擅长:python、mysql、java
<p>为了说明该概念(无错误检查,无功能):</p>
<pre><code>if __name__ == '__main__':
habits = {
'Habit1': {'days': 1},
'Habit2': {'days': 5}
}
print('You have following habits:')
for index, habit in enumerate(habits, 1):
print(f'{index}. {habit} - {habits[habit]["days"]} day(s)')
i = int(input(f'Select habit to increment (1 - {len(habits)}): '))
habit_from_input = list(habits.keys())[i-1]
habits[habit_from_input]['days'] += 1
print('You have following habits:')
for index, habit in enumerate(habits, 1):
print(f'{index}. {habit} - {habits[habit]["days"]} day(s)')
</code></pre>