正则表达式re.sub替换疑惑

Question

问题相关代码，请勿粘贴截图

import re

article = '''
<a href="http://www.test-test.com">http://www.snowwo-fasngoagn.com</a>
http://www.test-test.com
http://www.test-test.com/gsldno-sd/test'''

ss = re.sub(r'http://[a-z0-9/.-]*|https://[a-z0-9/.-]*', "", article, re.I)
print(ss)
print()
match = re.findall(r'http://[a-z0-9/.-]*|https://[a-z0-9/.-]*', article)
print(match)

运行结果及报错内容

https://ask.csdn.net/new
http://www.test-test.com/
http://www.test-test.com/gsldno-sd/test

['http://www.test-test.com', 'http://www.snowwo-fasngoagn.com', 'http://www.test-test.com', 'http://www.test-test.com/gsldno-sd/test']

我想要达到的结果

我想要用正则替换所有链接，re.findall可以匹配出来所有链接，但是re.sub只替换了部分

Answer 1

count参数默认是0，需要指定为4，或者使用subn，不需要指定count，默认全部替换

def sub(pattern, repl, string, count=0, flags=0):
    """Return the string obtained by replacing the leftmost
    non-overlapping occurrences of the pattern in string by the
    replacement repl.  repl can be either a string or a callable;
    if a string, backslash escapes in it are processed.  If it is
    a callable, it's passed the Match object and must return
    a replacement string to be used."""
    return _compile(pattern, flags).sub(repl, string, count)

def subn(pattern, repl, string, count=0, flags=0):
    """Return a 2-tuple containing (new_string, number).
    new_string is the string obtained by replacing the leftmost
    non-overlapping occurrences of the pattern in the source
    string by the replacement repl.  number is the number of
    substitutions that were made. repl can be either a string or a
    callable; if a string, backslash escapes in it are processed.
    If it is a callable, it's passed the Match object and must
    return a replacement string to be used."""
    return _compile(pattern, flags).subn(repl, string, count)