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save to disk

At the bottom of your program, two calls to the print() BIF
display your processed data on screen. You were to amend this
code to save the data to two disk files instead.

You were to call your disk files man_data.txt (for what the
man said) and other_data.txt (for what the other man said).
You were to make sure to both open and close your data files, as
well as protect your code against an IOError using try/except.
man = []
other = []

try:
data = open('sketch.txt')
for each_line in data:
try:
(role, line_spoken) = each_line.split(':', 1)
line_spoken = line_spoken.strip()
if role == 'Man': All of this code is
man.append(line_spoken) unchanged.
elif role == 'Other Man':
other.append(line_spoken)
except ValueError:
pass
data.close()
except IOError:
Did you remember to open
print('The datafile is missing!')
your files in WRITE mode?
try:
man_file = open(‘man_data.txt’, ‘w’) Open your two files, and assign
other_file = open(‘other_data.txt’, ‘w’) each to file objects.

file=man_file
print(man, ) Use the “print()” BIF to save the
file=other_file named lists to named disk files.
print(other, )

man_file.close() Don’t forget to close BOTH files.
other_file.close()
except IOError: Handle an I/O exception, should
print('File error.’) one occur.

112 Chapter 4