我似乎无法在字符串的parse()方法上找到任何文档。有一个很好的参考?我想解析以下内容:
frame 0 rows {3 2 3 3 3 3 2 3 2 3 3 3 2 3 2 3 4 3 3 4 3 2 2 3 3 3 2 2 2 2 3 3 3 2 3 2 3 3 3 3 4 3 4 3 3 3 3 4 3 2 3 3 3 3 2 2 2 4 4 3 3 3 3 3 4 4 4 3 2 4 3 4 3 3 3 4 3 3 4 3 3 4 4 3 3 3 4 4 3 4 3 3 3 3 3 4} columns {2 3 2 3 3 3 4 3 3 2 3 2 2 2 3 2 3 3 2 2 2 3 3 3 3 2 3 3 3 2 3 3 2 2 2 3 3 4 3 3 3 3 3 3 3 3 2 3 3 3 3 4 3 2 3 2 3 3 3 3 3 2 2 3 3 3 3 2 3 3 3 3 3 3 3 3 3 4 3 3 3 3 3 4 3 3 4 3 4 4 4 3 4 4 4 4 4 4 3 3 4 4 3 4 4 4 4 3 3 3 4 4 3 4 4 3 3 4 3 5 5 5 5 4 5 4 4 4}
分为两个int。
列表答案 0 :(得分:5)
Python字符串'parse()在这里不会帮助你(它有一个非常模糊的用法)。在这种情况下,我会以明显的方式做到这一点:使用正则表达式!如果's'是你上面的字符串,
import re
lists = [
[int(i) for i in match.split()]
for match in re.findall(r'{(.*?)}', s)
]
print lists
答案 1 :(得分:1)
>>> a="frame 0 rows {3 2 3 3 3 3 2 3 2 3 3 3 2 3 2 3 4 3 3 4 3 2 2 3 3 3 2 2 2 2 3 3 3 2 3 2 3 3 3 3 4 3 4 3 3 3 3 4 3 2 3 3 3 3 2 2 2 4 4 3 3 3 3 3 4 4 4 3 2 4 3 4 3 3 3 4 3 3 4 3 3 4 4 3 3 3 4 4 3 4 3 3 3 3 3 4} columns {2 3 2 3 3 3 4 3 3 2 3 2 2 2 3 2 3 3 2 2 2 3 3 3 3 2 3 3 3 2 3 3 2 2 2 3 3 4 3 3 3 3 3 3 3 3 2 3 3 3 3 4 3 2 3 2 3 3 3 3 3 2 2 3 3 3 3 2 3 3 3 3 3 3 3 3 3 4 3 3 3 3 3 4 3 3 4 3 4 4 4 3 4 4 4 4 4 4 3 3 4 4 3 4 4 4 4 3 3 3 4 4 3 4 4 3 3 4 3 5 5 5 5 4 5 4 4 4}"
>>> import ast
>>> import re
>>> for match in re.finditer("\{([\d ]+)\}",a):
integers=match.groups()[0]
l=ast.literal_eval(integers.replace(" ",","))
print l
(3, 2, 3, 3, 3, 3, 2, 3, 2, 3, 3, 3, 2, 3, 2, 3, 4, 3, 3, 4, 3, 2, 2, 3, 3, 3, 2, 2, 2, 2, 3, 3, 3, 2, 3, 2, 3, 3, 3, 3, 4, 3, 4, 3, 3, 3, 3, 4, 3, 2, 3, 3, 3, 3, 2, 2, 2, 4, 4, 3, 3, 3, 3, 3, 4, 4, 4, 3, 2, 4, 3, 4, 3, 3, 3, 4, 3, 3, 4, 3, 3, 4, 4, 3, 3, 3, 4, 4, 3, 4, 3, 3, 3, 3, 3, 4)
(2, 3, 2, 3, 3, 3, 4, 3, 3, 2, 3, 2, 2, 2, 3, 2, 3, 3, 2, 2, 2, 3, 3, 3, 3, 2, 3, 3, 3, 2, 3, 3, 2, 2, 2, 3, 3, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 3, 3, 3, 3, 4, 3, 2, 3, 2, 3, 3, 3, 3, 3, 2, 2, 3, 3, 3, 3, 2, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 3, 3, 3, 3, 3, 4, 3, 3, 4, 3, 4, 4, 4, 3, 4, 4, 4, 4, 4, 4, 3, 3, 4, 4, 3, 4, 4, 4, 4, 3, 3, 3, 4, 4, 3, 4, 4, 3, 3, 4, 3, 5, 5, 5, 5, 4, 5, 4, 4, 4)
我从未听说过以你问的方式实际解析字符串的解析方法。但是,解析该字符串并不难。这是怎么做的。
答案 2 :(得分:1)
对于这种结构良好的数据,pyparsing可能比你需要的更多,但它提供了一个很好的教程示例:
from pyparsing import *
s = "frame 0 rows {3 2 3 3 3 3 2 3 2 3 3 3 2 3 2 3 4 3 3 4 3 2 2 3 3 3 2 2 2 2 3 3 3 2 3 2 3 3 3 3 4 3 4 3 3 3 3 4 3 2 3 3 3 3 2 2 2 4 4 3 3 3 3 3 4 4 4 3 2 4 3 4 3 3 3 4 3 3 4 3 3 4 4 3 3 3 4 4 3 4 3 3 3 3 3 4} columns {2 3 2 3 3 3 4 3 3 2 3 2 2 2 3 2 3 3 2 2 2 3 3 3 3 2 3 3 3 2 3 3 2 2 2 3 3 4 3 3 3 3 3 3 3 3 2 3 3 3 3 4 3 2 3 2 3 3 3 3 3 2 2 3 3 3 3 2 3 3 3 3 3 3 3 3 3 4 3 3 3 3 3 4 3 3 4 3 4 4 4 3 4 4 4 4 4 4 3 3 4 4 3 4 4 4 4 3 3 3 4 4 3 4 4 3 3 4 3 5 5 5 5 4 5 4 4 4}"
LBRACE,RBRACE = map(Suppress,"{}")
integer = Word(nums).setParseAction(lambda t:int(t[0]))
line = ("frame" + integer("frame") +
"rows" + LBRACE + ZeroOrMore(integer)("rows") + RBRACE +
"columns" + LBRACE + ZeroOrMore(integer)("columns") + RBRACE )
data = line.parseString(s)
print data.frame
print data.rows[:10]
print data.columns[:10]
打印:
0
[3, 2, 3, 3, 3, 3, 2, 3, 2, 3]
[2, 3, 2, 3, 3, 3, 4, 3, 3, 2]
答案 3 :(得分:0)
在命令行中键入pydoc -p 5000 然后到了http://localhost:5000/string.html#Formatter-parse
答案 4 :(得分:0)
m_string = "frame 0 rows {3 2 3 3 3 3 2 3 2 3 3 3 2 3 2 3 4 3 3 4 3 2 2 3 3 3 2 2 2 2 3 3 3 2 3 2 3 3 3 3 4 3 4 3 3 3 3 4 3 2 3 3 3 3 2 2 2 4 4 3 3 3 3 3 4 4 4 3 2 4 3 4 3 3 3 4 3 3 4 3 3 4 4 3 3 3 4 4 3 4 3 3 3 3 3 4} columns {2 3 2 3 3 3 4 3 3 2 3 2 2 2 3 2 3 3 2 2 2 3 3 3 3 2 3 3 3 2 3 3 2 2 2 3 3 4 3 3 3 3 3 3 3 3 2 3 3 3 3 4 3 2 3 2 3 3 3 3 3 2 2 3 3 3 3 2 3 3 3 3 3 3 3 3 3 4 3 3 3 3 3 4 3 3 4 3 4 4 4 3 4 4 4 4 4 4 3 3 4 4 3 4 4 4 4 3 3 3 4 4 3 4 4 3 3 4 3 5 5 5 5 4 5 4 4 4}"
import re
print [[ int(i) for i in x.split(" ")] for x in [ match for match in re.findall("\{([\d ]+)\}", m_string)] ]
结果:
[[3,3,3,3,3,3,2,3,2,3,3,3, 2,3,3,3,3,3,4,3,2,2,3,3, 3,2,2,2,3,3,3,3,3,3,3,3, 3,3,4,3,4,3,3,3,3,4,3,2,3, 3,3,3,2,2,4,4,3,3,3,3,3, 4,4,3,3,2,4,3,4,3,3,3,4,3, 3,4,3,3,4,3,3,3,3,4,4,4,4, 3,3,3,3,3,4],[2,3,3,3,3,3, 4,3,3,2,3,2,2,2,3,2,3,3,2, 2,2,3,3,3,3,3,3,3,3,3,3,3, 2,2,3,3,4,3,3,3,3,3,3,3, 3,2,3,3,3,3,4,3,2,3,2,3,3, 3,3,3,2,3,3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3,3,3,3,3,4, 3,3,4,3,4,4,4,3,4,4,4,4,4, 4,3,3,4,4,3,4,4,4,4,3,3,3, 4,4,3,4,3,3,3,4,3,5,5,5,5, 4,5,4,4,4]]