I have this set up on a pi to which a laptop is connected. The pi has a wifi and a wired interface, and the wired interface is connected directly to a laptop.

The pi is running the python DHCP server, whilst the laptop is requesting an IP

I can see the DHCP discovery messages coming in from the laptop to the Pi, and the Pi responds with an offer

However, the offer is never accepted - there seems to be no REQUEST message sent in response by the laptop - so the logs on the pi show a continuous stream of "DHCPDISCOVER", "DHCPOFFER"

discover:
Message Type: 1
client MAC address: 00:0E:C6:CA:BC:35
client IP address: 0.0.0.0
your IP address: 0.0.0.0
next server IP address: 0.0.0.0
client identifier: 01:00:0E:C6:CA:BC
dhcp message type: DHCPDISCOVER
host name: ben-laptop
maximum dhcp message size: 576
parameter request list: [1, 2, 6, 12, 15, 26, 28, 121, 3, 33, 40, 41, 42, 119, 249, 252, 17]

new ip: 192.168.2.6
add 00:0E:C6:CA:BC:35 192.168.2.6 ben-laptop
broadcasting:
Message Type: 2
client MAC address: 00:0E:C6:CA:BC:35
client IP address: 0.0.0.0
your IP address: 192.168.2.6
next server IP address: 0.0.0.0
broadcast address: 255.255.255.255
client identifier: 00:0E:C6:CA:BC:35
dhcp message type: DHCPOFFER
ip address lease time: 300
subnet mask: 255.255.255.0

Running wireshark on the laptop - the one issuing the DISCOVER messages, I can see the DHCPOFFER, but it seems a REQUEST response is never sent

Dynamic Host Configuration Protocol (Offer)
Message type: Boot Reply (2)
Hardware type: Ethernet (0x01)
Hardware address length: 6
Hops: 0
Transaction ID: 0x2eb6bcda
Seconds elapsed: 0
Bootp flags: 0x0001 (Unicast)
Client IP address: 0.0.0.0
Your (client) IP address: 192.168.2.6
Next server IP address: 0.0.0.0
Relay agent IP address: 0.0.0.0
Client MAC address: AsixElec_ca:bc:35 (00:0e:c6:ca:bc:35)
Client hardware address padding: 00000000000000000000
Server host name not given
Boot file name not given
Magic cookie: DHCP
Option: (1) Subnet Mask (255.255.255.0)
Length: 4
Subnet Mask: 255.255.255.0
Option: (28) Broadcast Address (192.168.2.255)
Length: 4
Broadcast Address: 192.168.2.255
Option: (51) IP Address Lease Time
Length: 4
IP Address Lease Time: (300s) 5 minutes
Option: (53) DHCP Message Type (Offer)
Length: 1
DHCP: Offer (2)
Option: (61) Client identifier
Length: 6
Type: 0
Client Identifier: \016���5
Option: (255) End
Option End: 255