Some Python Tips

>>> eval("544.2222")   
544.2222  
>>> eval("544")   
544  

>>> 'hello'[::-1]  
'olleh'  

6UYFTG

>>>import string, random  
>>>''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(6))  
'NYU71H'

>>>'4'.zfill(3)  
'004'  
>>>"{0:03d}".format(4)  
'004'  

if not a:
    print("List is empty")

z = dict(list(x.items()) + list(y.items()))

z = x.copy()
z.update(y)