#
# BASIC DATA STRUCTURE
# -------------------------

# Swap two numbers
a, b = b, a

# List flattening
print(list(itertools.chain(*my_list)))

# Merge two dicts
{**d1, **d2}

# Reverse key, value in a dict
{v: k for k, v in d.items()}

# Transpose a matrix
list(zip(*matrix))

#
# OOP
# -------------------------

# One-Line Constructors
class A(object):
    def __init__(self, a, b, c, d, e, f):
        self.__dict__.update({k: v for k, v in locals().items() if k != 'self'})

#
# FILE MANIPULATION
# -------------------------

# Reading lines as arrays from a file
lines = [line.strip() for line in open('foo.txt')]

# Read rows of a csv file
with open('foo.csv', 'r') as f: rows = [line.strip().split(',') for line in f.readlines()]

# CSV file to json
python -c "import csv,json;print(json.dumps(list(csv.reader(open('2017.csv')))))"

#
# MISC
# -------------------------

# Print a 9 * 9 multiplication table
print('\n'.join([' '.join([f'{x}*{y}={x*y}' for x in range(1,y+1)]) for y in range(1,10)]))

# Print a heart
print('\n'.join([''.join([('OhMyLove'[(x-y)%8]if((x*0.05)**2+(y*0.1)**2-1)**3-(x*0.05)**2*(y*0.1)**3<=0 else' ')for x in range(-30,30)])for y in range(15,-15,-1)]))

# Generate an infinite maze
python -c "while 1:import random;print(random.choice('|| __'), end='')" 

# Simulate a slot machine
python -c "import random;p=lambda:random.choice('7♪♫♣♠♦♥◄☼☽');[print('|'.join([p(),p(),p()]),end='\r') for i in range(8**5)]"

# Guess number game
python -c "import random;n=random.randint(1,99);[(lambda a:print('Y' if a==n else 'H' if a>n else 'L'))(int(input())) for i in range(6)]"