project init

.gitignore

+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+env/
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+*.egg-info/
+.installed.cfg
+*.egg
+.idea
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*,cover
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+.settings/**
+.project
+.pydevproject

LICENSE

+The MIT License (MIT)
+
+Copyright (c) 2015 Dwarf Artisan
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

README.md

 # skill_tree_parser
 
-技能树结构（章节、元信息、习题）解释器，支持技能树结构和内容的分析、解释。
\ No newline at end of file
+技能树结构（章节、元信息、习题）解释器，支持技能树结构和内容的分析、解释。
+

setup.cfg

+[aliases]
+release = register sdist bdist_egg upload
+

setup.py

+#!/usr/bin/env python
+
+from setuptools import setup
+from pathlib import Path
+
+this_directory = Path(__file__).parent
+long_description = (this_directory / "README.md").read_text()
+
+setup(name="skill-tree-parser",
+      version="0.0.1",
+      description="CSDN Skill Tree Parser",
+      long_description=long_description,
+      long_description_content_type='text/markdown',
+      author="Liu Xin",
+      author_email="liuxin@csdn.net",
+      url="https://gitcode.net/csdn/skill_tree_parser",
+      license="MIT",
+      packages=["csdn", "test"],
+      package_dir={
+          "skill_tree": "src/skill_tree",
+          "test": "src/tests"
+      },
+      install_requires=[
+          "pyparsec",
+          "GitPython"
+      ],
+      classifiers=[
+          "Topic :: Utilities",
+          "Programming Language :: Python :: 3.5",
+          "Programming Language :: Python :: 3.6",
+          "Programming Language :: Python :: 3.7",
+          "Programming Language :: Python :: 3.8",
+          "Programming Language :: Python :: 3.9",
+          "Programming Language :: Python :: 3 :: Only",
+          "License :: OSI Approved :: MIT License"
+      ]
+      )

src/skill_tree/excercises/markdown.py

+import sys
+
+from parsec import one, eof
+from parsec.combinator import *
+from parsec.text import *
+from .market_math import processor
+
+"""
+使用 markdown 编写的问题应该总是一个固定格式，即
+
+# 问题标题
+
+问题描述
+
+## 模板
+
+```java
+package app;
+public class App {
+    public static void main(String[] args){
+        $code
+    }
+}
+```
+
+如果第一个二级标题为 template，则生成一个可选的 template 字段，template 章节中的代码段会作为代码模板，用于被生成的 notebook 
+
+## aop
+
+AOP（面向切面）章节定义 notebook 生成时插入的 cell ，如果定义了这个二级标题，其下复合定义的章节会插在必要的位置。
+
+### before
+
+这里的章节会写入到答案代码之前。
+
+### after
+
+这里的章节会写入到答案代码之后
+
+## 答案
+
+这里写正确答案。此处的代码会写入到 notebook 中，如过定义了模板章节，会将其合并后生成 notebook。
+
+```java
+```
+
+## 选项
+
+### A 选项标题会被忽略
+
+可选的描述
+
+```
+//  代码
+```
+
+### B
+
+可选的描述
+
+```
+//  代码
+```
+
+### C
+
+可选的描述
+
+```
+//  代码
+```
+
+### D
+
+可选的描述
+
+```
+//  代码
+```
+
+需要注意的是，选项的标题并不会出现在最终的题目中，仅作为编辑过程中的标注。而第一个选项就是答案。其顺序在最终展现时由服务代码进行混淆。
+
+"""
+
+
+class Paragraph:
+    def __init__(self, source="", language=""):
+        self.source = source
+        self.language = language
+
+    def isEmpty(self):
+        return self.source == "" and self.language == ""
+
+    def to_map(self):
+        return {"content": self.source, "language": self.language}
+
+
+class Option:
+    def __init__(self, paras=None):
+        self.paras = paras if paras else []
+
+    def to_map(self):
+        return [p.to_map() for p in self.paras]
+
+
+class Exercise:
+    def __init__(self, title, answer, description, options):
+        self.title = title
+        self.answer = answer
+        self.description = description
+        self.options = options
+
+
+@Parsec
+def spaces(state):
+    return skip1(space)(state)
+
+
+def maybe_spaces(state):
+    return skip(space)(state)
+
+
+def inline(state):
+    char = one(state)
+    if char == '\n':
+        raise ParsecError(state, "unexpected newline")
+    else:
+        return char
+
+
+@Parsec
+def title(state):
+    """
+    解析问题标题
+    """
+    parser = string("#").then(spaces).then(many1(inline)).over(string('\n'))
+    data = parser(state)
+    return "".join(data)
+
+
+@Parsec
+def chapter_title(state):
+    """
+    解析章标题
+    @param state:
+    @return:
+    """
+    parser = string("##").then(spaces).then(many1(inline)).over(string('\n'))
+    data = parser(state)
+    return "".join(data)
+
+
+@Parsec
+def section_title(state):
+    """
+    解析节标题
+    @param state:
+    @return:
+    """
+    parser = string("###").then(spaces).then(many1(inline)).over(string('\n'))
+    data = parser(state)
+    return "".join(data)
+
+
+@Parsec
+def paragraph(state):
+    """
+    解析文字段落
+    """
+    buffer = ""
+    line = many(inline).over(choice(attempt(string("\n")), eof))
+    stop = choices(attempt(string("\n")), attempt(string("### ")), string("## "))
+    while True:
+        maybe_spaces(state)
+        result = "".join(line(state))
+        data = result
+        if data:
+            buffer += '\n' + result
+        else:
+            break
+        tran = state.begin()
+        try:
+            stop(state)
+        except ParsecError:
+            continue
+        finally:
+            state.rollback(tran)
+        return Paragraph(processor(buffer), "markdown")
+
+    return Paragraph(processor(buffer), "markdown")
+
+
+@Parsec
+def code(state):
+    left = attempt(string("```")).then(many(attempt(inline))).over(string("\n"))
+    language = ''.join(left(state))
+    right = attempt(string("\n```").over(choice(attempt(string("\n")), eof)))
+    buffer = ""
+    while True:
+        try:
+            right(state)
+            return Paragraph(buffer, language)
+        except ParsecError:
+            buffer += one(state)
+
+
+@Parsec
+def desc(state):
+    """解析问题或选项描述
+    问题描述由若干段落或代码组成，内部结构遵循 markdown 语法
+    """
+    buffer = []
+    parser = choice(attempt(code), paragraph)
+    stop = choices(attempt(string("## ")), attempt(string("### ")), eof)
+    while True:
+        tran = state.begin()
+        try:
+            stop(state)
+            return buffer
+        except ParsecError:
+            pass
+        finally:
+            state.rollback(tran)
+
+        buffer.append(parser(state))
+        maybe_spaces(state)
+
+
+def option(state):
+    "解析选项"
+    parser = attempt(string("###").then(spaces).then(many1(attempt(inline))).over(string('\n')))
+    parser(state)
+    maybe_spaces(state)
+    return Option(desc(state))
+
+
+def template(state):
+    "解析模板，返回对应的模板代码对象，如果解析失败，返回 None 并恢复 state"
+    tran = state.begin()
+    try:
+        title = chapter_title(state)
+        if title == "template":
+            state.commit(tran)
+            maybe_spaces(state)
+            return code(state)
+        else:
+            raise ParsecError(state, "template not found")
+    except ParsecError:
+        state.rollback(tran)
+        return None
+
+
+@Parsec
+def aop_parser(state):
+    """
+    解析AOP，返回对应的AOP字典，如果解析失败，返回 None 并恢复 state
+    @param state:
+    @return:
+    """
+    result = {}
+    stop = attempt(chapter_title)
+    tt = state.begin()
+    try:
+        title = chapter_title(state)
+        if title == "aop":
+            state.commit(tt)
+            maybe_spaces(state)
+            while True:
+                tran = state.begin()
+                try:
+                    stop(state)
+                    state.rollback(tran)
+                    if len(result) == 0:
+                        return None
+                    else:
+                        return result
+                except ParsecError:
+                    state.rollback(tran)
+                    maybe_spaces(state)
+                    st = section_title(state)
+                    maybe_spaces(state)
+                    if st == "before":
+                        result["before"] = desc(state)
+                    elif st == "after":
+                        result["after"] = desc(state)
+                    else:
+                        raise ParsecError(state, f"invalid section {st} in aop chapter")
+
+        else:
+            raise ParsecError(state, "aop not found")
+    except ParsecError as err:
+        state.rollback(tt)
+        return None
+
+
+@Parsec
+def parse(state):
+    t = title(state)
+    maybe_spaces(state)
+    try:
+        description = desc(state)
+    except ParsecError as err:
+        raise err
+    tmpl = template(state)
+    maybe_spaces(state)
+    aop = aop_parser(state)
+    ct = chapter_title(state)
+    if ct == "答案":
+        maybe_spaces(state)
+        answer = desc(state)
+    else:
+        raise ParsecError(state, "chapter [答案] is required")
+    ct = chapter_title(state)
+    if ct == "选项":
+        maybe_spaces(state)
+        options = []
+        while True:
+            try:
+                opt = option(state)
+                options.append(opt)
+                maybe_spaces(state)
+            except ParsecError as err:
+                result = Exercise(t, answer, description, options)
+                if tmpl is not None:
+                    result.template = tmpl
+                if aop is not None:
+                    result.aop = aop
+                return result
+    else:
+        raise ParsecError(state, "chapter [选项] not found")

src/skill_tree/excercises/market_math.py

+from parsec.text import *
+from parsec.combinator import *
+from parsec.atom import *
+from parsec.state import BasicState
+
+side = string('$')
+
+
+@Parsec
+def escape(state):
+    c = state.next()
+    if c == "$":
+        return "$"
+    elif c == "\\":
+        return "\\"
+    elif c == "{":
+        return "{"
+    elif c == "}":
+        return '}'
+    else:
+        raise ParsecError(state, f"unknown escape char \\{c}")
+
+
+@Parsec
+def escaped(state):
+    c = state.next()
+    if c == '\\':
+        return escape(state)
+    elif c == "$":
+        raise ParsecError(state, "got stop char $")
+    else:
+        return c
+
+
+@Parsec
+def token_content(state):
+    buffer = ""
+    while True:
+        c = ahead(choice(one, eof))(state)
+        if c in ["{", "}", "^", "_", "$", None]:
+            return buffer
+        else:
+            buffer += escaped(state)
+
+
+@Parsec
+def superscript(state):
+    c = state.next()
+    if c == "{":
+        cnt = token_content(state)
+        string("}")(state)
+        return f"<sup>{cnt}</sup>"
+    else:
+        return f"<sup>{c}</sup>"
+
+
+@Parsec
+def subscript(state):
+    c = state.next()
+    if c == "{":
+        cnt = token_content(state)
+        string("}")(state)
+        return f"<sub>{cnt}</sub>"
+    else:
+        return f"<sub>{c}</sub>"
+
+
+@Parsec
+def content(state):
+    buffer = ""
+    side(state)
+    while True:
+        try:
+            tran = state.begin()
+            c = state.next()
+            if c == "$":
+                state.commit(tran)
+                return buffer
+            elif c == "^":
+                state.commit(tran)
+                buffer += superscript(state)
+            elif c == "_":
+                state.commit(tran)
+                buffer += subscript(state)
+            else:
+                state.rollback(tran)
+                cnt = token_content(state)
+                if cnt:
+                    buffer += cnt
+                else:
+                    raise ParsecError(state, f"unexpect content {state.data[state.index]}")
+        except ParsecEof:
+            raise ParsecError(state, f"expect right $ but eof")
+
+
+def processor(plain):
+    st = BasicState(plain)
+    buffer = ""
+    while True:
+        try:
+            tran = st.begin()
+            c = one(st)
+            if c == "$":
+                st.rollback(tran)
+                cnt = content(st)
+                if cnt:
+                    buffer += cnt
+                else:
+                    raise ParsecError(st, f"unexpect content {st.data[st.index]} ")
+            else:
+                st.commit(tran)
+                buffer += c
+
+        except ParsecEof:
+            return buffer

src/skill_tree/tree.py

+import json
+import logging
+import os
+import re
+import sys
+import uuid
+
+import git
+
+id_set = set()
+logger = logging.getLogger(__name__)
+logger.setLevel(logging.INFO)
+handler = logging.StreamHandler(sys.stdout)
+formatter = logging.Formatter('%(asctime)s - %(levelname)s - %(message)s')
+handler.setFormatter(formatter)
+logger.addHandler(handler)
+repo = git.Repo(".")
+
+
+def user_name():
+    return repo.config_reader().get_value("user", "name")
+
+
+def read_text(filepath):
+    with open(filepath, 'r', encoding='utf-8') as f:
+        return f.read()
+
+
+def load_json(p):
+    return json.loads(read_text(p))
+
+
+def dump_json(p, j, exist_ok=False, override=False):
+    if os.path.exists(p):
+        if exist_ok:
+            if not override:
+                return
+        else:
+            logger.error(f"{p} already exist")
+            sys.exit(0)
+
+    with open(p, 'w+', encoding="utf8") as f:
+        f.write(json.dumps(j, indent=2, ensure_ascii=False))
+
+
+def ensure_config(path):
+    config_path = os.path.join(path, "config.json")
+    if not os.path.exists(config_path):
+        node = {"keywords": []}
+        dump_json(config_path, node, exist_ok=True, override=False)
+        return node
+    else:
+        return load_json(config_path)
+
+
+def parse_no_name(d):
+    p = r'(\d+)\.(.*)'
+    m = re.search(p, d)
+
+    try:
+        no = int(m.group(1))
+        dir_name = m.group(2)
+    except:
+        sys.exit(0)
+
+    return no, dir_name
+
+
+def check_export(base, cfg):
+    flag = False
+    exports = []
+    for export in cfg.get('export', []):
+        ecfg_path = os.path.join(base, export)
+        if os.path.exists(ecfg_path):
+            exports.append(export)
+        else:
+            flag = True
+    if flag:
+        cfg["export"] = exports
+    return flag
+
+
+class TreeWalker:
+    def __init__(self, root, tree_name, title=None, log=None):
+        self.name = tree_name
+        self.root = root
+        self.title = tree_name if title is None else title
+        self.tree = {}
+        self.logger = logger if log is None else log
+
+    def walk(self):
+        root = self.load_root()
+        root_node = {
+            "node_id": root["node_id"],
+            "keywords": root["keywords"],
+            "children": []
+        }
+        self.tree[root["tree_name"]] = root_node
+        self.load_levels(root_node)
+        self.load_chapters(self.root, root_node)
+        for index, level in enumerate(root_node["children"]):
+            level_title = list(level.keys())[0]
+            level_node = list(level.values())[0]
+            level_path = os.path.join(self.root, f"{index + 1}.{level_title}")
+            self.load_chapters(level_path, level_node)
+            for index, chapter in enumerate(level_node["children"]):
+                chapter_title = list(chapter.keys())[0]
+                chapter_node = list(chapter.values())[0]
+                chapter_path = os.path.join(level_path, f"{index + 1}.{chapter_title}")
+                self.load_sections(chapter_path, chapter_node)
+                for index, section_node in enumerate(chapter_node["children"]):
+                    section_title = list(section_node.keys())[0]
+                    full_path = os.path.join(chapter_path, f"{index + 1}.{section_title}")
+                    if os.path.isdir(full_path):
+                        self.check_section_keywords(full_path)
+                        self.ensure_exercises(full_path)
+
+        tree_path = os.path.join(self.root, "tree.json")
+        dump_json(tree_path, self.tree, exist_ok=True, override=True)
+        return self.tree
+
+    def sort_dir_list(self, dirs):
+        result = [self.extract_node_env(dir) for dir in dirs]
+        result.sort(key=lambda item: item[0])
+        return result
+
+    def load_levels(self, root_node):
+        levels = []
+        for level in os.listdir(self.root):
+            if not os.path.isdir(level):
+                continue
+            level_path = os.path.join(self.root, level)
+            num, config = self.load_level_node(level_path)
+            levels.append((num, config))
+
+        levels = self.resort_children(self.root, levels)
+        root_node["children"] = [item[1] for item in levels]
+        return root_node
+
+    def load_level_node(self, level_path):
+        config = self.ensure_level_config(level_path)
+        num, name = self.extract_node_env(level_path)
+
+        result = {
+            name: {
+                "node_id": config["node_id"],
+                "keywords": config["keywords"],
+                "children": [],
+            }
+        }
+
+        return num, result
+
+    def load_chapters(self, base, level_node):
+        chapters = []
+        for name in os.listdir(base):
+            full_name = os.path.join(base, name)
+            if os.path.isdir(full_name):
+                num, chapter = self.load_chapter_node(full_name)
+                chapters.append((num, chapter))
+
+        chapters = self.resort_children(base, chapters)
+        level_node["children"] = [item[1] for item in chapters]
+        return level_node
+
+    def load_sections(self, base, chapter_node):
+        sections = []
+        for name in os.listdir(base):
+            full_name = os.path.join(base, name)
+            if os.path.isdir(full_name):
+                num, section = self.load_section_node(full_name)
+                sections.append((num, section))
+
+        sections = self.resort_children(base, sections)
+        chapter_node["children"] = [item[1] for item in sections]
+        return chapter_node
+
+    def resort_children(self, base, children):
+        children.sort(key=lambda item: item[0])
+        for index, [number, element] in enumerate(children):
+            title = list(element.keys())[0]
+            origin = os.path.join(base, f"{number}.{title}")
+            posted = os.path.join(base, f"{index + 1}.{title}")
+            if origin != posted:
+                self.logger.info(f"rename [{origin}] to [{posted}]")
+                os.rename(origin, posted)
+        return children
+
+    def ensure_chapters(self):
+        for subdir in os.listdir(self.root):
+            self.ensure_level_config(subdir)
+
+    def load_root(self):
+        config_path = os.path.join(self.root, "config.json")
+        if not os.path.exists(config_path):
+            config = {
+                "tree_name": self.name,
+                "keywords": [],
+                "node_id": self.gen_node_id(),
+            }
+            dump_json(config_path, config, exist_ok=True, override=True)
+        else:
+            config = load_json(config_path)
+            flag, result = self.ensure_node_id(config)
+            if flag:
+                dump_json(config_path, result, exist_ok=True, override=True)
+
+        return config
+
+    def ensure_level_config(self, path):
+        config_path = os.path.join(path, "config.json")
+        if not os.path.exists(config_path):
+            config = {
+                "node_id": self.gen_node_id()
+            }
+            dump_json(config_path, config, exist_ok=True, override=True)
+        else:
+            config = load_json(config_path)
+            flag, result = self.ensure_node_id(config)
+            if flag:
+                dump_json(config_path, config, exist_ok=True, override=True)
+        return config
+
+    def ensure_chapter_config(self, path):
+        config_path = os.path.join(path, "config.json")
+        if not os.path.exists(config_path):
+            config = {
+                "node_id": self.gen_node_id(),
+                "keywords": []
+            }
+            dump_json(config_path, config, exist_ok=True, override=True)
+        else:
+            config = load_json(config_path)
+            flag, result = self.ensure_node_id(config)
+            if flag:
+                dump_json(config_path, config, exist_ok=True, override=True)
+        return config
+
+    def ensure_section_config(self, path):
+        config_path = os.path.join(path, "config.json")
+        if not os.path.exists(config_path):
+            config = {
+                "node_id": self.gen_node_id(),
+                "keywords": [],
+                "children": [],
+                "export": []
+            }
+            dump_json(config_path, config, exist_ok=True, override=True)
+        else:
+            config = load_json(config_path)
+            flag, result = self.ensure_node_id(config)
+            if flag:
+                dump_json(config_path, result, exist_ok=True, override=True)
+        return config
+
+    def ensure_node_id(self, config):
+        flag = False
+        if "node_id" not in config or \
+                not config["node_id"].startswith(f"{self.name}-") or \
+                config["node_id"] in id_set:
+            new_id = self.gen_node_id()
+            id_set.add(new_id)
+            config["node_id"] = new_id
+            flag = True
+
+        for child in config.get("children", []):
+            child_node = list(child.values())[0]
+            f, _ = self.ensure_node_id(child_node)
+            flag = flag or f
+
+        return flag, config
+
+    def gen_node_id(self):
+        return f"{self.name}-{uuid.uuid4().hex}"
+
+    def extract_node_env(self, path):
+        try:
+            _, dir = os.path.split(path)
+            self.logger.info(path)
+            number, title = dir.split(".", 1)
+            return int(number), title
+        except Exception as error:
+            self.logger.error(f"目录 [{path}] 解析失败，结构不合法，可能是缺少序号")
+            # sys.exit(1)
+            raise error
+
+    def load_chapter_node(self, full_name):
+        config = self.ensure_chapter_config(full_name)
+        num, name = self.extract_node_env(full_name)
+        result = {
+            name: {
+                "node_id": config["node_id"],
+                "keywords": config["keywords"],
+                "children": [],
+            }
+        }
+        return num, result
+
+    def load_section_node(self, full_name):
+        config = self.ensure_section_config(full_name)
+        num, name = self.extract_node_env(full_name)
+        result = {
+            name: {
+                "node_id": config["node_id"],
+                "keywords": config["keywords"],
+                "children": config.get("children", [])
+            }
+        }
+        # if "children" in config:
+        #     result["children"] = config["children"]
+        return num, result
+
+    def ensure_exercises(self, section_path):
+        config = self.ensure_section_config(section_path)
+        flag = False
+        for e in os.listdir(section_path):
+            base, ext = os.path.splitext(e)
+            _, source = os.path.split(e)
+            if ext != ".md":
+                continue
+            mfile = base + ".json"
+            meta_path = os.path.join(section_path, mfile)
+            self.ensure_exercises_meta(meta_path, source)
+            export = config.get("export", [])
+            if mfile not in export and self.name != "algorithm":
+                export.append(mfile)
+                flag = True
+                config["export"] = export
+
+        if flag:
+            dump_json(os.path.join(section_path, "config.json"), config, True, True)
+
+        for e in config.get("export", []):
+            full_name = os.path.join(section_path, e)
+            exercise = load_json(full_name)
+            if not exercise.get("exercise_id") or exercise.get("exercise_id") in id_set:
+                eid = uuid.uuid4().hex
+                exercise["exercise_id"] = eid
+                dump_json(full_name, exercise, True, True)
+            else:
+                id_set.add(exercise["exercise_id"])
+
+    def ensure_exercises_meta(self, meta_path, source):
+        _, mfile = os.path.split(meta_path)
+        meta = None
+        if os.path.exists(meta_path):
+            content = read_text(meta_path)
+            if content:
+                meta = json.loads(content)
+                if "exercise_id" not in meta:
+                    meta["exercise_id"] = uuid.uuid4().hex
+                if "notebook_enable" not in meta:
+                    meta["notebook_enable"] = self.default_notebook()
+                if "source" not in meta:
+                    meta["source"] = source
+                if "author" not in meta:
+                    meta["author"] = user_name()
+                if "type" not in meta:
+                    meta["type"] = "code_options"
+            if meta is None:
+                meta = {
+                    "type": "code_options",
+                    "author": user_name(),
+                    "source": source,
+                    "notebook_enable": self.default_notebook(),
+                    "exercise_id": uuid.uuid4().hex
+                }
+        dump_json(meta_path, meta, True, True)
+
+    def default_notebook(self):
+        if self.name in ["python", "java", "c"]:
+            return True
+        else:
+            return False
+
+    def check_section_keywords(self, full_path):
+        config = self.ensure_section_config(full_path)
+        if not config.get("keywords", []):
+            self.logger.error(f"节点 [{full_path}] 的关键字为空，请修改配置文件写入关键字")
+            sys.exit(1)

test/exercises/markdown.py

+def math_processor(context):
+    """ math(str)->str
+对文本内容预处理，将公式标记为前端可展示的 html。
+    """
+    md = context
+    new_md = []
+    math_ctx = {
+        "enter": False,
+        "chars": []
+    }
+
+    count = len(md)
+    i = 0
+    while i < count:
+        c = md[i]
+        if c == '$':
+            if math_ctx['enter']:
+                j = 0
+                chars = math_ctx['chars']
+                length = len(chars)
+                while j < length:
+                    cc = chars[j]
+                    if cc == '_':
+                        next_c = chars[j + 1]
+                        if next_c == '{':
+                            subs = []
+                            cursor = 2
+                            next_c = chars[j + cursor]
+                            while next_c != '}':
+                                subs.append(next_c)
+                                cursor += 1
+                                next_c = chars[j + cursor]
+
+                            sub = ''.join(subs)
+                            new_md.append(f'<sub>{sub}</sub>')
+                            j += cursor
+                        else:
+                            new_md.append(f'<sub>{next_c}</sub>')
+                            j += 1
+                    elif cc == '^':
+                        next_c = chars[j + 1]
+                        if next_c == '{':
+                            subs = []
+                            cursor = 2
+                            next_c = chars[j + cursor]
+                            while next_c != '}':
+                                subs.append(next_c)
+                                cursor += 1
+                                next_c = chars[j + cursor]
+
+                            sub = ''.join(subs)
+                            new_md.append(f'<sup>{sub}</sup>')
+                            j += cursor
+                        else:
+                            new_md.append(f'<sup>{next_c}</sup>')
+                            j += 1
+                    else:
+                        new_md.append(cc)
+                    j += 1
+
+                math_ctx['enter'] = False
+                math_ctx['chars'] = []
+            else:
+                math_ctx['enter'] = True
+                math_ctx['chars'] = []
+        else:
+            if math_ctx['enter']:
+                math_ctx['chars'].append(c)
+            else:
+                new_md.append(c)
+        i += 1
+    return "".join(new_md)