两个Python关键字continue和pass之间有什么显著的区别吗
for element in some_list:
if not element:
pass
and
for element in some_list:
if not element:
continue
我应该注意的?
两个Python关键字continue和pass之间有什么显著的区别吗
for element in some_list:
if not element:
pass
and
for element in some_list:
if not element:
continue
我应该注意的?
当前回答
是的,这是有区别的。Continue实际上跳过了当前循环迭代的其余部分(返回到开始)。Pass是一个空语句,不执行任何操作。
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其他回答
x = [1,2,3,4]
for i in x:
if i==2:
pass #Pass actually does nothing. It continues to execute statements below it.
print "This statement is from pass."
for i in x:
if i==2:
continue #Continue gets back to top of the loop.And statements below continue are executed.
print "This statement is from continue."
输出为
>>> This statement is from pass.
同样,让我们运行相同的代码,只做了一些小更改。
x = [1,2,3,4]
for i in x:
if i==2:
pass #Pass actually does nothing. It continues to execute statements below it.
print "This statement is from pass."
for i in x:
if i==2:
continue #Continue gets back to top of the loop.And statements below continue are executed.
print "This statement is from continue."
输出为-
>>> This statement is from pass.
This statement is from pass.
This statement is from pass.
This statement is from pass.
This statement is from continue.
This statement is from continue.
This statement is from continue.
Pass什么都不做。计算不受影响。但是继续返回到循环的顶部继续进行下一个计算。
Continue将跳转回循环的顶部。Pass将继续处理。
如果pass位于循环的末尾,则差异可以忽略不计,因为流无论如何都会返回到循环的顶部。
Pass只是继续循环或条件。它什么都不做。不过,Continue用于跳过当前迭代,并进入下一个迭代。
你可能会问,如果不需要,为什么要使用pass呢?考虑以下情况:
text = "I am a coder."
if text == "I am not a coder.":
print("Programming is interesting! You should try it out!")
elif text == "I am a coder.":
pass
Pass只是一个语法占位符,用来填充一些空间。如果在检查出特定条件时不想做任何事情,可以使用pass作为占位符。在Python中不能只编写空的条件、循环或函数。
可以这样考虑:
通过:Python只处理缩进!不像其他语言,这里没有空花括号。
因此,如果你想在条件为真时什么都不做,除了pass没有其他选择。
Continue:这只在循环的情况下有用。在这种情况下,对于一定范围的值,您不想在特定传递的条件为真之后执行循环的剩余语句,那么您将必须使用continue。
它们之间有区别,continue跳过循环的当前迭代并执行下一个迭代。Pass什么都不做。它是一个空语句占位符。 我想给你们举个例子,能更好地说明这一点。
>>> some_list = [0, 1, 2]
... for element in some_list:
... if element == 1:
... print "Pass executed"
... pass
... print element
...
0
Pass executed
1
2
... for element in some_list:
... if element == 1:
... print "Continue executed"
... continue
... print element
...
0
Continue executed
2