Python program to convert Base 4 system to binary number

# function which converts decimal to binary
def decToBin(num):
    # Using default binary conversion functions
    binary = bin(num)
    # removing first two character as the
    # result is always in the form 0bXXXXXXX
    # by taking characters after index 2
    binary = binary[2:]
    return binary
# function to convert base4 to binary
def convert(num):
    # Taking a empty string
    resultstr = ""
    # converting number to string
    numstring = str(num)
    # Traversing string
    for i in numstring:
        # converting this character to integer
        i = int(i)
        # if i is 1 or 0 then add '0' to result
        # string
        if(i == 1 or i == 0):
            resultstr = resultstr+'0'
        # passing this integer to get converted to
        # binary
        binary = decToBin(i)
        # print(binary)
        # Concatenating this binary string to result
        # string
        resultstr = resultstr+binary
    # Converting resultstr to integer
    resultstr = int(resultstr)
    # Return result string
    return resultstr
# Driver code
Number = 11002233
# Passing this number to convert function
print(convert(Number))

def base4_to_binary(num):
    # Convert the number to base 10
    base10 = 0
    for i, digit in enumerate(num[::-1]):
        base10 += int(digit) * (4 ** i)
    
    # Convert the number to binary
    binary = bin(base10)[2:]
    return binary
num = "11002233"
binary = base4_to_binary(num)
print(f"The binary representation of {num} is {binary}")
# Output: The binary representation of 1032 is 10011010
num = "321321"
binary = base4_to_binary(num)
print(f"The binary representation of {num} is {binary}")
# Output: The binary representation of 30 is 11110