Python Programming for Raspberry Pi, Sams Teach Yourself in 24 Hours

4. Type all the information from script1704.py shown below. Take your time and
   avoid any typographical errors:

Click here to view code image

# script1704 - Open a File

# Written by

#

#####################################################

#

################## Functions ########################

#

def get_file_name (): #Get file name

print ()

#

try:

file_name=input("Please enter file to open: ")

print ()

return file_name

#

except KeyboardInterrupt:

print ()

print ("Script terminating....")

print ()

exit ()

#

except:

print ()

print ("An error has occurred.")

print ("Script terminating...")

print ()

exit ()

#

#

def open_it (file_name): #Open file name

my_file=open(file_name,'r')

print ("File", file_name, "opened successfully!")

my_file.close()

#

############## Mainline #############################

#

def main ():

file_name = get_file_name ()

open_it (file_name)

#

############ Call the Main Function ###################

#

main()

Notice that the only try except statement block is for entering information into

the script in the get_file_name function.

5. Save the editor contents and exit the editor.


6. Before you test the script, you need to create a little file for the script to open, so at
   the command-line prompt, type echo "I love my Raspberry Pi" >>
   testfile and press Enter.


7. Test your script by typing python3 py3prog/script1704.py and pressing