我如何用Python解析'Front Matter'

Question

我似乎无法解释如何用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,我不断收到错误 ---

Answer 1

我知道这是一个老问题,但我只是遇到了同样的问题并且使用了python-frontmatter.以下是向Front事件添加新变量的示例:

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:如何用python解析frontmatter

Answer 2

启动---新文档，这会导致您的第二个文档为空，并且doc用于None第二部分。您遍历了键、值对，就doc好像 everydoc是 Pythondict或等效类型一样，但事实None并非如此，因此您应该在循环内测试它（当然有多种方法可以做到这一点，以及如果doc不是一个dict）：

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