如何在 Python 中将字符串的第一个字母大写，而忽略 HTML 标签？

Question

I would like to capitalize the first letter of a string, ignoring HTML tags. For instance:

<a href="google.com">hello world</a>

should become:

<a href="google.com">Hello world</a>

I wrote the following, which works, but it seems inefficient, since every character of the string is being copied to the output. Is there a better way to do it?

@register.filter
def capinit(value):
  gotOne = False
  inTag = False
  outValue = ''
  for c in value:
    cc = c
    if c == '<':
      inTag = True
    if c == '>':
      inTag = False
    if not inTag:
      if c.isalpha() or c.isdigit():
        if not gotOne:
          cc = c.upper()
        gotOne = True
    outValue = outValue + cc
  return outValue

Note that this ignores initial punctuation. It will capitalize the first letter it finds, unless it finds a number first in which case it doesn't capitalize anything.

Answer 1

I tried to do what you wanted:

html = '<a href="google.com">hello world</a>'

afterletter = None
dontcapital = 0
afterhtml = ""
for character in html:
    if character == "/" and afterletter == "<":
        afterhtml += character
        dontcapital = 1
    elif afterletter == ">":
        if dontcapital == 0:
            afterhtml += character.upper()
        else:
            afterhtml += character
            dontcapital = 0
    else:
        afterhtml += character
    afterletter = character

print(afterhtml)

#afterhtml is the output!

this should work from all the tests i did.
if anyone wants to work on it you can.