两个字符串打印相同但没有通过相等性测试？

str1 = "hello world"
str2 = "hello world\n"

# 使用strip()去除两端空白字符
if str1.strip() == str2.strip():
    print("Strings are equal after stripping")

str1 = "Hello World"
str2 = "hello world"

# 统一转换为小写后比较
if str1.lower() == str2.lower():
    print("Strings are equal after case normalization")

str1 = "café"
str2 = "cafe\u0301"  # 组合字符é

# 使用unicodedata.normalize进行规范化
import unicodedata
if unicodedata.normalize('NFC', str1) == unicodedata.normalize('NFC', str2):
    print("Strings are equal after normalization")

import unicodedata

def normalize_string(s):
    return unicodedata.normalize('NFC', s).strip().lower()

str1 = " Hello World! \n"
str2 = "hello world! "

normalized_str1 = normalize_string(str1)
normalized_str2 = normalize_string(str2)

if normalized_str1 == normalized_str2:
    print("Strings are equal after normalization and stripping")
else:
    print("Strings are not equal")