string-evaluation

I have a string in the form $string = 'London,Paris,Birmingham' and I want to search multiple columns for occurences of these values. For example WHERE events.name, events.cities, events.counties IN (".($string).") Can someone recommend me a simple and short way of doing something like this. Use the FIND_IN_SET function : WHERE ( FIND_IN_SET(events.name, mysql_real_escape_string($string)) > 0 OR FIND_IN_SET(events.cities, mysql_real_escape_string($string)) > 0 OR FIND_IN_SET(events.counties, mysql_real_escape_string($string)) > 0) 来源： https://stackoverflow.com/questions/3971622/mysql-is-array

For example, if I have a function called add like def add(x,y): return x+y and I want the ability to convert a string or an input to direct to that function like w=raw_input('Please input the function you want to use') or w='add' Is there any way to use w to refer to the function add? Since you are taking user input, the safest way is to define exactly what is valid input: dispatcher={'add':add} w='add' try: function=dispatcher[w] except KeyError: raise ValueError('invalid input') If you want to evaluate strings like 'add(3,4)' , you could use safe eval : eval('add(3,4)',{'__builtins__':None}