进度条：

#Author:Brillimport sys,timefor i in range(50):    sys.stdout.write("#")    sys.stdout.flush()    time.sleep(0.1)

文件修改：（未成功）

#Author:Brillf = open("yesterday2","r",encoding="utf-8")f_new = open("文件名","w",encoding="utf-8")for line in f :    if "要改的内容" in line:        line = line.replace("要改的内容","新的内容")    f_new.write(line)f.close()f_new.close()

 文件相关操作：

#Author:Brill#data  = open("yesterday",encoding="utf-8").read()f  = open("yesterday2",'a',encoding="utf-8")f.write("When I was young I listen to the radio.\n")data = f.read()print("-----read----",data)f.close()f  = open("yesterday2",'r',encoding="utf-8")for index,line in enumerate(f.readlines()):    print(line.strip())    if index == 9:        print("-------------I am middle-------------")        continue    print(line.strip())#for i in range(5): #   print(f.readline())f  = open("yesterday2",'r',encoding="utf-8")count = 0for line in f :    if count == 9:        print("------------------I am you----------------")        count +=1        continue    print(line)    count +=1f  = open("yesterday2",'r',encoding="utf-8")print(f.tell())print(f.readline())print(f.readline())print(f.readline())print(f.tell())f.seek(10)print(f.readline())print(f.encoding)print(f.fileno())print(f.flush())print(f.buffer)print(dir(f))f.close()f = open("yesterday2","a",encoding="utf-8")f.seek(10)f.truncate(10)f = open("yesterday2","r+",encoding="utf-8")print(f.readline())print(f.readline())print(f.readline())f.write("------------Hello--------------------")print(f)