python-2.x

Instead of using write() , what are the other way to write to a text file in Python 2 and 3? file = open('filename.txt', 'w') file.write('some text') You can use the print_function future import to get the print() behaviour from python3 in python2: from __future__ import print_function with open('filename', 'w') as f: print('some text', file=f) If you do not want that function to append a linebreak at the end, add the end='' keyword argument to the print() call. However, consider using f.write('some text') as this is much clearer and does not require a __future__ import. f = open('filename.txt

I'm experimenting with bytes vs bytearray in Python 2.6. I don't understand the reason for some differences. A bytes iterator returns strings: for i in bytes(b"hi"): print(type(i)) Gives: <type 'str'> <type 'str'> But a bytearray iterator returns int s: for i in bytearray(b"hi"): print(type(i)) Gives: <type 'int'> <type 'int'> Why the difference? I'd like to write code that will translate well into Python 3. So, is the situation the same in Python 3? mjv In Python 2.6 bytes is merely an alias for str . This "pseudo type" was introduced to [partially] prepare programs [and programmers!] to be

I have two questions converning metaclasses and multiple inheritance. The first is: Why do I get a TypeError for the class Derived but not for Derived2 ? class Metaclass(type): pass class Klass(object): __metaclass__ = Metaclass #class Derived(object, Klass): pass # if I uncomment this, I get a TypeError class OtherClass(object): pass class Derived2(OtherClass, Klass): pass # I do not get a TypeError for this The exact error message is: TypeError: Error when calling the metaclass bases Cannot create a consistent method resolution order (MRO) for bases object, Klass The second question is: Why