Split the array by anything that isn't a letter

I have a class that will check a users environment to find out if they have python installed, the classes purpose is to check if the user has multiple versions of python installed and to not default to three:

class CheckForPythonicVariables

  class << self

    def find_python_env_var
      py_path = []  # Results of the python env variables
      env_vars = ENV.to_h
      items = env_vars["Path"].split(";")  # Split the environment variables into an array
      items.each { |var|
        if var.to_s.include?("Python")  # Do you have python?
          py_path.push(var)
        end
      }
      py_path.each { |python|
        if python.include?("Python27")  # Python 2.7.x?
          return true
        elsif python.include?("Python3")  # Python 3.x.x?
          return false
        else
          raise "You do not have python installed"
        end
      }
    end

  end

end

Now this works, but it only works on Windows and a select few Linux OS, apparently Parrot is not one of them. Is there a way I can #split() the environment variables by anything that is not a letter? For example:

Windows env var: C:\Python27\;C:\Python27\Scripts;C:\ProgramData\Oracle\Java\javapath Parrot OS env var: /usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games

Note how the variables are split by either a semi-colon(;) or a colon(:), is there a way I could use the #split() function in ruby and split by anything that is not alphanumerical characters, or number? Or is there a better way to make sure that the user has python 2.7.x in their environment variables?

This regular expression matches all non-alphanumeric characters: /[^a-zA-Z0-9]/.

If you want to match all non-alphanumeric characters excluding forward-slash and backslash, use /[^a-zA-Z0-9\/\\]/.

Examples:

str = 'C:\Python27\;C:\Python27\Scripts;C:\ProgramData\Oracle\Java\javapath'
str.split /[^a-zA-Z0-9\/\\]/
# => ["C", "\\Python27\\", "C", "\\Python27\\Scripts", "C", "\\ProgramData\\Oracle\\Java\\javapath"]

str = '/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games'
str.split /[^a-zA-Z0-9\/\\]/
# => ["/usr/local/bin", "/usr/bin", "/bin", "/usr/local/games", "/usr/games"]