寻求专家的帮助，以帮助在我正在创建的程序中做出正确的选择。创建列表的两种方法中哪一种对您来说更具有 Python 风格和可读性？或者有没有更好的方法可以做到这一点？
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']
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']
您在错误的级别映射。使用像这样的字典：
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'))
[
'Country name: United States',
'Country name: United Kingdom',
'Country name: United Arab Emirates',
'Country name: Unknown'
]
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