The Problem

I am defining a template literal in JavaScript that is used to store python code.

Here is the MRE:

const execTemplate = python_code = """${formattedCode}
"""

where formattedCode can be any python code, for example:

def fibonacci(n):
    fib_sequence = [0, 1]
    while len(fib_sequence) < n:
        fib_sequence.append(fib_sequence[-1] + fib_sequence[-2])
    return fib_sequence

first_20_fib = fibonacci(20)
print(first_20_fib)

Here’s what would happen if the code above was executed:

def fibonacci(n):
fib_sequence = [0, 1]
while len(fib_sequence) < n:
fib_sequence.append(fib_sequence[-1] + fib_sequence[-2])
return fib_sequence

# Generate the first 20 Fibonacci numbers
first_20_fib = fibonacci(20)
print(first_20_fib)

Research

I have tried both inserting the variable directly as shown, but I have also tried the replace() method, which does not solve the problem: const executableString = execTemplate.replace("%CODE%", formattedCode.trim()); where %CODE% is a placeholder in execTemplate.

Why is this?