# Author:  James Tam
# Version: November, 2013

# Learning concepts:
# Using the len() function in conjunction with strings
# Using string slicing for a practical example (determining file # type as specified by file name suffix)

MAX_FILE_LENGTH = 256
SUFFIX_LENGTH = 3

filename = input("Enter new file name (max 256 characters): ")
if (len(filename) > MAX_FILE_LENGTH):
    print("File name exceeded the max size of %d characters, you bad" %(MAX_FILE_LENGTH))
else:
    # Find file type, last three characters in string e.g., resume.txt
    endSuffix = len(filename)
    startSuffix = endSuffix - SUFFIX_LENGTH
    suffix = filename[startSuffix:endSuffix]
    if (suffix == "txt"):
        print("Text file")
        print("%d:%d %s" %(startSuffix,endSuffix,suffix))