Python 文件读取与存储

file1=open('pima-indians-diabetes.txt','r')

file2=open('out.txt','w+')

#data=file1.read()

i=0

while True:

line=file1.readline()

tt='"'+line[:-1:1]+'"'+','

if i<3:

print(tt)

i+=1

file2.write(tt+'n')

if not line:

break

file1.close()

file2.close()

#read() 将文本文件所有行读到一个字符串中

#readline() 一行一行的读

#readlines() 将文本文件中所有行读到一个List中，文本文件每一行是list的一个元素

file3=open('out1.txt','w')

for i in open('pima-indians-diabetes.txt','r'): # 文件迭代器

file3.write(i)

file3.close()

print("----------------------------")

t=0

file4=open('out2.txt','w')

with open('pima-indians-diabetes.txt','r') as f:

for i in f:

file4.write('"'+i[:-1:1]+'"'+'n')

if t<4:

print(i)

t+=1

file4.close()

print("----------------------------")

t=0

file4=open('out3.txt','w')

with open('pima-indians-diabetes.txt','rb') as f:

for i in f:

file4.write(i.decode())

if t<4:

print(i)

t+=1

file4.close()

f=open('007.jpg','rb') # 二进制读取图片

print(f.read())

import os

print(os.name)

print(os.path.abspath('.'))

paths=os.path.abspath('.')+'hello'

#os.mkdir(paths) # 创建文件夹

#os.rmdir(paths) # 删除文件夹

print(dir(os.path.abspath('.')))

tt=list(x for x in os.listdir('.') if os.path.isdir(x)) #列出当前目录下的所有目录

print(tt)

# 列出.py文件

ttt=list(x for x in os.listdir('.') if os.path.isfile(x) and os.path.splitext(x)[1]=='.py')

print(ttt)

pp='E:/python/test/Class4.py'

tt=os.path.split(pp)

print(tt)

t1=os.path.splitext(pp)

print(t1)