NameError: name 'in_addr' is not defined

Hello i keep having this error when using mac with google colab

Mac:

NameError Traceback (most recent call last) in 1 print('Copy-paste to the terminal the command below and run (press Enter)\n') 2 print('Mac:') ----> 3 print(f'./run_mac.sh --is-client --in-addr {in_addr} --out-addr {out_addr}') 4 print('\nWindows:') 5 print(f'run_windows.bat --is-client --in-addr {in_addr} --out-addr {out_addr}')

NameError: name 'in_addr' is not defined

Every other things get's connected except this.

Thanks