Searching for a channel from the log using regular expressions?

Question

Python

There is such a log after executing the command
iwlist wlp2s0 scan > wifiscan.log
After the user enters the WI-FI MAC address, you need to display the channel number of the access point ...

mac_ = input("Enter mac addres: ")
???

How can I parse the channel number using the re module?

wlp2s0    Scan completed :
          Cell 01 - Address: 00:11:22:33:44:55
                    Channel:3
                    Frequency:2.422 GHz (Channel 3)
                    Quality=39/70  Signal level=-71 dBm  
                    Encryption key:on
                    ESSID:"My Network"
                    Bit Rates:1 Mb/s; 2 Mb/s; 5.5 Mb/s; 11 Mb/s; 9 Mb/s
                              18 Mb/s; 36 Mb/s; 54 Mb/s
                    Bit Rates:6 Mb/s; 12 Mb/s; 24 Mb/s; 48 Mb/s
                    Mode:Master
                    Extra:tsf=00000035026f3a00
                    Extra: Last beacon: 64ms ago
                    IE: Unknown: 000A546167746162617A6172
                    IE: Unknown: 010882848B961224486C
                    IE: Unknown: 030103
                    IE: Unknown: 2A0100
                    IE: Unknown: 32040C183060
                    IE: Unknown: 2D1AEC1117FFFF000001000000000000000000000000000000000000
                    IE: Unknown: 3D1603000000000000000000000000000000000000000000
                    IE: IEEE 802.11i/WPA2 Version 1
                        Group Cipher : CCMP
                        Pairwise Ciphers (1) : CCMP
                        Authentication Suites (1) : PSK
                    IE: Unknown: 7F080000000100000000
                    IE: Unknown: DD180050F2020101000003A4000027A4000042435E0062322F00
                    IE: Unknown: 4A0E14000A002C01C800140005001900
                    IE: Unknown: 7F080000000100000000
                    IE: Unknown: DD740050F204104A0001101044000102103B00010310470010BC329E001DD811B2860134E894E04BC61021000754502D4C494E4B102300044144534C102400065254323836301042000831323334353637381054000800060050F20400011011000954442D57383936314E100800020084103C000101
                    IE: Unknown: DD07000C4300000000

Answer 1

iwlist wlp2s0 scan | grep -oP "(?<=Channel:)\d+"

Answer 2

Why do you need regular expressions here, if you can just rattle on the necessary parameter names and then reveal the excess with some kind of awk?