how to write a correct python code code example

Example 1: how to write a correct python code

# Another possible scenario# You got a reward amount from somewhere else, but don't know if None/0 or notreward = reward_known or "500 dollars"# The above line of code is equivalent to belowreward = reward_known if reward_known else "500 dollars"

Example 2: how to write a correct python code

# The typical wayif score > 90:    reward = "1000 dollars"else:    reward = "500 dollars"# Do this insteadreward = "1000 dollars" if score > 90 else "500 dollars"

Example 3: how to write a correct python code

my_very_big_string = (
    "For a long time I used to go to bed early. Sometimes, "
    "when I had put out my candle, my eyes would close so quickly "
    "that I had not even time to say “I’m going to sleep.”"
)

from some.deep.module.inside.a.module import (
    a_nice_function, another_nice_function, yet_another_nice_function)

Example 4: how to write a correct python code

a = [3, 4, 5]
a = [i + 3]

Example 5: how to write a correct python code

a = [3, 4, 5]
b = a

# assign the variable "a" to a new list without changing "b"
a = [i + 3 for i in a]

Example 6: how to write a correct python code

d = {'hello': 'world'}

print(d.get('hello', 'default_value')) # prints 'world'
print(d.get('thingy', 'default_value')) # prints 'default_value'

# Or:
if 'hello' in d:
    print(d['hello'])

Example 7: how to write a correct python code

$ pycodestyle optparse.py
optparse.py:69:11: E401 multiple imports on one line
optparse.py:77:1: E302 expected 2 blank lines, found 1
optparse.py:88:5: E301 expected 1 blank line, found 0
optparse.py:222:34: W602 deprecated form of raising exception
optparse.py:347:31: E211 whitespace before '('
optparse.py:357:17: E201 whitespace after '{'
optparse.py:472:29: E221 multiple spaces before operator
optparse.py:544:21: W601 .has_key() is deprecated, use 'in'

Example 8: how to write a correct python code

four_lists = [[] for __ in range(4)]

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