i = 0; a = ['', '']
i, a[i] = 1, 10
print a  # -> ['', 10] - cf. https://news.ycombinator.com/item?id=8091943 - Original blog post from http://jw2013.github.io

issubclass(list, object) # True
issubclass(object, collections.Hashable) # True
issubclass(list, collections.Hashable) # False - There are 1449 such triplets (4.3% of all eligible triplets) in Python 2.7.3 std lib

# Python 2 only, found it myself
f = 100 * -0.016462635 / -0.5487545  # observed on the field, in a real-world situation
print '            f:', f              # 3.0
print '       int(f):', int(f)         # 2
print '     floor(f):', floor(f)       # 2.0

# Name mangling:
class Yo(object):
    def __init__(self):
        self.__bitch = True
Yo().__bitch  # AttributeError: 'Yo' object has no attribute '__bitch'
Yo()._Yo__bitch  # True

class O(object): pass
O() == O()             # False
O() is O()             # False
hash(O()) == hash(O()) # True !
id(O()) == id(O())     # True !!!
# ANSWER: http://stackoverflow.com/a/3877275/636849

json.loads('[NaN]') # [nan]
json.loads('[-Infinity]') # [-inf]

int('١٢٣٤٥٦٧٨٩') # 123456789 - cf. http://chris.improbable.org/2014/8/25/adventures-in-unicode-digits/

# Implicit type conversion of keys in dicts
d = {'a':42}
print type(d.keys()[0]) # str
class A(str): pass
a = A('a')
d[a] = 42
print d # {'a':42}
print type(d.keys()[0]) # str

# Those final ones are taken from cosmologicon Python wats quiz
'abc'.count('') == 4
1000000 < '' and () > []  # "objects of different types except numbers are ordered by their type names"
False == False in [False]

[3,2,1] < [1,3]  # False
[1,2,3] < [1,3]  # True

x, y = (0, 1) if True else None, None # -> ((0, 1), None)
x, y = (0, 1) if True else (None, None) # -> (0, 1)