Python:用读入文件替换字符错误

def replace_error(file_path, old_char, new_char):
    try:
        with open(file_path, 'r') as file:
            content = file.read()
            replaced_content = content.replace(old_char, new_char)
        
        with open(file_path, 'w') as file:
            file.write(replaced_content)
        
        print("替换成功！")
    except FileNotFoundError:
        print("文件不存在！")
    except Exception as e:
        print("替换失败：", str(e))

# 替换文件中的字符错误
file_path = "example.txt"
old_char = "错误字符"
new_char = "正确字符"
replace_error(file_path, old_char, new_char)