else，但是$\large\color{red}P\large\color{orange}y\large\color{yellow}t\large\color{green}h\large\color{cyan}o\large\color{blue}n\large\color{purple}3$

1 . if-else型:

>>> if False:
...     print('T')
... else:
...     print('F')
F

2 . for-else型:

>>> # 自然结束执行else
>>> x = int(input())
5
>>> for i in range(10):
...     if i == x:
...         break
... else:
...     print('else')
>>> for i in range(3):
...     if i == x:
...         break
... else:
...     print('else')
else

3 . try-except-finally-else型:

>>> # 无错误执行else
>>> try:
...     1 / 0
... except:
...     pass
... else:
...     print('else')
>>> try:
...     pass
... except:
...     pass
... else:
...     print('else')
else