Is the behaviour of Python’s list += iterable documented anywhere?
It would appear that in Python, list += x works for any iterable x:
Python
Integer File Descriptor “0” in open()
In Python 3, it is possible to open a file object using an “integer file descriptor” with the format:
Simplest async/await example possible in Python
I’ve read many examples, blog posts, questions/answers about asyncio / async / await in Python 3.5+, many were complex, the simplest I found was probably this one.
Still it uses ensure_future, and for learning purposes about asynchronous programming in Python, I would like to see an even more minimal example, and what are the minimal tools necessary to do a basic async / await example.
Use Multiple Character Delimiter in Python Pandas read_csv
It appears that the pandas read_csv function only allows single character delimiters/separators. Is there some way to allow for a string of characters to be used like, “*|*” or “%%” instead?
Python server “Only one usage of each socket address is normally permitted”
I’m trying to create a very basic server in python that listens in on a port, creates a TCP connection when a client tries to connect, receives data, sends something back, then listens again (and repeats the process indefinitely). This is what I have so far:
Django persistent database connection
I’m using django with apache and mod_wsgi and PostgreSQL (all on same host), and I need to handle a lot of simple dynamic page requests (hundreds per second). I faced with problem that the bottleneck is that a django don’t have persistent database connection and reconnects on each requests (that takes near 5ms).
While doing a benchmark I got that with persistent connection I can handle near 500 r/s while without I get only 50 r/s.
Gauss-Legendre Algorithm in python
I need some help calculating Pi. I am trying to write a python program that will calculate Pi to X digits. I have tried several from the python mailing list, and it is to slow for my use.
I have read about the Gauss-Legendre Algorithm, and I have tried porting it to Python with no success.
Paramiko and Pseudo-tty Allocation
I’m trying to use Paramiko to connect to a remote host and execute a number of text file substitutions.
Hash Map in Python
I want to implement a HashMap in Python. I want to ask a user for an input. depending on his input I am retrieving some information from the HashMap. If the user enters a key of the HashMap, I would like to retrieve the corresponding value.
How can I see the formulas of an excel spreadsheet in pandas / python?
I would like to read in an excel spreadsheet to python / pandas, but have the formulae instead of the cell results.