write a function in JES that will distinguish type of file is chosen - jes

Question

"Write a function that will obtain a file name (using pickAFile), and then recognise if it is a picture or a sound file, or even some other file type. The file should then be interpreted as either a picture, if its type is jpg (then print an appropriate message, then exit) or a sound, if its type is wav (then print an appropriate message, then exit), and if it is neither a picture nor a sound file, then an error message must be printed. This error message should include the type of the file (or the lack of a type, e.g. a file name that might not have a period in it, e.g. ducksjpg). Remember that file types can be 2, 3, 4 or even more letters long! "
So this is what I have figured out so far and it works:
def sortoutfiles():
f= pickAFile()
print f
filename=f
if filename.endswith (".jpg"):
print "It's a picture"
if filename.endswith (".wav"):
print " It's a sound"
else:
print"Oops! Did not choose a picture or a sound file"
For some reason the program doesnt work when I try to use rfind-get error message-invalid syntax on line 5
def sortoutfiles():
f= pickAFile()
print f
filename=f
if p=filename.rfind('.jpg'):
print "It's a picture"
if filename=f.rfind(".wav"):
print " It's a sound"
else:
print"Oops! Did not choose a picture or a sound file"
here
Can someone tell me what I am doing wrong in writing the program using rfind?

Answer 1

Apco 1P00?
Use rfind to figure out the file extension
f = pickAFile()
p = f.rfind('.jpg') #finds if the file ends in .jpg
s = f.rfind('.wav') #finds if the file ends in .wav
length = len(f) #finds the length of the file name
Use this as a foundation and go from here using if statements.
Recall the last lab.
>>> testString = 'abc DEf ghi ihg uVW xyz'
>>> print testString.find('k')
-1 #"Not found" can't be 0, so result is -1