NameError: name ‘square’ is not defined

In python NameError: name ‘square’ is not defined we face this error message when we set up the turtle and want to turtle shape square but we type without string or quotation mark (“ ”) so python considers square as code, not a shape then the python interpreter shows this error message, If you want to fix this error you need to just add a square with string or quotation mark (“square”) then we are able to fix this error in python, For more clarification, see the below example.

Wrong Code

import turtle
import time
import random

# Set up the screen
wn = turtle.Screen()
wn.title("Snake Game")
wn.bgcolor("lightgreen")
wn.setup(width=600, height=600)

# Create the snake head
head = turtle.Turtle()
head.speed(0)
head.shape(square)
head.color("black")
head.penup()
head.goto(0, 0)
head.direction = "stop"

Error Massage

Traceback (most recent call last):
  File "/home/kali/python/webproject/Py_Games/tsnake/main.py", line 14, in <module>
    head.shape(square)
NameError: name 'square' is not defined

Wrong code line

head.shape(square)

Correct code line

head.shape("square")

• Improper action: square without string or quotation mark.
• Correct action: square with string or quotation mark (“square”).

Entire Correct Code line

import turtle
import time
import random

# Set up the screen
wn = turtle.Screen()
wn.title("Snake Game")
wn.bgcolor("lightgreen")
wn.setup(width=600, height=600)

# Create the snake head
head = turtle.Turtle()
head.speed(0)
head.shape("square")
head.color("black")
head.penup()
head.goto(0, 0)
head.direction = "stop"

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