Reading and Writing Files

Reading from a file

In PERL, files are read as -

open(IN,”filename”);
$=<IN>;
while(<IN>)
{
 print $,”\n”;
}
close(IN);

Above command first reads one line in the statement ‘$_=<IN>’. Then it continually reads sentences and prints
on the screen.

The equivalent command in Python is -

f = open(‘filename’, ‘r’)
line = f.readline()

for line in f:
    print line
f.close()

print line

Reading the entire file in an array

open(IN,”filename”);
@array=<IN>;

f = open(‘filename’, ‘r’)
lines = f.readlines()

Writing a string into a file

PERL

open(OUT,”>myfile”);
print OUT “My name is john\n”;
close(OUT);

Python

f = open(‘myfile’, ‘w’)

f.write(“hi, my name is john\n”)

File read/write symbols in PERL and Python