argparse 2.2.0

• We now support the following ArgumentParser() methods:

  • format_help()
  • format_usage()
  • parse_intermixed_args() (#45)
  • parse_known_intermixed_args() (#45)
  • set_defaults() (#43). Suggestion of @oliverbothe.

• When an error is thrown by ArgumentParser()$parse_args() and interactive() is FALSE and getOption("error") is NULL then we now use a quieter default error handler that doesn’t output a trailing “Execution halted”.

• add_argument() now allows “numeric” as an alias for “double” for the type argument (#42). Suggestion of @dariober.

• ArgumentParser() now handles description arguments with newlines in them (#44). Thanks Arthur Gilly (@agilly) for bug report.

argparse 2.1.6

• The errors raised by ArgumentParser()$parse_args() are now of class “argparse_parse_error”.

  They are now less verbose when interactive() is FALSE (#40).

  There may still be a trailing “Execution halted” line output by R’s default error handler (when interactive() is FALSE). This can be silenced by setting a new error handler near the top of your Rscript e.g.

  if (!interactive())
      options(error=function(e) quit('no', status = 1, runLast = FALSE))

argparse 2.1.5

• add_argument now uses as.logical() logic to cast variables to logical values if type = "logical" and action = "store" or action = "append" instead of using Python’s bool() logic (#39).

  • We throw an error if we would get an NA by coercion.
  • We no longer throw a warning when using type = "logical" and action = "store" suggesting users instead use action = "store_true" or action = "store_false".

argparse 2.1.3

• Prevents extraneous error message from being included in usage message when using Python 3.10 (#36). Thanks @dariober for bug report.

argparse 2.1.2

• Fixes bug when using an argument with action == "append" and a non-NULL default value (#35). Thanks @miker985 for bug report.

argparse 2.1.1

• Parsers now support parse_known_args() (#34). Suggestion of David Lacalle Castillo (@WaterKnight1998).

argparse 2.0.4

• May now specify a named formatter_class argument (as a string) to a subparsers$add_parser() method. Thanks Regina (@oyxf) for bug report.
• May now specify positional arguments in ArgumentParser().

argparse 2.0.3

• Fixes bug when accidentally passing a positional argument to ArgumentParser() when using Python 3.9. Thanks Kurt Hornik for bug report.

argparse 2.0.1

• Improved passing of arguments to Python from R. In particular should fix bug in using add_help argument in ArgumentParser. Thanks George Chlipala for bug report.
• Removes getopt as a dependency.

argparse 2.0.0

• Now uses R6 classes instead of proto classes (#25).
  The typical user shouldn’t need to change any argparse code but I did make private the previously public python_code element of the object returned by ArgumentParser().
• Parsers now support add_subparsers (#14). Suggestion of Zebulun Arendsee.
• Parsers now support add_argument_group (#26).
  Suggestion of Dario Beraldi.
• Parsers now support add_mutually_exclusive_group (#23).
  Suggestion of Vince Reuter.

argparse 1.1.1

• Better support for machines only running Python 2.7.
  
• DESCRIPTION makes explicit that it requires version 1.0.0 of proto dependency.
  Thanks Christophe Poulet for bug report.

argparse 1.1.0

• Better support for Unicode arguments/options. Thanks Erick Rocha Fonseca for bug report.
• Fix bug when setting type='integer' in add_argument. Thanks Dominik Mueller for bug report and suggested solution.
• The package proto has been moved from Depends to Imports in DESCRIPTION. We now use jsonlite package instead of rjson to parse JSON.
• Better error message when accidentally trying to define a positional argument in ArgumentParser() Suggestion of Alex Reinhart.
• Other error message output when an parsing error is detected have been tweaked slightly.

argparse 1.0.7

• Now supports showing program’s version with action='version'. Suggestion of Dario Beraldi.
• Fix bug when setting required=FALSE in add_argument. Thanks Claire D. McWhite for bug report.

argparse 1.0.4

• You can now pass in a character vector to the metavar argument of add_argument. Thanks Paul Newell for bug report and a patch.
• add_argument now throws a warning recommending using action “store_true” or “store_false” if type set to “logical” and action set to “store”.
  Suggestion of Martí Duran Ferrer
• You can now explicitly set a NULL default in add_argument.
  Previously one could only implicitly set a NULL default by not setting any default at all. Suggestion of Hyunsoo Kim.
• Fixes parsing bug when using a very large argument list.
  Thanks Taylor Pospisil for bug report.
• Parse error usage message now prints to standard error.
  User requested help message quit status is now zero.
  Thanks to PlasmaBinturong for report/request.
• If Python script fails with error pass on error message to user. Thanks to Martí Duran Ferrer for report/request.

argparse 1.0.1

• Fix minor bug when running package tests on machines with both old and new versions of Python. Thanks Prof. Brian Ripley for bug report.

argparse 1.0.0

• Some support for choices argument in parser$add_argument. Thanks Christopher Small for report/request.
• Some support for formatter_class argument in ArgumentParser. Thanks Costas Bouyioukos for report/request.
• Package now looks for Python binaries with findpython::find_python_cmd which is a little bit more robust than the previous argparse::find_python_cmd.
• If interactive() == TRUE then parse_args will no longer quit(status=1) after printing a help message but will instead throw an error. argparse will continue to quit(status=1) after printing a help message for non-interactive Rscripts.

argparse 0.5.3

• Fix bug in parser$add_argument for case when we specify a default vector instead of scalar. Thanks Martin Diehl for bug report.
• find_python_cmd will now also look for a python2.7 binary.
• Website moved to https://github.com/trevorld/argparse