python tricks

cities = [‘Marseille‘, ‘Amsterdam‘, ‘New York‘, ‘Londom‘]

# the good way
for i, city in enumerate(cities):
    print(i, city)

x_list = [1, 2, 3]
y_list = [2, 4, 6]

# the good way
for x, y in zip(x_list, y_list):
    print (x, y)

x = 10
y = -10

# the good way
x, y = y, x
print (‘After: x = %d, y = %d‘ % (x, y))

ages = {
    ‘Mary‘      : 31,
    ‘Honathan‘ : 28
}

# the good way
age = ages.get(‘Dick‘, ‘Unknow‘)
print (‘Dick is %s years old‘ % age)

needle = ‘d‘
haystack = [‘a‘, ‘b‘, ‘c‘, ‘d‘]
# the good way
for letter in haystack:
    if needle == letter:
        print (‘Found!‘)
        break
else:
    print (‘Not found!‘)

# the good way
with open(‘pimpin-aint-easy.txt‘) as f:
    for line in f:
        print (line)

print (‘Converting!‘)
try:
    print (int(‘1‘))
except:
    print (‘Conversion failed!‘)
else:
    print (‘Conversion uccessful!‘)
finally:
    print (‘Done!‘)