Date3

进度条：

#Author:Brill
import sys,time

for i in range(50):
    sys.stdout.write("#")
    sys.stdout.flush()
    time.sleep(0.1)

文件修改：（未成功）

#Author:Brill

f = 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.
")
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 = 0
for line in f :
    if count == 9:
        print("------------------I am you----------------")
        count +=1
        continue
    print(line)
    count +=1

f  = 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)