[转]Python的控制流

 if 语句的基本语法

if(expression one):
    # Action to take if expression one evaluates True
else:
    # Action to take if all expression one evaluates False

还包括elif

 

while 循环的伪代码

while (expression):
    # statements to execute while loop expression is True
else:
    # statements to execute when loop expression is False

 

 

for 循环的伪代码

for item in container:
    # action to repeat for each item in the container
else:
    # action to take once we have finished the loop.