How we can solve the nameerror: name plot_cases_simple is not defined

The reason you’re getting the NameError: name ‘plot_cases_simple’ is not defined error is because you’re trying to use a variable, function, or some library that doesn’t exist in your python code. In Python, variables must be defined before they can be used, and this rule also applies to functions and libraries. So, in order to fix this error, you need to define the variable plot_cases_simple. Most Python developers have, at some point, encountered the error message NameError: name plot_cases_simple is not defined. In this article, we’ll show you how to fix this error.

First, we know the cause of nameerror: name plot_cases_simple is not defined error

The reason you’re getting the NameError: name ‘plot_cases_simple’ is not defined error is because you’re trying to use a variable that doesn’t exist. In Python, variables must be defined before they can be used. 

 

For eg.

name = 10

#Here it shows the NameError: name 'plot_cases_simple' is not defined .
print(plot_case_simple)

Output:

 

 

 

How we can fix the NameError: name ‘plot_cases_simple’ is not defined ?

So, in order to fix this error, you need to declare the variable plot_cases_simple in the python code before the print statement.

Fixed Code:

name = 10

#HERE WE DECLARE THE plot_case_simple variable and assign the value 20
plot_case_simple = 20 

print(plot_case_simple)

Output:

 

 

 

Sometimes it will pop up with the functions in python 

For eg.

name = 10 

# It shows NameError: name 'plot_case_simple' is not defined when we are trying to call function plot_case_simple()
print(plot_case_simple())

Output:

 

We can fix this function NameError.

name = 10 

#Here we declare the plot_case_simple() function and then call it in the print() statement
def plot_case_simple():
    return 20

print(plot_case_simple())

Output:

 

 

And sometimes it will pop up with the libraries in python.

pattern = '^b...f$'
string = 'bbysf'

#Here we will be getting the NameError: name 're' is not defined because we didn't import the re package in our program
find = re.match(pattern, string)

if find:
  print("Sequence found.")
else:
  print("Sequence not found.")	

Output:

 

We can fix this library NameError in python by importing the library using ‘import re’ line on the top of the program.

import re

pattern = '^b...f$'
string = 'bbysf'

#Here we will use re(regular expression) class object of package re for calling the match function.
find = re.match(pattern, string)

if find:
  print("Sequence found.")
else:
  print("Sequence not found.")	

Output:

 

I hope you have a clear vision now about the NameError: name plot_case_simple not defined.

 

Please also read our Python tutorials.