Creating a random sentence generator is one of the most rewarding and useful projects to undertake as a beginner and will encourage creativity, test a piece of software or just play with the language in a fun and structured way. Easy enough for a beginner and challenging enough for the advanced player. The concept, logic, and steps to building one from scratch.
What Is a Random Sentence Generator?
A random sentence generator is a program that generates grammatically correct (or, sometimes, absurd) sentences from a set of words—usually nouns, verbs, adjectives and adverbs—arranged in a particular order. Depending on how you have it set up, the results may be poetic nonsense or surprisingly meaningful phrases.
These tools have practical applications, as well. They are used by writers to get over a writing block. These are used by developers to create ‘dummy’ Tiny Text Generator for UI testing. They are used in the classroom with teachers for engaging in grammar instruction. Simple generators are used by machine learning engineers to test NLP pipelines.
The importance of understanding the Core Logic
I am going to tell you a very best and easy idea of what is going on underneath before coding the first line of code. Each sentence is grammatically structured. The most basic one is:
Subject + Verb + Object
For instance: “The cat runs after the ball.
Add adjectives, adverbs and prepositional phrases:
Article + Adjective + Noun + Adverb + Verb + Article + Adjective + Noun
A dog slowly runs after a red ball (Lazydog: slow chase redball).
Your generator will keep lists of the words for each of the different grammatical roles and then randomly select one word from each list and insert it into the sentence pattern you want to use. That’s basically it — as many templates and how you fill in those lists, that’s the magic.
Setting Up Your Word Banks
Your word banks are the basis of the quality of your generator. Use four basic categories:
- Verbs: walk, bark, meow, growl, talk, sing, play, dance, move, jump, run, jump, wink, swing
- Adverbs: quickly, quickly, attentively, quietly, carelessly, triumphantly
- NOUN: person, creature, object, or thing that is frightening or unusual. There were you will used this as a noun, an adjective is a person, creature, object or thing that is frightening or unusual.
- Adverbs: slowly, eagerly, accidentally, with great enthusiasm, reluctantly, suspiciously
See that some entries are phrases, not words — well, it’s okay, and in fact it makes your writing sound more natural and funny. The more interesting your sentences will be the more extensive your word bank and the more varied.
There is a noun which is know as Proper nouns (places or people), time expressions (“at midnight,” “every Tuesday”) and conjunctions can also be used to link two clauses together. The more categories you create, the more elaborate and realistic your sentences will be.
Writing the Generator in Python
I am going to explain you about a random module in Python makes it a natural choice to write this project. Here’s a simple version to get you started:
import random
nouns = [“the cat”, “a wizard”, “the robot”, “an astronaut”]
verbs = [“chases”, “discovers”, “whispers to”, “accidentally drops”]
adjectives = [“ancient”, “bewildered”, “grumpy”, “luminous”]
objects = [“a banana”, “the moon”, “an old book”, “three confused pigeons”]
def generate_sentence():
subject = random.choice(nouns)
adjective = random.choice(adjectives)
verb = random.choice(verbs)
obj = random.choice(objects)
return f”{subject.capitalize()} {verb} {adjective} {obj}.”
for _ in range(5):
print(generate_sentence())
When you run this it will generate something similar to:
“The cat whispers to bewildered three confused pigeons.”
One of the fruit which is banana falls out of a wizard’s hat, emitting a flash of light.
I think so the audience is following the notice that it’s not always as perfect as one might expect, and that’s part of the fun. Once some grammatical finesheeting (articles agreeing, for instance) is done, the sentences become much smoother.
When you add Templates for Variety, you can choose from the options below:
A great improvement is the inclusion of several sentence templates and a random selection amongst them. For instance:
- Template 1: [Subject] [Verb] [Object].
- Template 2: [Subject] [Adverb] [Verb] [Adjective] [Object].
- Template 3: Every day, [Subject] [Verb] [Object] until [Object] [Verb] back.
You can pick one of these at random when you need to use them as functions or format strings, and the resulting variety of output is much greater than if you had to build up your word list.
Taking It Further
If you have the basic parts done you can go in many directions! You could embed a graphical interface (one of a web page with a “Generate” button, printing out a new sentence each time you click it). You could feed your generator from a Word API outside your own application, such as Datamuse or WordsAPI, to get thousands of actual words dynamically loaded. Maybe you could make a fantasy sentence generator, a sci-fi plot prompt generator, or perhaps a motivational quote generator!
More adventurously, you could use Markov chains to create sentences statistically similar to a large text you feed it with, such as Shakespeare’s plays, or tweets. This is a transition between simple random sampling and true language modelling.
This project is important because
The random sentence generator is an introduction to concepts that will carry over to larger, more complex applications. You work with lists and data structures, understand the role of randomness in programming, get used to modular programming and functions, and begin to examine the structure of language itself. This one is really very easy and simply just really amusing, you get a particular satisfaction seeing your program come up with something that makes no sense, but it sounds profound.
Keep it small, make it fun, and allow the sentences to surprise you. That is the purpose!
