try:
 #打开 gb2312 文件
 f = open("./dir/txt-ansi.txt")
 print("文件打开成功")
 content = f.readlines()
 print(content)
 command = []
 for str in content:
 str = str.strip() #删除头尾空白
 if(len(str)): #只提取非空字符串
 command.append(str)
 content = None
 print(command)

 #逐行处理
 while True:
 line = f.readline()
 if not line: break
 line = line.strip()
 if(len(line)):
 command.append(line)
 print(command)

 #文件本身就是可迭代的
 for line in f:
 line = line.strip()
 if(len(line)):
 command.append(line)
 print(command)

 print(int('FF', 16))
except FileNotFoundError as e:
 print("文件不存在")
except Exception as e:
 print("发生未知错误", e)
else:
 print("文件打开成功")
finally:
 f.close()

#打开 utf-8 文件
with open("./dir/txt-utf8.txt", encoding="utf-8") as f8:
 content = f8.readlines()
 print(content)