Scrapy Crawl URLs in Order
So, my problem is relatively simple. I have one spider crawling multiple sites, and I need it to return the data in the order I write it in my code. It’s posted below.
python
How can I do multiple substitutions using regex?
I can use this code below to create a new file with the substitution of a with aa using regular expressions.
Expire a view-cache in Django?
The @cache_page decorator is awesome. But for my blog I would like to keep a page in cache until someone comments on a post. This sounds like a great idea as people rarely comment so keeping the pages in memcached while nobody comments would be great. I’m thinking that someone must have had this problem before? And this is different than caching per url.
Storing Python dictionaries
I’m used to bringing data in and out of Python using CSV files, but there are obvious challenges to this. Are there simple ways to store a dictionary (or sets of dictionaries) in a JSON or pickle file?
How can I use a SOCKS 4/5 proxy with urllib2?
How can I use a SOCKS 4/5 proxy with urllib2 to download a web page?
Python 3.7 anaconda environment – import _ssl DLL load fail error
I created anaconda environment with Python=3.7 and have trouble with the error of _ssl and DLL. When I tried to get back to my base environment, I have trouble getting the background processes to complete as shown in the figure below, this goes on forever.
Quick way to upsample numpy array by nearest neighbor tiling
I have a 2D array of integers that is MxN, and I would like to expand the array to (BM)x(BN) where B is the length of a square tile side thus each element of the input array is repeated as a BxB block in the final array. Below is an example with a nested for … Read more
How to put parameterized sql query into variable and then execute in Python?
I understand that the correct way to format a sql query in Python is like this:
Stopword removal with NLTK
I am trying to process a user entered text by removing stopwords using nltk toolkit, but with stopword-removal the words like ‘and’, ‘or’, ‘not’ gets removed. I want these words to be present after stopword removal process as they are operators which are required for later processing text as query. I don’t know which are the words which can be operators in text query, and I also want to remove unnecessary words from my text.
What’s the best way to initialize a dict of dicts in Python?
A lot of times in Perl, I’ll do something like this: $myhash{foo}{bar}{baz} = 1 How would I translate this to Python? So far I have: if not 'foo' in myhash: myhash['foo'] = {} if not 'bar' in myhash['foo']: myhash['foo']['bar'] = {} myhash['foo']['bar']['baz'] = 1 Is there a better way? Answers: Thank you for visiting the … Read more