String concatenation attempt causing unexpected error

Question

I'm new to python and overflow so bear with me please.
import time
import datetime
    
now =  datetime.datetime.now()
   
if str(now.hour<12):
    print(str(now.hour -  12 + ":"))

error: unsupported operand type(s) for +: 'NoneType' and 'str'

razdi · Answer

I think the bigger problem is that you are casting to string in your if condition. Since a non empty string will be truthy, your condition will always result in true. The code should be:
import time
import datetime
    
now =  datetime.datetime.now()
   
if now.hour < 12:
    print(str(now.hour -  12) + ":"))

Joe Ferndz · Answer

You have to modify the code as follows:
import time
import datetime

now =  datetime.datetime.now()

if str(now.hour<12):
    print(str(now.hour -  12) + ":") #moved parenthesis inside

joe · Answer

Try
print(str(now.hour -  12) + ":")

Daniel Walker · Answer

You've got your parenthesis in the wrong place.  You want
str(now.hour-12)+":"

String concatenation attempt causing unexpected error

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