How can I do something like: But I would like isinstance to return True for this Unicode encoded string. Is there a Unicode string object type? Answer Test for str: or, if you must handle bytestrings, test for bytes separately: The two types are deliberately not exchangible; use explicit encoding (for str -&g…
Tag: python
How can I read exactly one response chunk with python’s http.client?
Using http.client in Python 3.3+ (or any other builtin python HTTP client library), how can I read a chunked HTTP response exactly one HTTP chunk at a time? I’m extending an existing test fixture (written in python using http.client) for a server which writes its response using HTTP’s chunked tran…
Using an extra python package index url with setup.py
Is there a way to use an extra Python package index (ala pip –extra-index-url pypi.example.org mypackage) with setup.py so that running python setup.py install can find the packages hosted on pypi.example.org? Answer If you’re the package maintainer, and you want to host one or more dependencies f…
What are Flask Blueprints, exactly?
I have read the official Flask documentation on Blueprints and even one or two blog posts on using them. I’ve even used them in my web app, but I don’t completely understand what they are or how they fit into my app as a whole. How is it similar to an instance of my app but not quite? The document…
Python web-scraping error – TypeError: can’t use a string pattern on a bytes-like object
I want to build a web scraper. Currently, I’m learning Python. This is the very basics! Python Code Error: Answer You have to decode your data. Since the website in question says use that. utf-8 won’t work in this case.
Python equivalent of a given wget command
I’m trying to create a Python function that does the same thing as this wget command: -c – Continue from where you left off if the download is interrupted. –read-timeout=5 – If there is no new data coming in for over 5 seconds, give up and try again. Given -c this mean it will try agai…
Python script not executing (No module named APNSWrapper)
In the terminal I run this command: I have tried to install the module: I have tried to install APNS: I get the following error: script code: This is really frustrating me, not sure why the script is not executing. Answer Most likely pip and python point to different Python installations. One might be from pa…
numpy genfromtxt collapse recarray when data file has only one row
I am using genfromtxt function to read data from a csv file. Then I can access the array columns with e.g.: which then returns a 1-dimensional vector. Only when the source file has exactly one data row, the array is collapsed – its shape==() and therefore the vector returned by data[“My column nam…
Pop multiple items from the beginning and end of a list
Suppose I have a list of items like this: I want to pop two items from the left (i.e. a and b) and two items from the right (i.e. h,i). I want the most concise an clean way to do this. I could do it this way myself: Any other alternatives? Answer From a performance point of view: mylist =
All possible points of (latitude,longitude) from latitude/longitude coordinates in separate arrays
I have latitude and longitude coordinates in two separate arrays: How can I easily find all possible points made up of these coordinates? I’ve been messing around with itertools.combinations: but this doesn’t work for me because the points (71,75) and (43,42) are latitude/latitude and longitude/lo…