>>> shepherd = "Mary" >>> age = 32 >>> stuff_in_string = "Shepherd {} is {} years old.".format(shepherd, age) >>> print(stuff_in_string) Shepherd Mary is 32 years old.
def insert (source_str, insert_str, pos): return source_str[:pos]+insert_str+source_str[pos:]
>>> line = 'Kong Panda' >>> index = line.find('Panda') >>> output_line = line[:index] + 'Fu ' + line[index:] >>> output_line 'Kong Fu Panda'