Use Python please

please help ASAP

1) Write a function named "Countstr that operates over a list which includes a series of strings. The function takes a string and outputs the number of occurrences of that string in the given list. For example: Assume that dlist is a list that the user wants to search for the number of occurrences for the string "synth. dlist=["synthetic","polymer","synthesizer", "abaqus, python","synths", "macro"] The function that you prepare will search for "synth in each element of the list. The string synth has 3 occurrences in the list ("synthetic", "polymer, "synthesizer", "abaqus, "python","synths","macro"). Then it will report the number of occurrences as follows: The string synth has 3 occurrences in the list ["synthetic","polymer", "synthesizer", "abaqus","python","synths","macro"]