语法:for each in dict1.items(): (或者 for key,value in dict1.items():) dict1 = {"name": "jay", "age": 28, "hobby": "sing"} for each in dict1.items():#遍历所有的键值对 print(each) for key,value in dict1.items(): print('key:valuse是{}'.format(key,value)) """ ('...
if name.startswith('china'): print 'welcome to {}'.format(name) elif name.startswith('japan'): print 'say you {}'.format(name) else: print '输入有误,重新输入' print '游戏结束--->'
Python在运行一个文件时,会查看所有顶格写的代码。一个完整的if表达式只会看某一个满足条件的语句 '''3.求三个整数中的最大值 提示:定义 3 个变量'''#先自定义3个变量并赋值num1=6num2=10num3=20ifnum1>num2:ifnum1>num3:print('最大值为:{}'.format(num1))else:ifnum2>num3:print('最大值...
a=5print("你输入的是{}位数".format(a))elifnum > 1000: a=4print("你输入的是{}位数".format(a))elifnum>100: a=3print("你输入的是{}位数".format(a))elifnum>10: a=2print("你输入的是{}位数".format(a))else: a=1print("你输入的是{}位数".format(a)) pre=0foriinrange(a,0,...
in写在if python python if i in range,1.range()是一个函数foriinrange()就是给i赋值:比如foriinrange(1,3):就是把1,2依次赋值给irange()函数的使用是这样的:range(start,stop[,step]),分别是起始、终止和步长举例:range(3)即:从0到3,不包含3,即0,1,2>>
deftest_demo01():n=1whileTrue:print("当前的的值为{}".format(n))n+=1ifn==4:pytest.skip("跳过的值为{}".format(n)) 三 skipif 语法:@pytest.mark.skipif(self,condition, reason=None)。 说明:跳过执行测试用例,condition参数为条件,可选参数reason,跳过的原因,会在执行结果中打印。
python datetime 假设我有两种类型的datetime格式需要检查,它们是: %Y-%m-%dT%H:%M:%S.%f%z %Y-%m-%d 并将它们转换成这种格式%Y-%m-%d %H:%M:%S UTC。 我的代码目前只能检查一个条件: if val is None: val2 = val else: val2 = datetime.strptime(val, '%Y-%m-%dT%H:%M:%S.%f%z').__format...
This one-liner approach retains the same functionality but in a more concise format. Ternary Operator in Pythonif...else Python doesn't have a ternary operator. However, we can useif...elseto work like a ternary operator in other languages. For example, ...
continue ... else: ... print("{} is odd number".format(a)) ... a -= 1 .....
模块Bfrompackage01importAprint('你好，我是模块B……')print('模块B中__name__的值：{}'.format...