Capitalize the first letter in each string in a list

I have a list containing several strings. I want to capitalize the first letter of each string in the list. How can I do it using list methods? Or I have to use regex here?

我有一个包含几个字符串的列表。我想大写列表中每个字符串的第一个字母。我怎么能用list方法呢?或者我必须在这里使用正则表达式?

2 个解决方案

#1

Just call capitalize on each string. Note that it lowercases the rest of the letters

只需调用每个字符串。请注意,它会降低其余字母的大小

l = ['This', 'is', 'a', 'list']
print [x.capitalize() for x in l]
['This', 'Is', 'A', 'List']

If you need to preserve case on the other letters, do this instead

如果您需要在其他字母上保留大小写,请改为使用

l = ['This', 'is', 'a', 'list', 'BOMBAST']
print [x[0].upper() + x[1:] for x in l]
['This', 'Is', 'A', 'List', 'BOMBAST']

#2

x=['a', 'test','string']

print [a.title() for a in x]

['A', 'Test', 'String']

['A','测试','字符串']

Since regex is tagged too, you can use something like following

由于正则标记也被标记,您可以使用以下内容

>>> import re
>>> x=['a', 'test','string']
>>> def repl_func(m):
       return m.group(1) + m.group(2).upper()


>>> [re.sub("(^|\s)(\S)", repl_func, a) for a in x]
['A', 'Test', 'String']

#1