How can I pass a list as a command-line argument with argparse?
I am trying to pass a list as an argument to a command line program. Is there an argparse option to pass a list as option? parser.add_argument ('-l', '--list', type=list, acti...
How to handle variable number of arguments (nargs='*')
The relevant Python bug is Issue 15112. argparse: nargs='*' positional argument doesn't accept any items if preceded by an option and another positional When argparse parses ['1', '2', '--spam', '8', '8', …
parsing - lexers vs parsers - Stack Overflow
Are lexers and parsers really that different in theory? It seems fashionable to hate regular expressions: coding horror, another blog post. However, popular lexing based tools: pygments, geshi,...
parsing - How to write a Parser in C#? - Stack Overflow
Sep 11, 2011 · How do I go about writing a Parser (Recursive Descent?) in C#? For now I just want a simple parser that parses arithmetic expressions (and reads variables?). Though later I intend to …
Whatever happened to package 'parser' in Python 3.10?
Aug 12, 2022 · parser has been deprecated and was removed in Python 3.10. From the v3.9 release notes: Python 3.9 uses a new parser, based on PEG instead of LL (1). The new parser’s …
python - Parsing boolean values with argparse - Stack Overflow
I would like to use argparse to parse boolean command-line arguments written as "--foo True" or "--foo False". For example: my_program --my_boolean_flag False However, the following test code does...
c# - What is parsing? - Stack Overflow
Jun 5, 2015 · A parser is a compiler / interpreter component that breaks data into smaller elements for easy translation into another language. A parser takes input in the form of a sequence of tokens or …
Python argparse: default value or specified value - Stack Overflow
Jul 14, 2014 · python script.py --example # args.example would equal a default value of 1 python script.py --example 2 # args.example would equal a default value of 2 I can create an action, but …
What's the best way to parse command line arguments?
What's the easiest, tersest, and most flexible method or library for parsing Python command line arguments?
What's the difference between a parser and a scanner?
Nov 15, 2009 · A parser converts this list of tokens into a Tree-like object to represent how the tokens fit together to form a cohesive whole (sometimes referred to as a sentence).