【python初识】文件存储与异常

文件存储与异常

1、打开关闭文件

import osif os.path.exists('sketch.txt'):  the_file = open('sketch.txt')  print(the_file.readline(),end=' '  the_file.close()else:  print('the data is missing')

2、split函数

for each_line in data:  if not each_line.find(':') == -1    (role,line_spoken) = each_line.split(':',1) #分成两部分

3、异常处理

try:  the_file = open('sketch.txt')  print(the_file.readline(),end=' 'except IOError:  print('the data is missing')finally:   the_file.close()try:  with open ('it.txt',"w") as data:  print("aag",file = data)except IOError as err:  print("File error:" + str(err) )

4、strip函数

(role,line_spoken) = each_line.split(':',1)line_spoken = line_spoken.srep() #从字符串去除不想要的字符

5、写入文件

out = open("data.out",'w')print("NOR iii",file = out)out.close()

6、保存文件

import pickle with open('mydata.pickle','wb') as msd  pickle.dump([1,2,'t'],msd)with open('mydata.pickle','rb') as mrd  mlist = pickle.load(mrd)print(mlist)