parsing

问题 So I have a 52M xml file, which consists of 115139 elements. from lxml import etree tree = etree.parse(file) root = tree.getroot() In [76]: len(root) Out[76]: 115139 I have this function that iterates over the elements within root and inserts each parsed element inside a Pandas DataFrame. def fnc_parse_xml(file, columns): start = datetime.datetime.now() df = pd.DataFrame(columns=columns) tree = etree.parse(file) root = tree.getroot() xmlns = './/{' + root.nsmap[None] + '}' for loc,e in

问题 So I have a 52M xml file, which consists of 115139 elements. from lxml import etree tree = etree.parse(file) root = tree.getroot() In [76]: len(root) Out[76]: 115139 I have this function that iterates over the elements within root and inserts each parsed element inside a Pandas DataFrame. def fnc_parse_xml(file, columns): start = datetime.datetime.now() df = pd.DataFrame(columns=columns) tree = etree.parse(file) root = tree.getroot() xmlns = './/{' + root.nsmap[None] + '}' for loc,e in

问题 I have a string with structured data (see below). I need to take this string and convert it to an object, so I can export it to .csv (or whatever else is requested of me). I ran the following code: $data = $string -replace "\s*:\s*","=" But my output looks like this: City=Country=Department=DisplayName=John Doe DistinguishedName=CN=John Doe, CN=Users, DC=domain, DC=com EmailAddress=jdoe@domain.com Enabled=False Fax=GivenName=John MobilePhone=Name=John Doe ObjectClass=user ObjectGUID=cdb9a45c

问题 I have a string with structured data (see below). I need to take this string and convert it to an object, so I can export it to .csv (or whatever else is requested of me). I ran the following code: $data = $string -replace "\s*:\s*","=" But my output looks like this: City=Country=Department=DisplayName=John Doe DistinguishedName=CN=John Doe, CN=Users, DC=domain, DC=com EmailAddress=jdoe@domain.com Enabled=False Fax=GivenName=John MobilePhone=Name=John Doe ObjectClass=user ObjectGUID=cdb9a45c

问题 Traditionally, arithmetic operators are considered to be binary (left or right associative), thus most tools are dealing only with binary operators. Is there an easy way to parse arithmetic operators with Parsec, which can have an arbitrary number of arguments? For example, the following expression should be parsed into the tree (a + b) + c + d * e + f 回答1: Yes! The key is to first solve a simpler problem, which is to model + and * as tree nodes with only two children. To add four things, we

问题 Traditionally, arithmetic operators are considered to be binary (left or right associative), thus most tools are dealing only with binary operators. Is there an easy way to parse arithmetic operators with Parsec, which can have an arbitrary number of arguments? For example, the following expression should be parsed into the tree (a + b) + c + d * e + f 回答1: Yes! The key is to first solve a simpler problem, which is to model + and * as tree nodes with only two children. To add four things, we

问题 I am trying to parse some comma separated string which may or may not contain a string with image dimensions. For example "hello world, 300x300, good bye world" . I've written the following little program: import Text.Parsec import qualified Text.Parsec.Text as PS parseTestString :: Text -> [Maybe (Int, Int)] parseTestString s = case parse dimensStringParser "" s of Left _ -> [Nothing] Right dimens -> dimens dimensStringParser :: PS.Parser [Maybe (Int, Int)] dimensStringParser = (optionMaybe

问题 I am trying to parse some comma separated string which may or may not contain a string with image dimensions. For example "hello world, 300x300, good bye world" . I've written the following little program: import Text.Parsec import qualified Text.Parsec.Text as PS parseTestString :: Text -> [Maybe (Int, Int)] parseTestString s = case parse dimensStringParser "" s of Left _ -> [Nothing] Right dimens -> dimens dimensStringParser :: PS.Parser [Maybe (Int, Int)] dimensStringParser = (optionMaybe

问题 I am currently learning the FParsec library, but I have come across an issue. When I want to parse an optional string and continue parsing as normal afterwards, FParsec will return a fatal error on the optional parser, rather than returning None as I expect. The below working code sample illustrates my point: open System open FParsec type AccountEntity = | Default | Entity of string let pEntity = let isEntityFirstChar c = isLetter c let isEntityChar c = isLetter c || isDigit c (many1Satisfy2L

问题 I am currently learning the FParsec library, but I have come across an issue. When I want to parse an optional string and continue parsing as normal afterwards, FParsec will return a fatal error on the optional parser, rather than returning None as I expect. The below working code sample illustrates my point: open System open FParsec type AccountEntity = | Default | Entity of string let pEntity = let isEntityFirstChar c = isLetter c let isEntityChar c = isLetter c || isDigit c (many1Satisfy2L