def get_pip_freeze()
      pip_path = ::File.join(@name, 'bin', 'pip')
      tmp = @runner.run_command("#{pip_path} freeze")
      @pip_freeze = Hash.new()
      if tmp.exit_status.to_i != 0
        return @pip_freeze
      end
      lines = tmp.stdout.split("\n")
      lines.each do |line|
        line.strip!
        if line =~ /^-e /
          @pip_freeze[line] = ''
          next
        end
        parts = line.split(/==/)
        @pip_freeze[parts[0]] = parts[1]
      end
      @pip_freeze
    end
def get_pip_freeze()
      pip_path = ::File.join(@name, 'bin', 'pip')
      tmp = @runner.run_command("#{pip_path} freeze")
      @pip_freeze = Hash.new()
      if tmp.exit_status.to_i != 0
        return @pip_freeze
      end
      lines = tmp.stdout.split("\n")
      lines.each do |line|
        line.strip!
        if line =~ /^-e /
          @pip_freeze[line] = ''
          next
        end
        parts = line.split(/==/)
        @pip_freeze[parts[0]] = parts[1]
      end
      @pip_freeze
    end
Get a hash for the `pip freeze` output; set @pip_freeze

 @api private
 @return [nil]