Python CLI libraries analysis

An analysis of several Python CLI libraries to detect their usability in various cases.


We want to design a command with following usage based on compilation of several existing commands:

Usage: testcli [options] [--choices=VALUE]... [--params=...] create <label>
       testcli [options] [--choices=VALUE]... [--params=...] drop <label>
       testcli -h | --help
       testcli --version

  -h, --help             Show this help message and exit.
  --version              Show program's version number and exit.
  --config=FILE          Set config file.
  --string=STRING        Set custom string.
  --number=NUMBER        Set custom number.
  --params=KEY=VALUE     Set custom parameters.
  --today=DATE           Set custom today [default: today].
  --choices=VALUE        Set custom choices [default: all]. Available options: 'all', 'foo', 'bar', 'baz'.
  -n, --dry-run          Don't actually do anything.
  -v,--verbosity=LEVEL   Set verbosity level in range 0 to 3 [default: 1].

Improving DNS Server Telemetry

Since the end of January 2021, the data from all authoritative DNS servers operated by CZ.NIC about DNS transactions (queries and responses) is being collected exclusively using the new standard Compacted-DNS (C-DNS) format defined in RFC 8618.  For data acquisition on the servers we use the DNS Probe software, developed by CZ.NIC Labs in cooperation with Brno Technical University. This milestone marks the end of a six-month transition period in which we migrated all servers from the traditional PCAP format that we used previously. During that period we heavily tested and improved the performance and stability of DNS Probe, and also compared the results obtained in both the old and new format.