Python: if else in a list comprehension Python's conditional expression isa if C else band can't be used as: 1[aforiinitemsifCelseb] The right form is: 1[aifCelsebforiinitems] Even though there is a valid form: 1[aforiinitemsifC] But that isn't the same as that is how you fil...
3. List Comprehension using If-else We use anif-elsestatement within a list comprehension expression. This allows us to choose between two possible outcomes for each item in the iterable. It’s a useful feature for cases where we need to apply different transformations or labels to the element...
高效Python90条之第19条 不要把函数返回的多个数值拆分到三个以上的变量中 要点 函数可以把多个值合起来通过一个元组返回给调用者,以便利用Python的unpacking机制去拆分。对于函数返回的多个值,可以把普通变量没有捕获到的那些值全都捕获到一个带星号的变量里。把… ByteJ...发表于Pytho... 详谈python中的小数运算...
# 上面的例子可以简化为: my_list = [i*iforiinrange(1,11)]print(my_list) 涉及到if statement时:(if statement在最后) #输出[1,10]中的偶数my_list = [iforiinrange(1,11)ifi%2 ==0]print(my_list) 涉及到if-else语句时: #输出[1,10]中的偶数my_list = [iifi%2 == 0else"Python"f...
age if age>15 else age+1 for age in ages ] print(ages)双层for循环的列表推导式也是可以的list...
newlist = [xifx !="banana"else"orange"forxinfruits] Try it Yourself » Theexpressionin the example above says: "Return the item if it is not banana, if it is banana return orange". Track your progress - it's free! Log inSign Up...
Python Syntax new_list = [true_expr if conditional else false_expr for member in iterable] By placing the conditional logic at the beginning of a list comprehension, you can use conditional logic to select from multiple possible output options. For example, if you have a list of prices, ...
So this list comprehension: >>>short_names=[name.title()fornameinscreencastsiflen(name)<=30] Is equivalent to thisforloop: >>>short_names=[]>>>fornameinscreencasts:...iflen(name)<=30:...short_names.append(name.title())...
If even, it appends the number in the list. Note: The range() function generates a sequence of numbers. To learn more, visit Python range(). if...else With List Comprehension Let's use if...else with list comprehension to find even and odd numbers. numbers = [1, 2, 3, 4, 5...
infront.py #!/usr/bin/python data = ["even" if i % 2 == 0 else "odd" for i in range(7)] print(data) In the example, we transform the values into"even"and"odd"values using the list comprehension. $ ./infront.py ['even', 'odd', 'even', 'odd', 'even', 'odd', 'even...