向这里的专家寻求帮助,以帮助在我正在创建的程序中做出正确的选择。两种创建列表的方法中哪一种对您来说更像 Pythonic 和可读性更强?还是有更好的方法可以做到这一点?
方法 #1 - 列表理解
def test_func(*args):
s = 'Country name: United {nm}'
l = [s.format(nm='States') if x is 'us'
else s.format(nm='Arab Emirates') if x is 'uae'
else s.format(nm='Kingdom') if x is 'uk'
else 'Unknown' for x in args]
return l
# execute
test_func('us', 'uk', 'uae')
# results
['Country name: United States',
'Country name: United Kingdom',
'Country name: United Arab Emirates']
方法 #2 - for 循环
def test_func(*args):
s = 'Country name: United {nm}'
l = []
for arg in args:
if arg is 'us':
l.append(s.format(nm='States'))
elif arg is 'uk':
l.append(s.format(nm='Kingdom'))
elif arg is 'uae':
l.append(s.format(nm='Arab Emirates'))
else:
l.append(s.format(nm='Unknown'))
return l
# execute
test_func('us', 'uk', 'uae')
# results
['Country name: United States',
'Country name: United Kingdom',
'Country name: United Arab Emirates']
最佳答案
您在错误的级别进行映射。使用像这样的字典:
代码:
def test_func(*args):
mapping = {
'us': 'United States',
'uae': 'United Arab Emirates',
'uk': 'United Kingdom',
}
return ['Country name: {}'.format(mapping.get(x, 'Unknown')) for x in args]
# execute
print(test_func('us', 'uk', 'uae', 'xyzzy'))
结果:
[
'Country name: United States',
'Country name: United Kingdom',
'Country name: United Arab Emirates',
'Country name: Unknown'
]
关于Python3 帮助确定动态创建列表的大多数 pythonic 方法,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52107592/