这将使它们大写,但仅限于没有嵌套列表。
t = ['this','that', ['other']]
def capitalize_nested(t):
res = []
for s in t:
res.append(s.capitalize())
return res
print capitalize_nested(t)
我无法弄清楚如何打印出一个嵌套列表,其中所有字符串都以大写字母开头。我一定错过了一些明显的东西,这让我感到难过。
答案 0 :(得分:11)
使用递归解决方案(使用列表推导也有助于使其更紧凑):
def capitalize_nested(t):
if isinstance(t, list):
return [capitalize_nested(s) for s in t]
else:
return t.capitalize()
例如:
print capitalize_nested(['this', 'that', ['other']])
# ['This', 'That', ['Other']]
答案 1 :(得分:3)
def cap(L):
for i,elem in enumerate(L):
if isinstance(elem, str):
L[i] = elem.capitalize()
elif isinstance(elem, list):
cap(L[i])
答案 2 :(得分:2)
只需检查s
是否为列表,然后以递归方式调用capitalize_nested
函数:
t = ['this','that', ['other']]
def capitalize_nested(t):
res = []
for s in t:
if type(s) == list:
res.append(capitalize_nested(s))
else:
res.append(s.capitalize())
return res
print capitalize_nested(t)
答案 3 :(得分:1)
递归解决方案是第一个解决方案和最美观的解决方案,但并不总是最佳解决方案,请检查此迭代解决方案:
def capitalize(t):
lists = [t]
while lists:
l = lists.pop()
for i, item in enumerate(l):
if isinstance(item, list):
lists.append(item)
else:
l[i] = item.capitalize()
答案 4 :(得分:1)
这是一个支持任意深层嵌套列表的版本:
from collections import MutableSequence
def capitalize_inplace(nested_list):
stack = [nested_list]
while stack:
lst = stack.pop()
for i, item in enumerate(lst):
if isinstance(item, MutableSequence):
stack.append(item)
else:
lst[i] = item.capitalize()
L = ['this', 'that', ['other'], ['may',['be', ['nested'], 'further']]]
capitalize_inplace(L)
print(L)
# -> ['This', 'That', ['Other'], ['May', ['Be', ['Nested'], 'Further']]]