find_python_cmd: Find a suitable python cmd or give error if not possible

In findpython: Functions to Find an Acceptable Python Binary

Find a suitable python cmd or give error if not possible

Description

find_python_cmd() finds a suitable python cmd or raises an error if not possible

Usage

find_python_cmd(
  minimum_version = NULL,
  maximum_version = NULL,
  required_modules = NULL,
  error_message = NULL
)

Arguments

minimum_version	The minimum version of python it should be. Should be a string with major and minor number separated by a .. If left NULL won't impose such a restriction.
maximum_version	The maximum version of python it should be. Should be a string with major and minor number separated by a .. If left NULL won't impose such a restriction.
required_modules	Which modules should be required. Can use a single | to represent a single either-or requirement like "json|simplejson". If left NULL won't impose such a restriction.
error_message	What error message the user will see if couldn't find a sufficient python binary. If left NULL will print out a default message.

Value

The path to an appropriate python binary. If such a path wasn't found then it will throw an error.

See Also

can_find_python_cmd() for a wrapper which doesn't throw an error

Examples

try(find_python_cmd())
try(find_python_cmd(minimum_version = "2.6", maximum_version = "2.7"))
try(find_python_cmd(required_modules = c("argparse", "json | simplejson")))

findpython documentation built on April 4, 2025, 2:35 a.m.