其他人已经提到了圆括号方法，但我想补充一点，使用圆括号时，允许内联注释。

对每个片段的注释：

nursery_rhyme = (
    'Mary had a little lamb,'          # Comments are great!
    'its fleece was white as snow.'
    'And everywhere that Mary went,'
    'her sheep would surely go.'       # What a pesky sheep.
)

继续后不允许注释：

使用反斜杠行延续符（\）时，不允许使用注释。您将收到一个SyntaxError：一行接一行的连续字符错误。

nursery_rhyme = 'Mary had a little lamb,' \  # These comments
    'its fleece was white as snow.'       \  # are invalid!
    'And everywhere that Mary went,'      \
    'her sheep would surely go.'
# => SyntaxError: unexpected character after line continuation character

Regex字符串的更好注释：

基于以下示例https://docs.python.org/3/library/re.html#re.VERBOSE,

a = re.compile(
    r'\d+'  # the integral part
    r'\.'   # the decimal point
    r'\d*'  # some fractional digits
)

# Using VERBOSE flag, IDE usually can't syntax highight the string comment.
a = re.compile(r"""\d +  # the integral part
                   \.    # the decimal point
                   \d *  # some fractional digits""", re.X)

其他人已经提到了圆括号方法，但我想补充一点，使用圆括号时，允许内联注释。

对每个片段的注释：

nursery_rhyme = (
    'Mary had a little lamb,'          # Comments are great!
    'its fleece was white as snow.'
    'And everywhere that Mary went,'
    'her sheep would surely go.'       # What a pesky sheep.
)

继续后不允许注释：

使用反斜杠行延续符（\）时，不允许使用注释。您将收到一个SyntaxError：一行接一行的连续字符错误。

nursery_rhyme = 'Mary had a little lamb,' \  # These comments
    'its fleece was white as snow.'       \  # are invalid!
    'And everywhere that Mary went,'      \
    'her sheep would surely go.'
# => SyntaxError: unexpected character after line continuation character

Regex字符串的更好注释：

基于以下示例https://docs.python.org/3/library/re.html#re.VERBOSE,

a = re.compile(
    r'\d+'  # the integral part
    r'\.'   # the decimal point
    r'\d*'  # some fractional digits
)

# Using VERBOSE flag, IDE usually can't syntax highight the string comment.
a = re.compile(r"""\d +  # the integral part
                   \.    # the decimal point
                   \d *  # some fractional digits""", re.X)

试试这样的。类似于此格式，它将向您返回一条连续的行，就像您已成功询问此属性：

"message": f'You have successfully inquired about '
           f'{enquiring_property.title} Property owned by '
           f'{enquiring_property.client}'

我认为当代码（例如，变量）缩进并且输出字符串应该是单行（没有换行）时，另一个选项更可读：

def some_method():

    long_string = """
A presumptuous long string
which looks a bit nicer
in a text editor when
written over multiple lines
""".strip('\n').replace('\n', ' ')

    return long_string

为了在字典内定义长字符串，保留换行符但省略空格，我最终以如下常量定义字符串：

LONG_STRING = \
"""
This is a long sting
that contains newlines.
The newlines are important.
"""

my_dict = {
   'foo': 'bar',
   'string': LONG_STRING
}

我个人认为，以下是用Python编写原始SQL查询的最佳（简单、安全和Python化）方法，尤其是在使用Python的sqlite3模块时：

query = '''
    SELECT
        action.descr as action,
        role.id as role_id,
        role.descr as role
    FROM
        public.role_action_def,
        public.role,
        public.record_def,
        public.action
    WHERE
        role.id = role_action_def.role_id
        AND record_def.id = role_action_def.def_id
        AND action.id = role_action_def.action_id
        AND role_action_def.account_id = ?
        AND record_def.account_id = ?
        AND def_id = ?
'''
vars = (account_id, account_id, def_id)   # a tuple of query variables
cursor.execute(query, vars)   # using Python's sqlite3 module

Pros

整洁而简单的代码（Pythonic！）避免SQL注入与Python 2和Python 3兼容（毕竟是Pythonic）不需要字符串串联无需确保每行最右边的字符是空格

Cons

由于查询中的变量被替换为？占位符，它可能会变得有点难以跟踪哪个？当查询中有很多Python变量时，将由哪个Python变量替换。