poros

n = min(len(names), len(colors))
for i in range(n):
    print names[i], colors[i]
    

for names, color in zip(names, colors):
    print name, color

#collections.izip is the iterator version

poros

for i in range(len(colors)):
    print i, colors[i]
  
  
for i, colors in enumerate(colors):
    print i, colors
# retuns enumerate object, not a list

poros

matrix = [[1,2,3]] * 4
[[1, 2, 3], [1, 2, 3], [1, 2, 3], [1, 2, 3]]

# FLATTEN THE MATRIX
flatten = []
for row in matrix:
    for i in range(3):
        flatten.append(row[i])

[row[i] for row in matrix for i in range(3)]

poros

[x**2 for x in (2,4,6)]

{x: x**2 for x in (2, 4, 6)}

{x for x in 'abracadabra' if x not in 'abc'}

poros

try:
    f = open(filename, 'r')
except IOError as e:
    print 'cannot open ', filename
    print "I/O error({0}): {1}".format(e.errno, e.strerror)
except:
    log.exception("Unexpected error")
    # print "Unexpected error:", sys.exc_info()[0]
    raise
else:

poros

'lmnop' in 'abcdefghijklmnopqrstuvwxyz'


index = 'python'.find('on')  # 4 

poros

if x % 2 == 0:
    return True
return False

bool(x % 2 == 0)

poros

for x in numbers:
    if x % 2 != 0:
        return False
return True

all(x % 2 == 0 for x in numbers)
# it's a generator, stops at the first occurrence

poros

for x in numbers:
    if x % 2 == 0:
        return True
return False

any(x % 2 == 0 for x in numbers)
# it's a generator, stops at the first occurrence

poros

dict(izip(keys, values))
# reuses the same tuple!