Yes: spam(ham[1], {eggs: 2}, [])

No:  spam( ham[ 1 ], { eggs: 2 }, [ ] )

Yes: if x == 4:
         print x, y
     x, y = y, x

No:  if x == 4 :
         print x , y
     x , y = y , x

Yes: spam(1)

no: spam (1)

Yes: dict['key'] = list[index]

No:  dict ['key'] = list [index]

Yes: x == 1

No:  x<1
当'='用于指示关键字参数或默认参数值时, 不要在其两侧使用空格.

Yes: def complex(real, imag=0.0): return magic(r=real, i=imag)

No:  def complex(real, imag = 0.0): return magic(r = real, i = imag)
- 不要用空格来垂直对齐多行间的标记, 因为这会成为维护的负担(适用于:, #, =等):

Yes:
     foo = 1000  # comment
     long_name = 2  # comment that should not be aligned

     dictionary = {
         "foo": 1,
         "long_name": 2,
         }

No:
     foo       = 1000  # comment
     long_name = 2     # comment that should not be aligned

     dictionary = {
         "foo"      : 1,
         "long_name": 2,
         }

Args:
    列出每个参数的名字, 并在名字后使用一个冒号和一个空格, 分隔对该参数的描述.如果描述太长超过了单行80字符,使用2或者4个空格的悬挂缩进(与文件其他部分保持一致).
    描述应该包括所需的类型和含义.
    如果一个函数接受*foo(可变长度参数列表)或者**bar (任意关键字参数), 应该详细列出*foo和**bar.

Returns: (或者 Yields: 用于生成器)
    描述返回值的类型和语义. 如果函数返回None, 这一部分可以省略.

Raises:
    列出与接口有关的所有异常.

def fetch_bigtable_rows(big_table, keys, other_silly_variable=None):
    """Fetches rows from a Bigtable.

    Retrieves rows pertaining to the given keys from the Table instance
    represented by big_table.  Silly things may happen if
    other_silly_variable is not None.

    Args:
        big_table: An open Bigtable Table instance.
        keys: A sequence of strings representing the key of each table row
            to fetch.
        other_silly_variable: Another optional variable, that has a much
            longer name than the other args, and which does nothing.

    Returns:
        A dict mapping keys to the corresponding table row data
        fetched. Each row is represented as a tuple of strings. For
        example:

        {'Serak': ('Rigel VII', 'Preparer'),
         'Zim': ('Irk', 'Invader'),
         'Lrrr': ('Omicron Persei 8', 'Emperor')}

        If a key from the keys argument is missing from the dictionary,
        then that row was not found in the table.

    Raises:
        IOError: An error occurred accessing the bigtable.Table object.
    """
    pass

class SampleClass(object):
    """Summary of class here.

    Longer class information....
    Longer class information....

    Attributes:
        likes_spam: A boolean indicating if we like SPAM or not.
        eggs: An integer count of the eggs we have laid.
    """

    def __init__(self, likes_spam=False):
        """Inits SampleClass with blah."""
        self.likes_spam = likes_spam
        self.eggs = 0

    def public_method(self):
        """Performs operation blah."""

# We use a weighted dictionary search to find out where i is in
# the array.  We extrapolate position based on the largest num
# in the array and the array size and then do binary search to
# get the exact number.

if i & (i-1) == 0:        # true iff i is a power of 2

# BAD COMMENT: Now go through the b array and make sure whenever i occurs
# the next element is i+1

# TODO(kl@gmail.com): Use a "*" here for string repetition.
# TODO(Zeke) Change this to use relations.

Yes: import os
     import sys

No:  import os, sys

import foo
from foo import bar
from foo.bar import baz
from foo.bar import Quux
from Foob import ar