Error When Parsing Command Line Argument String
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how
Python Command Line Argument Parsing
to get and parse the argument, including one bash command line argument parsing on this website. But the program just wouldn't recognize the flags. what java command line argument parsing is wrong? I think my program looks exactly same with those in tutorials. I use VS 2008 on a
Perl Command Line Argument Parsing
64 bit PC. The program was run with arguments "-g GRB2 -n 1000" My code: 1 exit(0); } else { for(size_t i = 1; i<5;i++) { if(argv[i] == "-g") geneName = argv[i+1]; if(argv[i] == "-n") testRep = atoi(argv[i+1]); else { cout << "Tag error"< arguments and sub-commands¶ New in version 2.7. Source code: Lib/argparse.py Tutorial This page contains the API reference information. For a more gentle introduction to Python command-line parsing, have a look at go command line argument parsing the argparse tutorial. The argparse module makes it easy to write user-friendly command-line interfaces. The program defines what arguments it requires, and argparse will figure out how to parse c++ command line argument parsing those out of sys.argv. The argparse module also automatically generates help and usage messages and issues errors when users give the program invalid arguments. 15.4.1. Example¶ The following code http://www.cplusplus.com/forum/beginner/26041/ is a Python program that takes a list of integers and produces either the sum or the max: import argparse parser = argparse.ArgumentParser(description='Process some integers.') parser.add_argument('integers', metavar='N', type=int, nargs='+', help='an integer for the accumulator') parser.add_argument('--sum', dest='accumulate', action='store_const', const=sum, default=max, help='sum the integers (default: find the max)') args = parser.parse_args() print args.accumulate(args.integers) Assuming the Python code above is saved into a file called https://docs.python.org/2/library/argparse.html class="pre">prog.py, it can be run at the command line and provides useful help messages: $ python prog.py -h usage: prog.py [-h] [--sum] N [N ...] Process some integers. positional arguments: N an integer for the accumulator optional arguments: -h, --help show this help message and exit --sum sum the integers (default: find the max) When run with the appropriate arguments, it prints either the sum or the max of the command-line integers: $ python prog.py 1 2 3 4 4 $ python prog.py 1 2 3 4 --sum 10 If invalid arguments are passed in, it will issue an error: $ python prog.py a b c usage: prog.py [-h] [--sum] N [N ...] prog.py: error: argument N: invalid int value: 'a' The following sections walk you through this example. 15.4.1.1. Creating a parser¶ The first step in using the argparse is creating an ArgumentParser object: >>> parser = argparse.ArgumentParser(description='Process some integers.') The ArgumentParser object will hold all the information necessary to parse the command line into Python data types. 15.4.1.2. Adding arguments¶ Filling an ArgumentParser with information about program arguments i here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of http://stackoverflow.com/questions/7341683/parsing-arguments-to-a-java-command-line-program this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up command line Parsing arguments to a Java command line program up vote 22 down vote favorite 7 What if I wanted to parse this: java MyProgram -r opt1 -S opt2 arg1 arg2 arg3 arg4 --test -A opt3 And the result I want in my program is: regular Java args[] of size=4 org.apache.commons.cli.Options[] of size=3 org.apache.commons.cli.Options[] #2 of size=1 I would prefer to use Apache Commons CLI, command line argument but the documentation is a little unclear about the case I present above. Specifically, the documentation doesn't tell you how to handle options of the 3rd type I specify below: 1. options with a "-" char 2. options with a "--" char 3. options without any marker, or "bare args" I wish that Apache Commons CLI would work but STILL be able to pass regular args to the program if those args didn't have a option prefix. Maybe it does but the documentation doesnt say so as I read through it... java command-line-interface args share|improve this question edited Sep 7 '11 at 23:51 asked Sep 7 '11 at 23:43 djangofan 11.6k32109187 Possible duplicate of How to parse command line arguments in Java? –xenteros Aug 30 at 6:57 add a comment| 8 Answers 8 active oldest votes up vote 19 down vote accepted You could just do it manually. NB: might be better to use a HashMap instead of an inner class for the opts. /** convenient "-flag opt" combination */ private class Option { String flag, opt; public Option(String flag, String opt) { this.flag = flag;
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#include Ruby Command Line Argument Parsing
Groovy Command Line Argument Parsing