StringProcessing_Example.py

# StringProcessing_Example.py
# Author:       Alex Paarfus <rapaarfus130@gmail.com>
# Date:         2018-08-05
#
# Requirements:
#       -Prompt the user for a string input
#           -Assume multiple words
#           -Assume seperated by non-alphas
#       -Display the number of characters in the input (all)
#       -Use a While Loop to:
#           -Search for <space> characters in the String
#           -Extract the words between non-alpha seperators
#           -Display the length of each word
#           -Display each word
#           -Count the number of words in the string
#               -Condition: if len(word) >= 0 then {count++}
#       -Print the number of words in the string
#       -Cannot use split()
#
# Notes:
#       -Has some error handling built in, but not much
#       -I've only been writing python for like two days
#       -This is to help a friend learn, not save the world
#       -Some of this code was adapted from something I saw on StackOverflow
#           -I know, I know.  Don't shoot me, though.

# Functions
# Check User input
def __checkInput(string):
    # If the user hasn't entered anything, yell at them.
    if not string:
        print('Error, you didn\'t enter any text.')
        return False
    # If the user entered only a number, yell at them.
    if string.isnumeric():
        print('Error, numeric digits aren\'t actually words.')
        return False
    return True

# Split, without split
def __sws(string):
    # Declare some local variables
    i = 0
    # tmp and splitList will be used to split up the sentence.
    tmp = ''
    splitList = []
    # While i is between 0 and the highest index of string:
    while i < len(string):
        # if the current character isn't a space, concat tmp with the new character
        if not string[i].isspace():\
            tmp += string[i]
        # else, if the length of tmp is greater than 0, add the new word to splitList
        else:
            if len(tmp) > 0:
                splitList.append(tmp)
                # and, of course, reset tmp to its' init value
                tmp = ''
        # incrememnt i (index) by 1
        i += 1
        # code to handle the last word
        # if i is the length of the string, or more && if tmp contains data:
        if i >= len(string):
            if tmp:
                # append tmp to the list
                splitList.append(tmp)
            # Break out of the while loop
            break
    # Final check -- if the splitList array contains any data, return that.
    if splitList:
        return splitList
    # else, return None
    return None

# Quick preface to the application:
print('owo -- Enter a sentence and I\'ll show you:\n' + \
    '\t-The Total number of characters\n' + \
    '\t-The Total number of words\n' + \
    '\t-Each word\n' + \
    '\t-The length of each word\n\n')

# Var Definitions
# Prompt the user for input
strInput = input('Ener a sentence: ')

# If the user entered a real string of one or more words...
if __checkInput(strInput):
    # Split the string into words only, without split()
    wordList = __sws(strInput)
    # If wordList contains *anything*, print out stats of input
    if wordList:
        # Display the total number of characters and words in the input
        print('Total number of characters: ' + str(len(strInput)))
        print('Total number of words:      ' + str(len(wordList)))
        # Display each word and its' respective length
        for word in wordList:
            print('Word:    ' + word)
            print('Length:  ' + str(len(word)))
    # If wordList is empty, or unassigned; return this generic error.
    else:
        print('Error, something went wrong.')