Question

我似乎无法解释如何使用Python解析'Front Matter'。我有以下内容：

---
name: David
password: dwewwsadas
email: david@domain.com
websiteName: Website Name
websitePrefix: websiteprefix
websiteDomain: domain.com
action: create
---

我正在使用以下代码：

listing = os.listdir(path)
for infile in listing:
    stream = open(os.path.join(path, infile), 'r')
    docs = yaml.load_all(stream)
    for doc in docs:
        for k,v in doc.items():
            print k, "->", v
    print "\n",

由于第二组---

，我一直收到错误

Answer 1

我知道这是一个老问题，但我遇到了同样的问题并使用了python-frontmatter。以下是向前端内容添加新变量的示例：

import frontmatter
import io
from os.path import basename, splitext
import glob

# Where are the files to modify
path = "en/*.markdown"

# Loop through all files
for fname in glob.glob(path):
    with io.open(fname, 'r') as f:
        # Parse file's front matter
        post = frontmatter.load(f)
        if post.get('author') == None:
            post['author'] = "alex"
            # Save the modified file
            newfile = io.open(fname, 'w', encoding='utf8')
            frontmatter.dump(post, newfile)
            newfile.close()

来源：How to parse frontmatter with python

Answer 2

---启动新文档，导致第二个文档为空，第二部分doc为None。您遍历doc的键值对，就好像每个doc都是Python dict或等效类型，但None不是，所以您应该测试在你的循环中（当然有多种方法可以做到这一点，以及doc不是dict时该怎么做）：

....
for doc in yaml.load_all(stream):
    if hasattr(doc, 'items'):
        for k, v in doc.items():
            print k, "->", v
    else:
        print doc

我如何用Python解析'Front Matter'

2 个答案: