如何解析'；前沿问题'；用Python

我似乎找不到任何关于如何用Python解析“Front Matter”的例子。我有以下资料：

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

我使用的代码如下：

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

--

--

启动新文档，导致您的第二个文档为空，第二部分的

doc

为

None

，因此我不断出现错误。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，所以您应该在循环中测试这一点（当然有多种方法可以做到这一点，如果

doc

不是

dict

，该怎么做）：

---

我知道这是一个老问题，但我只是面对同样的问题，并使用了

pythonfrontment

。下面是一个将新变量添加到前端的示例：

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：

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()