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author | Kevin Van Brunt <kmvanbrunt@gmail.com> | 2020-04-23 17:34:04 -0400 |
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committer | Kevin Van Brunt <kmvanbrunt@gmail.com> | 2020-04-23 17:34:04 -0400 |
commit | 6deb39d75f785e40daaa14ef033bf5797f42944f (patch) | |
tree | ba1d1995f2f8b312e431e63062562fc339009339 | |
parent | 5fd8e00010e068eb0632b6cb20860a18774181a5 (diff) | |
download | cmd2-git-6deb39d75f785e40daaa14ef033bf5797f42944f.tar.gz |
Updated tab completion documentation
-rwxr-xr-x | README.md | 12 | ||||
-rw-r--r-- | docs/features/completion.rst | 43 | ||||
-rwxr-xr-x | examples/basic_completion.py | 2 |
3 files changed, 48 insertions, 9 deletions
@@ -171,16 +171,18 @@ Instructions for implementing each feature follow. - And also provide help hints for values associated with these flags - Experiment with the [argprint.py](https://github.com/python-cmd2/cmd2/blob/master/examples/arg_print.py) example using the **oprint** and **pprint** commands to get a feel for how this works + - `basic_complete` helper method for tab completion against a list - `path_complete` helper method provides flexible tab completion of file system paths - See the [paged_output.py](https://github.com/python-cmd2/cmd2/blob/master/examples/paged_output.py) example for a simple use case - See the [python_scripting.py](https://github.com/python-cmd2/cmd2/blob/master/examples/python_scripting.py) example for a more full-featured use case - - `flag_based_complete` helper method for tab completion based on a particular flag preceding the token being completed - - See the [basic_completion.py](https://github.com/python-cmd2/cmd2/blob/master/examples/basic_completion.py) example for a demonstration of how to use this feature - - `index_based_complete` helper method for tab completion based on a fixed position in the input string - - See the [basic_completion.py](https://github.com/python-cmd2/cmd2/blob/master/examples/basic_completion.py) example for a demonstration of how to use this feature - - `basic_complete` helper method for tab completion against a list - `delimiter_complete` helper method for tab completion against a list but each match is split on a delimiter - See the [basic_completion.py](https://github.com/python-cmd2/cmd2/blob/master/examples/basic_completion.py) example for a demonstration of how to use this feature + - `flag_based_complete` helper method for tab completion based on a particular flag preceding the token being completed + - `index_based_complete` helper method for tab completion based on a fixed position in the input string + - See the [basic_completion.py](https://github.com/python-cmd2/cmd2/blob/master/examples/basic_completion.py) example for a demonstration of how to use these features + - `flag_based_complete()` and `index_based_complete()` are basic methods and should only be used if you are not + familiar with argparse. The recommended approach for tab completing positional tokens and flags is to use + argparse-based completion - `cmd2` in combination with `argparse` also provide several advanced capabilities for automatic tab completion - See the [argparse_completion.py](https://github.com/python-cmd2/cmd2/blob/master/examples/argparse_completion.py) example for more info diff --git a/docs/features/completion.rst b/docs/features/completion.rst index 0735893a..c15ceb13 100644 --- a/docs/features/completion.rst +++ b/docs/features/completion.rst @@ -34,7 +34,42 @@ similar to the following to your class which inherits from :class:`cmd2.Cmd`:: complete_bar = functools.partialmethod(cmd2.Cmd.path_complete, path_filter=os.path.isdir) -Raising exceptions during completion +Included Tab Completion Functions +--------------------------------- +``cmd2`` provides the following tab completion functions + +- :attr:`cmd2.utils.basic_complete` - helper method for tab completion against + a list +- :attr:`cmd2.Cmd.path_complete` - helper method provides flexible tab + completion of file system paths + + - See the paged_output_ example for a simple use case + - See the python_scripting_ example for a more full-featured use case + +- :attr:`cmd2.Cmd.delimiter_complete` - helper method for tab completion + against a list but each match is split on a delimiter + + - See the basic_completion_ example for a demonstration of how to use + this feature + +- :attr:`cmd2.Cmd.flag_based_complete` - helper method for tab completion based + on a particular flag preceding the token being completed +- :attr:`cmd2.Cmd.index_based_complete` - helper method for tab completion + based on a fixed position in the input string + + - See the basic_completion_ example for a demonstration of how to use these + features + - ``flag_based_complete()`` and ``index_based_complete()`` are basic + methods and should only be used if you are not familiar with argparse. + The recommended approach for tab completing positional tokens and flags + is to use argparse-based_ completion. + +.. _paged_output: https://github.com/python-cmd2/cmd2/blob/master/examples/paged_output.py +.. _python_scripting: https://github.com/python-cmd2/cmd2/blob/master/examples/python_scripting.py +.. _basic_completion: https://github.com/python-cmd2/cmd2/blob/master/examples/basic_completion.py + + +Raising Exceptions During Completion ------------------------------------ There are times when tab completion fails and a message needs to be reported to the user. These include the following example cases: @@ -52,10 +87,12 @@ member called ``apply_style``. Set this False if the error style should not be applied. For instance, ``ArgparseCompleter`` sets it to False when displaying completion hints. -Tab Completion Using Argparse Decorators +.. _argparse-based: + +Tab Completion Using argparse Decorators ---------------------------------------- -When using one the Argparse-based :ref:`api/decorators:cmd2.decorators`, +When using one the argparse-based :ref:`api/decorators:cmd2.decorators`, ``cmd2`` provides automatic tab completion of flag names. Tab completion of argument values can be configured by using one of five diff --git a/examples/basic_completion.py b/examples/basic_completion.py index 9523ac67..f33029c9 100755 --- a/examples/basic_completion.py +++ b/examples/basic_completion.py @@ -4,7 +4,7 @@ A simple example demonstrating how to enable tab completion by assigning a completer function to do_* commands. This also demonstrates capabilities of the following completer features included with cmd2: - CompletionError exceptions -- delimiter_completer() +- delimiter_complete() - flag_based_complete() (see note below) - index_based_complete() (see note below) |