Python-based file processing

#r mode, default mode, file does not exist error#w mode, file exists overwrite, file does not exist then create#a mode, the file does not exist is created, the file exists does not overwrite, the write content is appended to the way.#file processing-readf = open ('a.txt','R', encoding='Utf-8')#print (' First-read: ', F.read ()) #读取文件所有内容,#f.seek (0) #可移动光标, the specified number in parentheses is the specified byte, you need to note a Chinese corresponding 3 bytes#f.seek (0) #可移动光标, the specified number in parentheses is the specified byte, you need to note a Chinese corresponding 3 bytes#print (' Seconde-read: ', F.read ()) #读取文件所有内容#print (f.read) #括号内可指定读取字符所在的位置. #print (F.readline (), end= ") #打印光标所在的当前行#print (F.readlines (), end= ") #文件内的所有字符, printed in a single line in the form of a list#file Processing-write#if the corresponding path does not have the file, a new file is created, if any, the contents of the file are emptied, and the new content is written#f = open (' B.txt ', ' W ', encoding= ' utf-8 ')#f.write (' 3333\n ') #只能以字符串的形式写数据#f.write (' 4444\n ')#print (' Data write complete! ')#f.writelines ([' 1111\n ', ' 2222\n ', ' 3333\n '])#print (' Data write complete! ')#print ()#f.close ()#file Handling--open#f = open (' A.txt ', ' a ', encoding= ' utf-8 ')#f.truncate (3) #截断#file Processing-Other#f = open (' B.txt ', ' W ', encoding= ' utf-8 ')#f.write (' ASFSADFGW ')#F.flush () #立即把内存的数据刷到硬盘去#f.close () #关闭文件#print (F.close ()) #判断文件是否关闭#print (f.readable ()) #判断文件是否可读#print (f.writable ()) #判断文件是否可写#f.seek (0)#print (F.tell ()) #输出当前光标位置#print (F.read ()) #打印全文#f.name,f.encoding#f = open (' A.txt ', ' W ', encoding= ' utf-8 ')#f.truncate (#括号内指定写入字符数)#file Processing--#f = open (' B.txt ', ' W ', encoding= ' utf-8 ')#f.write (' 44444\n ')#f.write (' 55555\n ')#f.close ()#Supplement#f = open (' a.txt ', ' RB ')#print (F.read ()) #以二进制的方式读取#print (F.read (). Decode (' Utf-8 ')) #将二进制转换为字符串, followed by an annotation code method#f=open (' a.txt ', ' WB ')#f.write (' Hello, Uncle '. Encode (' Utf-8 '))##F.A

Python-based file processing