如何在regex python中限制空格？

import re

pattern = r"\s+"  # 匹配一个或多个空白字符
text = "Hello   World"

result = re.sub(pattern, "", text)
print(result)  # 输出：HelloWorld

import re

pattern = r" "  # 匹配单个空格字符
text = "Hello   World"

result = re.sub(pattern, "", text)
print(result)  # 输出：HelloWorld

import re

pattern = r" {2,3}"  # 匹配2到3个连续的空格字符
text = "Hello     World"

result = re.sub(pattern, " ", text)
print(result)  # 输出：Hello World