python file handling

1. Text-files
2. Binary-files
3. CSV-files

x to create a new file

Read only mode

r

file should exist before existing

Write only mode

w

It will overwrite any previous data

Append mode

a

Add content at the end of the file

keyword: with

with open('filename.txt', 'mode') as fileobject:
    ## context manager will take care of closing the file

Methods

fileob=open("filename.txt", 'r')
close(fileob)
 
fileob.read()
fileob.readline()
fileob.readlines()
 
fileob.write("hello")
fileob.writeline("one line of data")
fileob.writeline(list)
 
fileob.tell()
Return the current stream position.
 
fileob.seek(offset,whence)
 
  0: start of the stream (the default); offset should be zero or positive
  1: current stream position; offset may be negative
  2: end of the stream; offset is usually negative