def lambda_planets_aggregate_by_population():
"""Lambda function #5."""
data = get_planets_data()
known_population = list(
filter(lambda a: a['population'] is not 'unknown', data))
unknown_population = list(
filter(lambda a: a['population'] is 'unknown', data))
planet_with_max_population = max(known_population,
key=lambda a: int(a['population']))
max_population = int(planet_with_max_population['population'])
x = y = 1
while x < max_population:
x *= 10
y += 1
aggregate_population_ranges = [{'from': 0, 'to': 10}]
l = 10
for i in range(y - 1):
k = l
l = 10**(i + 2)
r = {'from': k, 'to': l}
aggregate_population_ranges.append(r)
aggregate_planets_by_population = {}
for rg in aggregate_population_ranges:
aggregate_planets_by_population[str(rg['from']) + '-' + str(
rg['to'])] = list(
filter(lambda a: rg['from'] <= int(a['population']) < rg['to'],
known_population))
aggregate_planets_by_population['unknown'] = unknown_population
pp(aggregate_planets_by_population)
def lambda_planets_rotation_period():
"""Lambda function #1."""
data = get_planets_data()
sorted_by_rotation_period = sorted(data,
key=lambda a: a['rotation_period'],
reverse=False)
pp(sorted_by_rotation_period)
def lambda_planets_diameter_to_orbital_period():
"""Lambda function #6."""
data = get_planets_data()
current_data = list(
filter(
lambda a: a['diameter'] is not 'unknown' and a['diameter'] is not '0' and a['orbital_period'] is not 'unknown' and a['orbital_period'] is not '0', data))
min_planet = min(current_data, key=lambda a: float(a['diameter'])/float(a['orbital_period']))
print('PLANET')
print('-' * 30)
pp(min_planet)
def lambda_planets_orbital_period():
"""Lambda function #3."""
data = get_planets_data()
current_data = list(
filter(
lambda a: a['surface_water'] is not 'unknown' and a[
'orbital_period'] is not 'unknown', data))
min_orbital_period = min(current_data, key=lambda a: a['orbital_period'])
max_orbital_period = max(current_data, key=lambda a: a['orbital_period'])
print('MIN ORBITAL PERIOD')
print('-' * 30)
pp(min_orbital_period)
print('MAX ORBITAL PERIOD')
print('-' * 30)
pp(max_orbital_period)
def lambda_planets_smallest_and_biggest():
"""Lambda function #4."""
data = get_planets_data()
current_data = list(
filter(
lambda a: a['diameter'] is not 'unknown' and a['diameter'] is
not '0', data))
smallest_planet = min(current_data,
key=lambda a: 4 * math.pi *
(float(a['diameter']) / 2)**2)
biggest_planet = max(current_data,
key=lambda a: 4 * math.pi *
(float(a['diameter']) / 2)**2)
print('SMALLEST PLANET')
print('-' * 30)
pp(smallest_planet)
print('BIGGEST PLANET')
print('-' * 30)
pp(biggest_planet)
def lambda_planets_no_water():
"""Lambda function #2."""
data = get_planets_data()
no_water = list(filter(lambda a: a['surface_water'] == '0', data))
pp(no_water)