closure_2

closure_2.py

from functools import wraps                                                                                                                                                                                                                                                
import pickle                                                                                                                                                                                                                                                              
import sys                                                                                                                                                                                                                                                                 
                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                           
def foo(x):                                                                                                                                                                                                                                                                
    def bar():                                                                                                                                                                                                                                                             
        return x**2                                                                                                                                                                                                                                                        
    return bar                                                                                                                                                                                                                                                             
                                                                                                                                                                                                                                                                           
                                                                                                                                                                                                                                                                           
if __name__ == '__main__':                                                                                                                                                                                                                                                 
    try:                                                                                                                                                                                                                                                                   
        c = int(raw_input('input 1,2,3 to choose which test to run: '))                                                                                                                                                                                                    
    except ValueError:                                                                                                                                                                                                                                                     
        print 'not a number'                                                                                                                                                                                                                                               
                                                                                                                                                                                                                                                                           
    # this will work, because pickle needs a name                                                                                                                                                                                                                          
    if c == 1:                                                                                                                                                                                                                                                             
        print 'test1'                                                                                                                                                                                                                                                      
        bar = foo(2)                                                                                                                                                                                                                                                       
        with open('./delme', 'w') as ff:                                                                                                                                                                                                                                   
            pickle.dump(bar, ff)                                                                                                                                                                                                                                           
    elif c == 2:                                                                                                                                                                                                                                                           
        print 'test2'                                                                                                                                                                                                                                                      
        # this will not work, because pickle needs a name                                                                                                                                                                                                                  
        with open('./delme', 'w') as ff:                                                                                                                                                                                                                                   
            pickle.dump(foo(2), ff)                                                                                                                                                                                                                                        
    elif c == 3:                                                                                                                                                                                                                                                           
        print 'test3'                                                                                                                                                                                                                                                      
        # this will not work, because of the name conflict                                                                                                                                                                                                                 
        foo = foo(2)                                                                                                                                                                                                                                                       
        with open('./delme', 'w') as ff:                                                                                                                                                                                                                                   
            pickle.dump(foo, ff)                                                                                                                                                                                                                                           
    else:                                                                                                                                                                                                                                                                  
        print 'input out of range'