使用 python 重写 if-else 语句,如 javascript 对象字面量
Use python to rewrite if-else statements like javascript object literals
这里是 javascript.
中 if-else 语句的例子
function getTranslation(rhyme) {
if (rhyme.toLowerCase() === "apples and pears") {
return "Stairs";
} else if (rhyme.toLowerCase() === "hampstead heath") {
return "Teeth";
} else if (rhyme.toLowerCase() === "loaf of bread") {
return "Head";
} else if (rhyme.toLowerCase() === "pork pies") {
return "Lies";
} else if (rhyme.toLowerCase() === "whistle and flute") {
return "Suit";
}
return "Rhyme not found";
}
更优雅的方法是使用对象重写 if-else 实现。
function getTranslationMap(rhyme) {
const rhymes = {
"apples and pears": "Stairs",
"hampstead heath": "Teeth",
"loaf of bread": "Head",
"pork pies": "Lies",
"whistle and flute": "Suit",
};
return rhymes[rhyme.toLowerCase()] ?? "Rhyme not found";
}
python 可以用来编写类似于 javascript 对象字面量的优雅代码吗?
我正在使用 python 3.8
Javascript代码段来自下面link;
Python相当于:
def get_translation_map(rhyme):
rhymes = {
"apples and pears": "Stairs",
"hampstead heath": "Teeth",
"loaf of bread": "Head",
"pork pies": "Lies",
"whistle and flute": "Suit"
}
return rhymes.get(rhyme.lower(), "Rhyme not found")
如果您不知道 dict
的内容并希望确保始终返回一个值,另一个有用的变体:
v = adict.get('whatever') or 'default'
即使在 dict
中有一个具有 None 值的键,也会得到一个默认值
这里是 javascript.
中 if-else 语句的例子function getTranslation(rhyme) {
if (rhyme.toLowerCase() === "apples and pears") {
return "Stairs";
} else if (rhyme.toLowerCase() === "hampstead heath") {
return "Teeth";
} else if (rhyme.toLowerCase() === "loaf of bread") {
return "Head";
} else if (rhyme.toLowerCase() === "pork pies") {
return "Lies";
} else if (rhyme.toLowerCase() === "whistle and flute") {
return "Suit";
}
return "Rhyme not found";
}
更优雅的方法是使用对象重写 if-else 实现。
function getTranslationMap(rhyme) {
const rhymes = {
"apples and pears": "Stairs",
"hampstead heath": "Teeth",
"loaf of bread": "Head",
"pork pies": "Lies",
"whistle and flute": "Suit",
};
return rhymes[rhyme.toLowerCase()] ?? "Rhyme not found";
}
python 可以用来编写类似于 javascript 对象字面量的优雅代码吗?
我正在使用 python 3.8
Javascript代码段来自下面link;
Python相当于:
def get_translation_map(rhyme):
rhymes = {
"apples and pears": "Stairs",
"hampstead heath": "Teeth",
"loaf of bread": "Head",
"pork pies": "Lies",
"whistle and flute": "Suit"
}
return rhymes.get(rhyme.lower(), "Rhyme not found")
如果您不知道 dict
的内容并希望确保始终返回一个值,另一个有用的变体:
v = adict.get('whatever') or 'default'
即使在 dict