Python_ Text Manipulation

1 #write content to a text file2s='Hello world\n text file Read method \ n Text file write method \ n'3F=open ('Sample1.txt','A +')#Open File4F.write (s)#Write file Contents5F.close ()#Close File6 7With open ('Sample1.txt','A +') as F:8 F.write (s)9 Ten #the context management statement with also supports the following usage: OneWith open ('Test.txt','R') as Src,open ('Test_new.txt','W') as DST: A Dst.write (Src.read ()) -  -  forLineinchOpen'Test.txt'): the     Print(line) -  - #Read text file contents -fp = open ('Test.txt') + #content within the Test.txt g4a6d4g6a5gaojdfoiayufiajgldjuaidfjldakjgalgm LADJGLFA98EPOFAJIIDFJLADJFAJF - Print(Fp.read (4))#reads the first 4 characters from the current position + #G4A6 A Print(Fp.read (18))#English subtitles are treated like Chinese characters at #D4g6a5gaojdfoiayuf - #How to read a text file - Print(Fp.read ())#reads everything that follows from the current location - #IAJGLDJUAIDFJLDAKJGALGM LADJGLFA98EPOFAJIIDFJLADJFAJF - #How to write a text file -Fp.close ()#Close File Object

1 " "2 reads and displays all lines of a text file, and the file object is an iterative3 " "4With open ('Sample.txt') as FP:5     Print(Type (FP))6      whileTrue:7Line=Fp.readline ()8         if  notLine :9              BreakTen         Print(line) One  A  -With open ('Sample.txt') as FP: -      forLineinchFp:#a file object can be iterated the         Print(line) -  -With open ('Sample.txt') as FP: -lines = Fp.readlines ()#Do not recommend this when working with large files +     Print("'. Join (lines)) -  + " " A moves the file pointer. Assume that the contents of the file sampple.txt are originally ' Hello world\n text file Read method \ n Text file Write method ' at " " -FP =open ('Sample.txt','r+') - Print(Fp.tell ())#returns the current position of the file pointer - #0 - Print(Fp.read (20))#Read 20 characters - #Tiger 2017 years old: in #belong to the tiger - #201 toFp.seek (13)#re-ding W.Q. file pointer position + Print(Fp.read (5)) - #years old: theFp.seek (100) *Fp.write ('Test Move') $Fp.flush ()#Write buffer contents to disk FilePanax Notoginseng fp.seek (0) - Print(Fp.read ()) theFp.close ()

Note: The text file that appears is created by itself

Python_ Text Manipulation