Getting Started with Python Reading and Writing Files

1. Open the file and read all the contents

file_object = open('thefile.txt')
try:
  all_the_text = file_object.read( )
finally:
  file_object.close( )

2. Read Fixed bytes

file_object = open('abinfile', 'rb')
try:
while True:
chunk = file_object.read(100)
if not chunk:
break
do_something_with(chunk)
finally:
file_object .close( )

3. Read one line of the file

f = open("D:\test\BlueSoftSetup.log","r")

try:

while True:

line = f. Readline () l if line:

Print (line)

else:

break;

finally:

f.close ();

4. output = open('data', 'w')

Write binary file

output = open('data', 'wb')

Append write file
output = open('data', 'w+')

Write data
file_object = open('thefile.txt', 'w')

file_object.write(all_the_text)

file_object.close( )