calc.py

#! coding='utf-8'

def add(a, b):
    return a+b

def sub(a, b):
    return a-b

def mul(a, b):
    return a*b

def div(a, b):
    return a/b

def mod(a, b):
    return a%b

def n_root(n, r):
    return r**(1/n)

def sin(a):
    return sin(a)

def cos(a):
    return cos(a)

def tan(a):
    return tan(a)

options = {1:add, 2:sub, 3:mul, 4:div, 5:mod, 6:n_root, 7:sin, 8:cos, 9:tan}

print('Please choose your method: \n')
print('(1) Addition (2) Subtraction (3) Multiplication (4) Divison')
print('(5) Modulo (6) n-root (7) Sinus (8) Cosine (9) Tangent')
choosen = int(input(': '))
if choosen in options:
    print('\nPlease enter the 2 numbers you want to operate with:')
    print('Please use . (dot) not , (comma) for float.\n')
    if choosen==6:
        print('HINT: For n-root, first number is <n> and second number is <base>')
        print('Example 1: first number: 2, second number: 10 is squareroot of 10')
        print('Example 2: first number: 3, second number: 10 is third root of 10 \n')
    first_number=float(input('First number: '))
    second_number=float(input('Second number: '))
    solution=options[choosen](first_number, second_number)
    print(solution)
else:
    print('Please choose a operation from 1 to 9')