[Python] Getting an EOF Error when I run a file that worked fine previously

This is a completed personal project of a simple calculator, and it was working fine the last time I used it in VS Code. But I revisited the code today and this EOF error popped up in the terminal.

How do I solve this?

Here's the code

def solver():
while True:
print("\nSelect Operation")
print("1.Arithmetic Operations")
print("2.Linear Equation")
print("3.Quadratic Equation", "\n")

choice = input("Please enter choice(1/2/3): ")
if choice == "1":
try:
arg1 = float(input("Add 1st number: "))
arg2 = float(input("Add 2nd number: "))
except ValueError:
print("Invalid input. Please enter a number")
continue

allowed_functions = set(["+", "-", "/", "*"])

function = input("Please choose operation from [+, -, *, /]: ")

if function not in allowed_functions:
print("Function must contain mathetmatical operation values only")
continue

# define mathematical operations
if function == "+":
output = arg1 + arg2
elif function == "-":
output = arg1 - arg2
elif function == "*":
output = arg1 * arg2
elif function == "/":
if arg2 == 0:
print("Division by 0 not possible")
continue
output = arg1 / arg2

str_arg1 = str(arg1)
str_arg2 = str(arg2)
str_output = str(output)

width = max(len(str_arg1), len(str_arg2), len(str_output)) + 2
top = str_arg1.rjust(width)
bottom = function + str_arg2.rjust(width - 1)
lines = "-" * width
result = str_output.rjust(width)

problems = f"{top}\n{bottom}\n{lines}\n{result}"
print(problems)

quit_program = input("Quit program? (Y/N): ")

if quit_program.lower() == "y":
break

# linear eq
if choice == "2":
print(f'\n{"Linear Equation Form:":^24}\n{"ax + b = 0":^24}\n')

# coefficent inputs
a = int(input("Please enter a: "))
if a == 0:
print("Highest degree coefficent cannot be 0")
continue

b = int(input("Please enter b: "))

# display in equation form
lin_eq = f"{a:+}x {b:+} = 0"
final_lin = re.sub(r"(?<!\d)1(?=x)", "", lin_eq.strip("+"))
aligned_final_lin = f"{final_lin:^24}"
result = "\n" + aligned_final_lin
print(result)

# solving for x
x = -b / a
ans_str = f'{f"x = {x}":^24}'
solved_lin = f'\n{"Solution":^24}\n{ans_str}\n'
print(solved_lin)

quit_program = input("Quit program? (Y/N): ")

if quit_program.lower() == "y":
break

# quadratic eq
if choice == "3":
print(f'\n{"Quadratic Equation Form":^24}\n{"ax^2 + bx + c = 0":^24}\n')

a = int(input("Please enter a: "))
if a == 0 or a == "0":
print("Highest degree coefficent cannot be 0")
continue

b = int(input("Please enter b: "))

c = int(input("Please enter c: "))

# display eq
if b == 0:
quadr_eq = f"{a:+}x^2 {c:+} = 0"
final_quadr = re.sub(r"(?<!\d)1(?=x)", "", quadr_eq.strip("+"))
aligned_final_quadr = f"{final_quadr:^24}"
result = "\n" + final_quadr

else:
quadr_eq = f"{a:+}x^2 {b:+}x {c:+} = 0"
final_quadr = re.sub(r"(?<!\d)1(?=x)", "", quadr_eq.strip("+"))
aligned_final_quadr = f"{final_quadr:^24}"
result = "\n" + aligned_final_quadr

print(result)

delta = b**2 - 4 * a * c

# solve formula

# defining discriminants
ans_string = ""

if delta > 0:
x1 = (-b + math.sqrt(delta)) / (2 * a)
x2 = (-b - math.sqrt(delta)) / (2 * a)
ans = [x1, x2]
ans_format = f"\n{str(ans):^24}"
ans_string += (
f'{"Two real and distinct solutions: " f"{ans_format}":^24}'
)

elif delta == 0:
x1 = (-b + math.sqrt(delta)) / (2 * a)
x2 = (-b - math.sqrt(delta)) / (2 * a)
ans = [x1]
ans_format = f"\n{str(ans):^24}"
ans_string += f'{"One real solution: " f"{ans_format}":^24}'

elif delta:
ans_string += f'{"No real solution":^24}'

solved_quadr = f'\n{"Solution":^24}\n{ans_string}\n'
print(solved_quadr)

quit_program = input("Quit program? (Y/N): ")

if quit_program.lower() == "y":
break


def main():
solver()


if __name__ == "__main__":
main()


Here's the error:

Traceback (most recent call last):

File "c:\Users\Downloads\python\Simple Calc Project\solver.py", line 158, in <module>
main()

File "c:\Users\Downloads\python\Simple Calc Project\solver.py", line 154, in main
solver()

File "c:\Users\Downloads\python\Simple Calc Project\solver.py", line 12, in solver
choice = input("Please enter choice(1/2/3): ")
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

EOFError: EOF when reading a line

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