When key is not a key in f, getfirst returns default. Use getfirst when you know that there should be just one input field (or at most one input field) named key in the form from which your script’s input comes. getfirst was introduced in Python 2.2, so don’t use it if your...
First add a @cache decorator to your module: Python decorators.py import functools # ... def cache(func): """Keep a cache of previous function calls""" @functools.wraps(func) def wrapper_cache(*args, **kwargs): cache_key = args + tuple(kwargs.items()) if cache_key not in ...
.. versionchanged:: 1.2.0 Support for binary file objects was introduced. sep : str, default ',' String of length 1. Field delimiter for the output file. na_rep : str, default '' Missing data representation. float_format : str, default None Format string for floating point numbers...
The other suggestion from the bottom of the last page was to allow users to specify the set of letters to search for, as opposed to always using the five vowels. To do this we can add a second argument to the function that specifies the letters to searchphrasefor. This is an easy cha...
The label and button were contained within a frame, which in turn was contained within the root window. When creating each child widget, its parent widget is passed as the first argument to the widget constructor. configuration options Widgets have configuration options, which modify their ...
We open the filename that was passed on the command line and specify that it should be opened as read-only. We read the file lines into a list called lines and close our file. for line in lines: data = line.split(':') # Set username and password to first 2 fields ...
django.utils.encodingwas deeply refactored in Django 1.5 to provide a more consistent API. Check its documentation for more information. django.utils.safestringis mostly used via themark_safe()andmark_for_escaping()functions, which didn’t change. In case you’re using the internals, here are...
Thedata science experience was first introduced in the last October release, and one of the top feedback requests we’ve heard was to provide the ability to iterate rapidly by experimenting with code in an interactive console environment. In this update, we extended the Python Interactive window...
Pythons were each offered a frozen-thawed day-old chicken to eat once per week for the first two months. From two to 12 months pythons were offered a combination of frozen-thawed day-old chickens and sausages on a weekly basis (Table 1). The mass of food offered was not measured but ...
The concurrent.futures module that was introduced in Python 3 provides a convenient way to manage pools of workers. If you have previously used the threading module in the Python standard library, you will have seen code like this before:...