python文件和异常

#encoding:utf-8#读取文件'''关键字with在不再需要访问文件时将其关闭'''with open('pi_digits.txt') as file_object:    contents = file_object.read()   #read()把文件的全部内容读取成一个长长的字符串    print(contents.rstrip())    #rstrip()的作用是删除字符串末尾的空白#绝对文件路径读取文件print("\n")file_path = '/home/shihao/Desktop/python_work/pi_digits.txt'with open(file_path) as file_object:    contents = file_object.read()    print(contents.rstrip())#逐行读取文件内容print("\n")file_name = 'pi_digits.txt'with open(file_name) as file_object:    for line in file_object:        print(line.rstrip())#创建一个包含文件各行内容的列表print("\n")file_name = 'pi_digits.txt'with open(file_name) as file_object:    lines = file_object.readlines()  #readlines()从文件中读取每一行，并将其存放在一个列表中for line in lines:    print(line.rstrip())#写入文件file_name = 'programming.txt'with open(file_name, 'w') as file_object:    file_object.write("I love proggramming.\n")       #write()将一个字符串写入文件    file_object.write("I am shihao\n")#附加到文件file_name = 'programming.txt'with open(file_name, 'a') as file_object:    file_object.write("I love you!")

#encoding:utf-8#处理ZeroDivisionErrortry:    print(5/0)except ZeroDivisionError:    print("You can't divide by zero!")#处理FileNotFoundErrortry:    file_name = 'alice.txt'    with open(file_name) as file_object:        contents = file_object.read()except FileNotFoundError:    print("The file " + file_name + " not found")

#encoding:utf-8#使用json.dump()来存储数据列表import jsonnumbers = [2, 3, 5, 7, 11, 13]file_name = 'numbers.json'with open(file_name, 'w') as f_obj:    json.dump(numbers, f_obj)#使用json.load()读取列表到内存中with open(file_name) as f_obj:    numbers = json.load(f_obj)print(numbers)