473,834 Members | 1,682 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Can optparse do dependencies?

Bob
I'd like to setup command line switches that are dependent on other
switches, similar to what rpm does listed below. From the grammar below
we see that the "query-options" are dependent on the query switch,
{-q|--query}. Can "optparse" do this or do I have to code my own
"thing"? Thanks.

QUERYING AND VERIFYING PACKAGES:
rpm {-q|--query} [select-options] [query-options]
....
query-options
[--changelog] [-c,--configfiles] [-d,--docfiles] [--dump]
[--filesbypkg] [-i,--info] [--last] [-l,--list]
[--provides] [--qf,--queryformat QUERYFMT]
[-R,--requires] [--scripts] [-s,--state]
[--triggers,--triggerscripts]

Feb 25 '06 #1
3 2809
[Bob]
I'd like to setup command line switches that are dependent on other
switches, similar to what rpm does listed below. From the grammar below
we see that the "query-options" are dependent on the query switch,
{-q|--query}. Can "optparse" do this or do I have to code my own
"thing"? Thanks.

QUERYING AND VERIFYING PACKAGES:
rpm {-q|--query} [select-options] [query-options]
...
query-options
[--changelog] [-c,--configfiles] [-d,--docfiles] [--dump]
[--filesbypkg] [-i,--info] [--last] [-l,--list]
[--provides] [--qf,--queryformat QUERYFMT]
[-R,--requires] [--scripts] [-s,--state]
[--triggers,--triggerscripts]


The optparse module doesn't have native support for switch
dependencies; however, it could likely be done with multiple passes.
The parse_args() takes an args list as an argument. Make first pass
that captures your main query switches, then run another parser on a
slice of the args list.

For example, capture the main switches on a first pass over the full
argument list (catching all possible main switches and treating
everything else as a catchall). Given, args=['-ql', '--changelog',
'-d', '-c'], parse out the --changelog and then call another parser
with args=['-d', '-c'].

This functionality seems useful enough to build into the tool directly,
so do consider putting a feature request on SourceForge (and assign to
Greg Ward).
Raymond

Feb 25 '06 #2
Raymond Hettinger wrote:
I'd like to setup command line switches that are dependent on other
switches, similar to what rpm does listed below. From the grammar
below we see that the "query-options" are dependent on the query
switch, {-q|--query}. Can "optparse" do this or do I have to code my
own "thing"? Thanks.

QUERYING AND VERIFYING PACKAGES:
rpm {-q|--query} [select-options] [query-options]
...
query-options
[--changelog] [-c,--configfiles] [-d,--docfiles] [--dump]
[--filesbypkg] [-i,--info] [--last] [-l,--list]
[--provides] [--qf,--queryformat QUERYFMT]
[-R,--requires] [--scripts] [-s,--state]
[--triggers,--triggerscripts]


The optparse module doesn't have native support for switch
dependencies; however, it could likely be done with multiple passes.
The parse_args() takes an args list as an argument. Make first pass
that captures your main query switches, then run another parser on a
slice of the args list.

For example, capture the main switches on a first pass over the full
argument list (catching all possible main switches and treating
everything else as a catchall). Given, args=['-ql', '--changelog',
'-d', '-c'], parse out the --changelog and then call another parser
with args=['-d', '-c'].

This functionality seems useful enough to build into the tool
directly, so do consider putting a feature request on SourceForge
(and assign to Greg Ward).


In fact, if we were to request an addition to optparse in this direction, I
think it should add standardized support for the "subcommand pattern", that is
the same command line arrangement that CVS, SVN and other programs uses. rpm
doesn't use it and I consider this an error in UI design (it should really have
been "rpm query --changelog" and similar).
--
Giovanni Bajo
Feb 26 '06 #3
* Bob (bo********@yah oo.com) wrote:
I'd like to setup command line switches that are dependent on other
switches, similar to what rpm does listed below. From the grammar below
we see that the "query-options" are dependent on the query switch,
{-q|--query}. Can "optparse" do this or do I have to code my own
"thing"? Thanks.


After you pull your options and arguments from optparse, just check for
them, eg:

parser = optparse.Option Parser()
....
(options, args) = parser.parse_ar gs()

if (option.q and not option.p):
parser.error("y ou must use p to use q")

The meaning of -b doesn't change when it follows -a, but if you want
that, it is doable by extending optparse. There is even an example in
the very good "extending optik"[1] documentation available off the
sf.net site:

http://optik.sourceforge.net/

regards,

mike

[1]: optparse is also known as optik

Feb 26 '06 #4

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

8
2314
by: Hans-Joachim Widmaier | last post by:
I was really pleased when the Optik module found its way into the standard Python battery compartment, as it matched all my option parsing requirements. But, as always, there's really nothing that does all you ever want, especially when it comes to option parsing - there's just too many schemes to handle them all comfortably. With this program I'm working on, I started to recognize that not only the functionality should be delegated to...
3
3169
by: washu | last post by:
Hi, I'm was going through the module help located on http://docs.python.org/lib/optparse-store-action.html and I tried modifying it a tiny bit and things don't work. If someone could tell me what I'm doing wrong, I'd appreciate it. The script that works (based on the code on the webpage) is: #!/usr/bin/env python
7
2796
by: Henry Ludemann | last post by:
I've been writing an optparse alternative (using getopt) that is at a stage where I'd be interested in people's opinions. It allows you to easily creating command line interfaces to existing functions, using flags (which are optional) and arguments. It will automatically print a nicely formatted usage (eg: -h or --help), and easily & automatically validates parameter existence and type. You can download it, and read a bit more about it,...
3
2462
by: Karlo Lozovina | last post by:
If I create a file with only one line: --- from optparse import OptionParser --- I get this when I try to run it from "DOS" prompt: Traceback (most recent call last): File "optparse.py", line 1, in ?
0
1140
by: Steven Bethard | last post by:
I feel like I must be reinventing the wheel here, so I figured I'd post to see what other people have been doing for this. In general, I love the optparse interface, but it doesn't do any checks on the arguments. I've coded something along the following lines a number of times: class OptionArgParser(optparse.OptionParser): def __init__(self, *args, **kwargs): self.min_args = kwargs.pop('min_args', None) self.max_args =...
1
1781
by: Pupeno | last post by:
Hello, I am doing some extreme use of optparse, that is, extending it as explained on http://docs.python.org/lib/optparse-other-reasons-to-extend-optparse.html I have subclassed OptionParser and Option. MyOptionParser uses MyOption as option_class and in Python 2.4 it works. But I have to target Python 2.3. In Python 2.3 the help and version options seem to be created before even a parser is created and they are created using a hardcoded...
2
1709
by: mbeachy | last post by:
Some rather unexpected behavior in the set_default/set_defaults methods for OptionParser that I noticed recently: <Option at 0x-483b3414: -r/--restart> {'restart': None} {'retart': False, 'restart': None} Why does set_default not raise an exception when passed a key that it doesn't recognize?
3
2090
by: Dan | last post by:
I've been using optparse for a while, and I have an option with a number of sub-actions I want to describe in the help section: parser.add_option("-a", "--action", help=\ """Current supported actions: create, build, import, exp_cmd and interact. create -- Vaguely depreciated, should create a new project, but it is
0
928
by: Robert Kern | last post by:
Jeff Keasler wrote: If you code it up with unit tests and documentation, it has a good chance. But in the meantime, you can tell optparse to stop processing options using the standard "--" marker. For example: $ cat mycommand.py import optparse parser = optparse.OptionParser()
0
9796
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9643
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
1
10544
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
9327
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
6951
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5624
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
0
5790
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4425
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
3
3079
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.