySet with this notation QuerySet.query.as_sql In Django 1.2 this.. to produce the SQL used by a QuerySet with this notation QuerySet.query.as_sql In Django 1.2 this raises as AttributeError..
How to get a row-by-row MySQL ResultSet in python http://stackoverflow.com/questions/337479/how-to-get-a-row-by-row-mysql-resultset-in-python But on a ~9 000 000 rows table it prints Executing Query and then hangs for a long long time. That is why it makes no..
Executing “SELECT … WHERE … IN …” using MySQLdb http://stackoverflow.com/questions/4574609/executing-select-where-in-using-mysqldb the foo table was created mysql DROP TABLE IF EXISTS foo Query OK 0 rows affected 0.00 sec mysql CREATE TABLE `foo` `fooid`.. `bar` varchar 10 NOT NULL PRIMARY KEY `fooid` Query OK 0 rows affected 0.01 sec mysql INSERT into foo bar values.. 0.01 sec mysql INSERT into foo bar values 'A' 'B' 'C' 'D' Query OK 4 rows affected 0.00 sec Records 4 Duplicates 0 Warnings..
How are POST and GET variables handled in Python? http://stackoverflow.com/questions/464040/how-are-post-and-get-variables-handled-in-python In PHP you can just use _POST for POST and _GET for GET Query string variables. What's the equivalent in Python python ..
AppEngine: Query datastore for records with <missing> value http://stackoverflow.com/questions/598605/appengine-query-datastore-for-records-with-missing-value Query datastore for records with missing value I created a new property.. Without a Filtered Property Are Never Returned by a Query. So it is not possible to write a query for these old records...
memory-efficient built-in SqlAlchemy iterator/generator? http://stackoverflow.com/questions/7389759/memory-efficient-built-in-sqlalchemy-iterator-generator result the whole result set is in memory. But then the way Query works is that it fully loads the given result set by default.. collections and such might be only partially populated. So Query offers an option to change this behavior which is the yield_per.. orm query.html highlight yield_per#sqlalchemy.orm.query.Query.yield_per . This call will cause the Query to yield rows in..
Why is the same SQLite query being 30 times slower when fetching only twice as many results? http://stackoverflow.com/questions/10531898/why-is-the-same-sqlite-query-being-30-times-slower-when-fetching-only-twice-as-m self.cursor.execute 'begin' self.cursor.execute EXPLAIN QUERY PLAN SELECT precursor_id feature_table_id FROM `MSMS_precursor`.. spectrumFeature_InputValues print 'EXPLAIN QUERY PLAN ' print self.cursor.fetchall import time time0 time.time.. 'seconds' self.connection.commit and the results EXPLAIN QUERY PLAN 0 0 2 u'SCAN TABLE feature ~100000 rows ' 0 1 1 u'SEARCH..
Is there a Google Insights API? http://stackoverflow.com/questions/4440139/is-there-a-google-insights-api if a 0 'int' self.queries.append a 1 # ENTER THE BASE QUERY HERE base_query #This is the base query base_query s alphabet..
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