正如PEP8所建议的那样，在python程序中保持低于80列的规则，对于长字符串，我怎么能遵守这个规则呢?
s = "this is my really, really, really, really, really, really, really long string that I'd like to shorten."
我该如何把它扩展到下面一行呢?
s = "this is my really, really, really, really, really, really" +
"really long string that I'd like to shorten."
当前回答
如果你必须插入一个长字符串文字，并希望flake8关闭，你可以使用它的关闭指令。例如，在一个测试例程中，我定义了一些假的CSV输入。我发现把它分成更多行会非常混乱，所以我决定添加一个# noqa: E501，如下所示:
csv_test_content = """"STATION","DATE","SOURCE","LATITUDE","LONGITUDE","ELEVATION","NAME","REPORT_TYPE","CALL_SIGN","QUALITY_CONTROL","WND","CIG","VIS","TMP","DEW","SLP","AA1","AA2","AY1","AY2","GF1","MW1","REM"
"94733099999","2019-01-03T22:00:00","4","-32.5833333","151.1666666","45.0","SINGLETON STP, AS","FM-12","99999","V020","050,1,N,0010,1","22000,1,9,N","025000,1,9,9","+0260,1","+0210,1","99999,9","24,0000,9,1",,"0,1,02,1","0,1,02,1","01,99,1,99,9,99,9,99999,9,99,9,99,9","01,1","SYN05294733 11/75 10502 10260 20210 60004 70100 333 70000="
"94733099999","2019-01-04T04:00:00","4","-32.5833333","151.1666666","45.0","SINGLETON STP, AS","FM-12","99999","V020","090,1,N,0021,1","22000,1,9,N","025000,1,9,9","+0378,1","+0172,1","99999,9","06,0000,9,1",,"0,1,02,1","0,1,02,1","03,99,1,99,9,99,9,99999,9,99,9,99,9","03,1","SYN04294733 11/75 30904 10378 20172 60001 70300="
"94733099999","2019-01-04T22:00:00","4","-32.5833333","151.1666666","45.0","SINGLETON STP, AS","FM-12","99999","V020","290,1,N,0057,1","99999,9,9,N","020000,1,9,9","+0339,1","+0201,1","99999,9","24,0000,9,1",,"0,1,02,1","0,1,02,1",,"02,1","SYN05294733 11970 02911 10339 20201 60004 70200 333 70000="
"94733099999","2019-01-05T22:00:00","4","-32.5833333","151.1666666","45.0","SINGLETON STP, AS","FM-12","99999","V020","200,1,N,0026,1","99999,9,9,N","000100,1,9,9","+0209,1","+0193,1","99999,9","24,0004,3,1",,"1,1,02,1","1,1,02,1","08,99,1,99,9,99,9,99999,9,99,9,99,9","51,1","SYN05294733 11/01 82005 10209 20193 69944 75111 333 70004="
"94733099999","2019-01-08T04:00:00","4","-32.5833333","151.1666666","45.0","SINGLETON STP, AS","FM-12","99999","V020","070,1,N,0026,1","22000,1,9,N","025000,1,9,9","+0344,1","+0213,1","99999,9","06,0000,9,1",,"2,1,02,1","2,1,02,1","04,99,1,99,9,99,9,99999,9,99,9,99,9","02,1","SYN04294733 11/75 40705 10344 20213 60001 70222="
""" # noqa: E501
其他回答
您丢失了一个空格，您可能需要一个行延续字符，即。一个\。
s = "this is my really, really, really, really, really, really" + \
" really long string that I'd like to shorten."
甚至:
s = "this is my really, really, really, really, really, really" \
" really long string that I'd like to shorten."
parns也可以代替行续符，但可能会有人认为您打算使用元组，而只是忘记了逗号。举个例子:
s = ("this is my really, really, really, really, really, really"
" really long string that I'd like to shorten.")
对比:
s = ("this is my really, really, really, really, really, really",
" really long string that I'd like to shorten.")
使用Python的动态类型，代码可以以任何一种方式运行，但会产生不正确的结果。
使用黑色[https://github.com/psf/black]，我像这样格式化它。
help=f"""filters, lista de filtros para cargar las base de conocimiento.
Pueden mandarse solo algunos filtros ya que no son obligatorios,
por ejemplo, si no se manda sts, se cargarán todos las bases de todos los estados.""",
使用\你可以将语句扩展到多行:
s = "this is my really, really, really, really, really, really" + \
"really long string that I'd like to shorten."
应该工作。
message = f"Variable : child({type(child)}) -> is not of"\
" type Node."
这个语法适合我。注意第二个语句的缩进，它应该缩进正确。
隐式连接可能是最干净的解决方案:
s = "this is my really, really, really, really, really, really," \
" really long string that I'd like to shorten."
编辑经过反思，我同意托德的建议，使用括号而不是行接续更好，因为他给出了所有的理由。我唯一的犹豫是，用括号括起来的字符串和元组比较容易混淆。
