Python 3.2 introduced Concurrent Futures, which appear to be some advanced combination of the older threading and multiprocessing modules. What are the advantages and disadvantages of using this for CPU bound tasks over the older multiprocessing module? This article suggests they’re much easier to work with – is that the case? 6 Answers 6
I have a dataframe with column names, and I want to find the one that contains a certain string, but does not exactly match it. I’m searching for ‘spike’ in column names like ‘spike-2’, ‘hey spike’, ‘spiked-in’ (the ‘spike’ part is always continuous). I want the column name to be returned as a string or … Read more
Both the following snippets of code do the same thing. They catch every exception and execute the code in the except: block Snippet 1 – try: #some code that may throw an exception except: #exception handling code Snippet 2 – try: #some code that may throw an exception except Exception as e: #exception handling code … Read more
I installed Python 3.x (besides Python 2.x on Ubuntu) and slowly started to pair modules I use in Python 2.x. So I wonder, what approach should I take to make my life easy by using pip for both Python 2.x and Python 3.x? 10 Answers 10
How can I make anaconda environment file which could be use on other computers? I exported my anaconda python environment to YML using conda env export > environment.yml. The exported environment.yml contains this line prefix: /home/superdev/miniconda3/envs/juicyenv which maps to my anaconda’s location which will be different on other’s pcs. 8 Answers 8
I want to check my environment for the existence of a variable, say “FOO”, in Python. For this purpose, I am using the os standard library. After reading the library’s documentation, I have figured out 2 ways to achieve my goal: Method 1: if “FOO” in os.environ: pass Method 2: if os.getenv(“FOO”) is not None: … Read more
TypeError: a bytes-like object is required, not ‘str’ getting above error while Executing below python code to save the HTML table data in Csv file. don’t know how to get rideup.pls help me. import csv import requests from bs4 import BeautifulSoup url=”http://www.mapsofindia.com/districts-india/” response=requests.get(url) html=response.content soup=BeautifulSoup(html,’html.parser’) table=soup.find(‘table’, attrs={‘class’:’tableizer-table’}) list_of_rows=[] for row in table.findAll(‘tr’)[1:]: list_of_cells=[] for cell … Read more
My local machine is running Python 2.5 and Nginx on Ubuntu 8.10, with Django builded from latest development trunk. For every URL I request, it throws: TemplateDoesNotExist at /appname/path appname/template_name.html Django tried loading these templates, in this order: * Using loader django.template.loaders.filesystem.function: * Using loader django.template.loaders.app_directories.function: TEMPLATE_DIRS (‘/usr/lib/python2.5/site-packages/projectname/templates’,) Is it looking for /usr/lib/python2.5/site-packages/projectname/templates/appname/template_name.html in this … Read more
Suppose I have a DataFrame with some NaNs: >>> import pandas as pd >>> df = pd.DataFrame([[1, 2, 3], [4, None, None], [None, None, 9]]) >>> df 0 1 2 0 1 2 3 1 4 NaN NaN 2 NaN NaN 9 What I need to do is replace every NaN with the first non-NaN … Read more
I know @ is for decorators, but what is @= for in Python? Is it just reservation for some future idea? This is just one of my many questions while reading tokenizer.py. 3 Answers 3
