我有一个看起来像
的yaml文件---
level_1: "test"
level_2: 'NetApp, SOFS, ZFS Creation'
request: 341570
---
level_1: "test"
level_2: 'NetApp, SOFS, ZFS Creation'
request: 341569
---
level_1: "test"
level_2: 'NetApp, SOFS, ZFS Creation'
request: 341568
我能够在Perl中使用YAML正确读取此内容,但在使用YAML的python中无法正确读取。它失败并出现错误:
预计流中的单个文档
程序:
import yaml
stram = open("test", "r")
print yaml.load(stram)
错误:
Traceback (most recent call last):
File "abcd", line 4, in <module>
print yaml.load(stram)
File "/usr/local/pkgs/python-2.6.5/lib/python2.6/site-packages/yaml/__init__.py", line 58, in load
return loader.get_single_data()
File "/usr/local/pkgs/python-2.6.5/lib/python2.6/site-packages/yaml/constructor.py", line 42, in get_single_data
node = self.get_single_node()
File "/usr/local/pkgs/python-2.6.5/lib/python2.6/site-packages/yaml/composer.py", line 43, in get_single_node
event.start_mark)
yaml.composer.ComposerError: expected a single document in the stream
in "test", line 2, column 1
but found another document
in "test", line 5, column 1
答案 0 :(得分:91)
yaml文档由---
分隔,如果任何流(例如文件)包含多个文档,则应使用yaml.load_all
函数而不是yaml.load
。代码:
import yaml
stream = open("test", "r")
docs = yaml.load_all(stream)
for doc in docs:
for k,v in doc.items():
print k, "->", v
print "\n",
导致问题中提供的输入文件:
request -> 341570
level_1 -> test
level_2 -> NetApp, SOFS, ZFS Creation
request -> 341569
level_1 -> test
level_2 -> NetApp, SOFS, ZFS Creation
request -> 341568
level_1 -> test
level_2 -> NetApp, SOFS, ZFS Creation