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python Programming Glossary: ruleHow many Python classes should I put in one file? [closed] http://stackoverflow.com/questions/106896/how-many-python-classes-should-i-put-in-one-file who will read maintain and extend your software. The rule is this a module is the unit of reuse . You can't easily reuse..
http://stackoverflow.com/questions/11007627/python-variable-declaration to objects. Second point Python follows a very simple rule when it comes to classes that is actually much more consistent..
http://stackoverflow.com/questions/1151658/python-hashable-dicts using a tuple as I'd be doing anyways doesn't help. cache rule foo bar cache rule baz quux Traceback most recent call last.. be doing anyways doesn't help. cache rule foo bar cache rule baz quux Traceback most recent call last File stdin line 1 in.. from collections import namedtuple Rule namedtuple Rule rule.keys cache Rule rule baz quux cache Rule foo 'bar' 'baz' 'quux'..
Multiple versions of Python on OS X Leopard http://stackoverflow.com/questions/1218891/multiple-versions-of-python-on-os-x-leopard Any recommendations of using one version of python to rule them all How would I go about deleted older versions and linking..
Threading in a PyQt application: Use Qt threads or Python threads? http://stackoverflow.com/questions/1595649/threading-in-a-pyqt-application-use-qt-threads-or-python-threads you need a QThread for that to work. A general rule of thumb might be to use QThreads if you're going to interact..
why does python's list.append evaluate to false? http://stackoverflow.com/questions/1682567/why-does-pythons-list-append-evaluate-to-false pragmatism but those are definitely the exception not the rule and there's no reason to make append an exception . share improve..
Why do people write #!/usr/bin/env python on the first line of a Python script? http://stackoverflow.com/questions/2429511/why-do-people-write-usr-bin-env-python-on-the-first-line-of-a-python-script . If you're talking about other platforms of course this rule does not apply but that shebang line does no harm and will help..
Short Description of Python Scoping Rules http://stackoverflow.com/questions/291978/short-description-of-python-scoping-rules Python Scoping Rules What exactly are the Python scoping rules If I have some code code1 class Foo code2 def spam..... code3.. share improve this question Actually a concise rule for Python Scope resolution from Learning Python 3rd. Ed. ... Scope resolution from Learning Python 3rd. Ed. . These rules are specific to variable names not attributes. If you reference..
Python function attributes - uses and abuses http://stackoverflow.com/questions/338101/python-function-attributes-uses-and-abuses of is PLY 's usage of the docstring to associate a syntax rule with a method. But what about custom attributes Are there good..
Python list comprehension rebind names even after scope of comprehension. Is this right? http://stackoverflow.com/questions/4198906/python-list-comprehension-rebind-names-even-after-scope-of-comprehension-is-thi even now that I know it's a problem. I need to make a rule like always preface temp vars in list comprehensions with underscore..
Setting the correct encoding when piping stdout in python http://stackoverflow.com/questions/492483/setting-the-correct-encoding-when-piping-stdout-in-python is using. If you are piping you must encode it yourself. A rule of thumb is Always use unicode internally. decode what you receive..
Why do you need explicitly have the “self” argument into a Python method? http://stackoverflow.com/questions/68282/why-do-you-need-explicitly-have-the-self-argument-into-a-python-method to make things like this explicit rather than based on a rule. Additionally since nothing is implied or assumed parts of the..
http://stackoverflow.com/questions/9264763/unboundlocalerror-in-python out the scope of variables itself. It does so by a simple rule If there is an assignment to a variable inside a function that..
Best practice for Python Assert http://stackoverflow.com/questions/944592/best-practice-for-python-assert is less than zero' Also is there any way to set a business rule like if x 0 raise error that is always checked without the try..
Executing Javascript Submit form functions using scrapy in python http://stackoverflow.com/questions/10648644/executing-javascript-submit-form-functions-using-scrapy-in-python work. from scrapy.contrib.spiders import CrawlSpider Rule from scrapy.contrib.linkextractors.sgml import SgmlLinkExtractor.. name SeleniumSpider start_urls http www.domain.com rules Rule SgmlLinkExtractor allow ' .html' callback 'parse_page' follow..
http://stackoverflow.com/questions/1151658/python-hashable-dicts from above session from collections import namedtuple Rule namedtuple Rule rule.keys cache Rule rule baz quux cache Rule.. session from collections import namedtuple Rule namedtuple Rule rule.keys cache Rule rule baz quux cache Rule foo 'bar' 'baz'.. import namedtuple Rule namedtuple Rule rule.keys cache Rule rule baz quux cache Rule foo 'bar' 'baz' 'quux' Ok. But I have..
http://stackoverflow.com/questions/16129071/pagination-using-scrapy link at the bottom of the page My code till now is rules Rule SgmlLinkExtractor restrict_xpaths ' li @class normalLeft div.. restrict_xpaths ' li @class normalLeft div a' unique True Rule SgmlLinkExtractor restrict_xpaths ' div @id topParentChilds.. div @id topParentChilds div div @class clm2 a' unique True Rule SgmlLinkExtractor restrict_xpaths ' p @class proHead a' unique..
http://stackoverflow.com/questions/172720/speeding-up-python performance Remember the Jackson rules of optimization Rule 1 Don't do it. Rule 2 for experts only Don't do it yet. And.. the Jackson rules of optimization Rule 1 Don't do it. Rule 2 for experts only Don't do it yet. And the Knuth rule Premature.. root of all evil. The more useful rules are in the General Rules for Optimization . Don't optimize as you go. First get it right...
Short Description of Python Scoping Rules http://stackoverflow.com/questions/291978/short-description-of-python-scoping-rules Description of Python Scoping Rules What exactly are the Python scoping rules If I have some code.. you reference it without a period these rules apply LEGB Rule. L. Local. Names assigned in any way within a function def or..
Implementing a “rules engine” in Python http://stackoverflow.com/questions/467738/implementing-a-rules-engine-in-python matches the rule. Very quickly something like class RegexRule Rule def __init__ self regex self.regex regex def match self.. the rule. Very quickly something like class RegexRule Rule def __init__ self regex self.regex regex def match self message.. return self.regex.match message.contents class SeverityRule Rule def __init__ self operator severity self.operator operator..
Crawling with an authenticated session in Scrapy http://stackoverflow.com/questions/5851213/crawling-with-an-authenticated-session-in-scrapy 'domain.com' start_urls 'http www.domain.com login ' rules Rule SgmlLinkExtractor allow r' w .html ' callback 'parse_item' follow.. en 0.14 topics spiders.html#scrapy.contrib.spiders.Rule This is because with a CrawlSpider parse the default callback.. of any request sends the response to be processed by the Rule s. Logging in before crawling In order to have some kind of..
flask blueprint template folder http://stackoverflow.com/questions/7974771/flask-blueprint-template-folder instead of main index.html. I checked app.url_map Rule 'admin' HEAD OPTIONS GET admin.index Rule 'main' HEAD OPTIONS.. app.url_map Rule 'admin' HEAD OPTIONS GET admin.index Rule 'main' HEAD OPTIONS GET main.index Also I verified that index..
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