# b_test_Py2_to_py3.py

# -*- coding: utf-8 -*-

# print
print 123
print 123,

# dictionary
mydict = {"name": "John Doe", "age": 30}
for key in mydict.keys():
    print key

for value in mydict.values():
    print value

for key, value in mydict.iteritems():
    print key, value

# raw_input => input
name = raw_input("What is your name: ")
print name

# StringIO
import StringIO

stream = StringIO.StringIO("A string input.")
print stream.read()

# xrange => range
for i in xrange(1, 5):
    print i,

# map, filter, reduce, zip operations
my_list = ["1", "22", "333", "4444"]
my_list_mapped = map(int, my_list)
my_list_filtered = filter(lambda x: x < 10 or x > 100, my_list_mapped)
my_list_reduced = reduce(lambda x, y: x + y, my_list_filtered)
my_list_zip = zip(my_list, xrange(4))

# Class
class MyClass:
    def __init__(self, name):
        self.name = name

    def __str__(self):
        return self.name

# Iterator
class MyIterator:
    def __init__(self, iterable):
        self._iter = iter(iterable)

    def next(self):
        return self._iter.next()

    def __iter__(self):
        return self

my_iterator = MyIterator([1, 2, 4, 5])
my_iterator.next()
print my_iterator

# exception
try:
    b = 1 / 2.0
    c = 1 / 0
except ZeroDivisionError, e:
    print str(e)

# Attention here. This can not be automatically done properly and
# will break your code.
# bytes and unicode
assert isinstance("a regular string", bytes)
assert isinstance(u"a unicode string", unicode)
assert isinstance("a regular string", basestring)

# string codec: encodeing and decoding
my_bytes1 = "\xc3\x85, \xc3\x84, and \xc3\x96"
my_unicode1 = my_bytes1.decode("utf-8")
assert isinstance(my_bytes1, bytes)
assert isinstance(my_unicode1, unicode)

my_unicode2 = u"Å, Ä, and Ö"
my_bytes2 = my_unicode2.encode("utf-8")
assert isinstance(my_unicode2, unicode)
assert isinstance(my_bytes2, bytes)