我想将abc.conf文件中的字符串设置为变量的名称，例如ProductNo，ProdName。
这可行吗？
abc.conf：
ProductNo=>//ProductNo
ProdName=>//ProdName
ProdClass=>//ProdClass
ProdLimit=>//ProdLimit
ProdProfit=>//ProdProfit
ProdYildType=>//ProdYildType
PrdYildTypeOrder=>//PrdYildTypeOrder
ProdArea=>//ProdArea
szComDat=>//szComDat
ProdSaleDate=>//ProdSaleDate
IsCanBuy=>//IsCanBuy
PurStarAmo=>//PurStarAmo
RowNumber=>//RowNumber
朱莉娅琅：
using LibExpat
using Requests
url = "http://ewealth.abchina.com/app/data/api/DataService/BoeProductV2?i=1&s=1500&o=0&w=%25E5%258F%25AF%25E5%2594%25AE%257C%257C%257C%257C%257C%257C%257C1%257C%257C0%257C%257C0"
xdoc = xp_parse(readstring(get(url)))
function ABC()
open("abc.conf", "r") do f
for line in eachline(f)
xml = split(line, "=>")
#MethodError: Cannot `convert` an object of type Array{LibExpat.ETree,1} to an object of type SubString{String}
xml[1] = LibExpat.find(xdoc, xml[2])
println(ProductNo)
end
close(f)
end
end
ABC()
答案 0 :(得分：0)
是的！这在朱莉娅是可行的。它可以这样做，注意不要无声地覆盖标识符：
using LibExpat: ETree, xp_parse
using Requests: get
const xp_find = LibExpat.find
function process_xpdoc_config(prefix::String, config::String, xp_doc::ETree)::Dict{String, Vector{ETree}}
dict = Dict{String, Vector{ETree}}()
open(config) do file
for line in eachline(file)
if !isempty(line)
xml = split(line, "=>")
if length(xml) == 2
identifier = Symbol(xml[1])
prefixed_identifier = Symbol(uppercase(prefix), '_', identifier)
value = xp_find(xp_doc, xml[2])
if !isdefined(prefixed_identifier)
@eval $prefixed_identifier = $value
info("defined $prefixed_identifier")
else
warn("$prefixed_identifier already defined!")
end
push!(dict, string(identifier) => value)
end
end
end
end
return dict
end
url = "http://ewealth.abchina.com/app/data/api/DataService/BoeProductV2?i=1&s=1500&o=0&w=%25E5%258F%25AF%25E5%2594%25AE%257C%257C%257C%257C%257C%257C%257C1%257C%257C0%257C%257C0"
xp_doc = get(url) |> readstring |> xp_parse
abc_conf = "abc.conf"
prefix = "abc"
@eval julia> ABC = process_xpdoc_config(prefix, abc_conf, xp_doc)
WARNING: ABC_ProductNo already defined!
INFO: defined ABC_ProdName
INFO: defined ABC_ProdClass
INFO: defined ABC_ProdLimit
INFO: defined ABC_ProdProfit
INFO: defined ABC_ProdYildType
INFO: defined ABC_PrdYildTypeOrder
INFO: defined ABC_ProdArea
INFO: defined ABC_szComDat
INFO: defined ABC_ProdSaleDate
INFO: defined ABC_IsCanBuy
INFO: defined ABC_PurStarAmo
INFO: defined ABC_RowNumber
Dict{String,Array{LibExpat.ETree,1}} with 13 entries:
"ProdLimit" => LibExpat.ETree[<ProdLimit>360天</ProdLimit>…
"ProdSaleDate" => LibExpat.ETree[<ProdSaleDate>18.01.12-18.01…
"RowNumber" => LibExpat.ETree[<RowNumber>1</RowNumber>, <R…
"PurStarAmo" => LibExpat.ETree[<PurStarAmo>50000.00</PurSta…
"ProdYildType" => LibExpat.ETree[<ProdYildType>非保本浮动收益…
"szComDat" => LibExpat.ETree[<szComDat>2018.01.12</szComD…
"ProdProfit" => LibExpat.ETree[<ProdProfit>4.95%</ProdProfi…
"ProdArea" => LibExpat.ETree[<ProdArea>全国发行</ProdArea…
"IsCanBuy" => LibExpat.ETree[<IsCanBuy>1</IsCanBuy>, <IsC…
"ProdClass" => LibExpat.ETree[<ProdClass>封闭</ProdClass>,…
"ProductNo" => LibExpat.ETree[<ProductNo>AD180022</Product…
⋮ => ⋮
julia> ABC["ProductNo"][1]
<ProductNo>AD180022</ProductNo>
最终您需要使用eval / @eval或定义一个新的宏来生成不带eval的代码，即：
macro process_xpdoc_config(prefix::String, config::String, xp_doc::Symbol)
_process_xpdoc_config(prefix, config, xp_doc)
end
function _process_xpdoc_config(prefix::String, config::String, xp_doc::Symbol)::Expr
block = Expr(:block)
push!(block.args, :(dict = Dict{String, Vector{ETree}}()))
open(config) do file
for line in eachline(file)
if !isempty(line)
xml = split(line, "=>")
if length(xml) == 2
identifier = Symbol(xml[1])
prefixed_identifier = Symbol(uppercase(prefix), '_', identifier)
if !isdefined(prefixed_identifier)
push!(block.args, esc(:($prefixed_identifier = xp_find($xp_doc, $xml[2]))))
info_str = string("defined ", prefixed_identifier)
push!(block.args, :(info($info_str)))
else
warn_str = string(prefixed_identifier, " already defined!")
push!(block.args, :(warn($warn_str)))
end
push!(block.args, :(push!(dict, string($(Meta.quot(identifier))) => xp_find($xp_doc, $xml[2]))))
end
end
end
end
push!(block.args, :(dict))
return block
end
eval julia> DEF_ProdName = 7
7
julia> DEF = @process_xpdoc_config("def", "abc.conf", xp_doc)
INFO: defined DEF_ProductNo
WARNING: DEF_ProdName already defined!
INFO: defined DEF_ProdClass
INFO: defined DEF_ProdLimit
INFO: defined DEF_ProdProfit
INFO: defined DEF_ProdYildType
INFO: defined DEF_PrdYildTypeOrder
INFO: defined DEF_ProdArea
INFO: defined DEF_szComDat
INFO: defined DEF_ProdSaleDate
INFO: defined DEF_IsCanBuy
INFO: defined DEF_PurStarAmo
INFO: defined DEF_RowNumber
Dict{String,Array{LibExpat.ETree,1}} with 13 entries:
"ProdLimit" => LibExpat.ETree[<ProdLimit>360天</ProdLi…
"ProdSaleDate" => LibExpat.ETree[<ProdSaleDate>18.01.12-1…
"RowNumber" => LibExpat.ETree[<RowNumber>1</RowNumber>…
"PurStarAmo" => LibExpat.ETree[<PurStarAmo>50000.00</Pu…
"ProdYildType" => LibExpat.ETree[<ProdYildType>非保本浮动…
"szComDat" => LibExpat.ETree[<szComDat>2018.01.12</sz…
"ProdProfit" => LibExpat.ETree[<ProdProfit>4.95%</ProdP…
"ProdArea" => LibExpat.ETree[<ProdArea>全国发行</Prod…
"IsCanBuy" => LibExpat.ETree[<IsCanBuy>1</IsCanBuy>, …
"ProdClass" => LibExpat.ETree[<ProdClass>封闭</ProdCla…
"ProductNo" => LibExpat.ETree[<ProductNo>AD180022</Pro…
"PrdYildTypeOrder" => LibExpat.ETree[<PrdYildTypeOrder>2</Prd…
"ProdName" => LibExpat.ETree[<ProdName>“金钥匙·安心得…
julia> DEF<TAB>
julia> DEF
DEF DEF_ProdProfit
DEF_IsCanBuy DEF_ProdSaleDate
DEF_PrdYildTypeOrder DEF_ProdYildType
DEF_ProdArea DEF_ProductNo
DEF_ProdClass DEF_PurStarAmo
DEF_ProdLimit DEF_RowNumber
DEF_ProdName DEF_szComDat
julia> DEF["ProdName"][1]
<ProdName>“金钥匙·安心得利”2018年第1期多次派息人民币理财产品</ProdName>
请注意，使用do时无需手动关闭文件。
您也可以根据@DNF的建议构建Dict以供日后使用（例如，您可以将其保存，然后再次使用JLD.jl加载），甚至可以同时执行这两项操作。