I don't know why I always get an error

Question

import urllib.request,json
city=input()
k='https://api.openweathermap.org/data/2.5/weather?q={}&units=metric&appid=af50bbd7309f973b6a2318253e78ad20'.format(city);
api=urllib.request.urlopen(k)
api_data=api.read()
api_data_info=api_data.decode()
a=json.loads(api_data_info)
des=a['weather'][0]['description']
temp=a['main']['temp']
temp_min=a['main']['temp_min']
temp_max=a['main']['temp_max']
humidity=a['main']['humidity']
sun_rise=a['sys']['sunrise']
sun_set=a['sys']['sunset']

print('Weather Report of : {}'.format(city).center(40))
print('\n---------------------')
print('---------------------\n')
print('Description : {}'.format(des))
print('Temperature : {}'.format(temp))
print(f'Minimum temperature : {temp_min}°C')
print(f'Maximum temperature : {temp_max}°C')
print(f'Humidity : {humidity}°C')
print(f'Sun Rise : {sun_rise}')
print(f'Sun Set : {sun_set}')

print('\n-------------------')
print('Thanks for having a look at this code')
print('-------------------\n')

Answer 1

I get error 401. Looks like its an invalid api key

Answer 2

Tag Python rather than just 'g' ☝
Proper tags improve context clarity and search-ability 👍