常见的编解码问题

filename_path = "./p.txt"
try:
    f = open(filename_path,"w",encoding="utf-8") #encoding="utf-8"
    print(f.write("作者，啊锋"))
except:
    print("%s文件缺失"%(filename_path))         正确的

filename_path = "./p.txt"
try:
    f = open(filename_path,"w") 
    print(f.write("作者，啊锋"))
except:
    print("%s文件缺失"%(filename_path))    错误的