Python addition calculator

a=input("enter number 1: ")
b=input("enter number 2: ")

try:
    a=int(a)
    pass
except:
    print("Please enter a number!")
    exit()

try:
    b=int(b)
    pass
except:
    print("Please enter a number!")
    exit()

print(f"{a}+{b}={a+b}")
1+2=3