How to read python documentation?

For example we will read documentation for tuple:

$ python3 -m pydoc tuple

Installing new python3.10 version to server

Installing new version ex: python3.10and running:

virtualenv --python=/usr/bin/python3.10 ven

will encounter 

he following packages were automatically installed and are no longer required:
  libdvdnav4 libdvdread7 libegl-mesa0 libegl1 libfwupdplugin1 libjansson4 libldb2 liblua5.2-0 libpython3.11-minimal libpython3.11-stdlib libsmbclient libtalloc2 libtevent0 libva-wayland2 libwbclient0 libxmlb1
  mpv python3-ldb python3-pyxattr python3-talloc python3.11-minimal rtmpdump samba-libs

What you need is this:

$ sudo apt-get install python3.10-distutils

Also pip will complain:

    from pip._vendor import html5lib, requests
ImportError: cannot import name 'html5lib' from 'pip._vendor' (/home/sup/scripts/Ton/lave_telegram_bot/venv/lib/python3.10/site-packages/pip/_vendor/__init__.py)

 

$ curl -sS https://bootstrap.pypa.io/get-pip.py | python3.10

 

Another pip error

      compilation terminated.
      error: command '/usr/bin/x86_64-linux-gnu-gcc' failed with exit code 1
      [end of output]
 
  note: This error originates from a subprocess, and is likely not a problem with pip.
  ERROR: Failed building wheel for crc16

Fix:

$ sudo apt install python3.10-dev

How to debug with chrome developer tools

 Great guide here

python structs and bytes

Comprehensive video about str and bytes

Script to get ICMP packet data:

https://gist.github.com/Paulius11/a49d9c8443d7477bb546f85c4a098d9f

Working with TCP/IP protocol stack:

 

Ethernet Frame Format 

 

eth_header=struct.unpack('!6s6sH', data)

 

 

Internet Protocol Header

Internet Protocol header struct - !BBHHHBBH4s4s

 

 

 

# s    char[]    bytes

# H (unsigned short) Integer  = 2 (standard octets)

# B Integer  = 1 (standard octets)

eth_header=struct.unpack('!6s6sH', data)

icmp_type, code, checksum, packet_id, sequence = struct.unpack('!BBHHH', packet[20:28])

https://www.binarytides.com/python-packet-sniffer-code-linux/ -

https://www.bitforestinfo.com/blog/02/15/how-to-write-simple-packet-sniffer.html