[Python]文件操作

#!/usr/local/bin/python3
#coding=UTF-8
'''''
Created on 2011-2-25
@author: Jacky
'''
import os
path = os.getcwd()+"\\HelloPython.py"
size = 1024
#不使用with语句手动关闭文件流
try:
    file = open(path,encoding="UTF-8")
    while True:
        #返回一个字典
        lines = file.readlines(size)
        if not lines:
            print("the lines is null")
            break
        for line in lines:
            print(line,end="")
except IOError as err:
    print(err)
finally:
    #locals()返回一个本地变量字典
    if "file" in locals():
        file.close()

#使用with语句自动关闭文件流
try:
    with open(path,encoding="UTF-8") as file:
        while True:
            #返回一个字典
            lines = file.readlines(size)
            if not lines:
                print("the lines is null");
                break
            for line in lines:
                print(line,end="")
        print()
except IOError as err:
    print(err)