import os
from tempfile import *
from PIL import Image

def get_file_stream():
    # magic
    fn = raw_input("Input Filename Here: ")
    f = open(fn,'rb')
    rv = f.read()
    f.close()
    return rv

# workaround starts here
tf = mkstemp()
os.close(tf[0])

f = open(tf[1],'r+b')
f.seek(0)
f.write(get_file_stream())
f.close()

i = Image.open(tf[1])
print i.getcolors()

# do image stuff here
i.crop((0,0,1,1))
i.save('NUL','JPEG')
# image do stuff ends here

os.unlink(tf[1])
# workaround ends here