Return statement using ternary operator
Your C code doesn't contain two return statements. Neither should your python code... The translation of your ternary expression is n if n<m else m, so just use that expression when you return the value:
def minn(n,m): return n if n<m else m
def minn(n,m): return n if n<m else mThe expr1 if expr2 else expr3 expression is an expression, not a statement. return is a statement (See this question)
Because expressions cannot contain statements, your code fails.