ex16.read-and-write-file.py

# Learn Python the Hard Way
# Exercise 16 - Read and Write File

from sys import argv

script, filename = argv

print "We're going to erase %r" % filename
print "If you don't want that, hit CTRL-C (^C)."
print "If you do want that, hit RETURN."

raw_input("?")

print "Opening the file..."
target = open(filename, 'w')

print "Truncating the file. Goodbye!"
target.truncate()

print "Now I'm going to ask you for three lines."

line1 = raw_input("line 1:")
line2 = raw_input("line 2:")
line3 = raw_input("line 3:")

print "I'm going to write these to the file."

# target.write(line1)
# target.write("\n")
# target.write(line2)
# target.write("\n")
# target.write(line3)
# target.write("\n")

# Using formatted string to reduce repetition
target.write("%s\n%s\n%s\n" % (line1, line2, line3))

print "And finally, we close it."
target.close()

print "Cancel last mike, I want to read the new content instead."
target = open(filename)
print target.read()

print "Ok, now we are really done."
target.close()