解析YAML时出现一个奇怪的错误：yaml.scanner.ScannerError: mapping values are not allowed here
根据YAML Lint，我试图读取的YAML文件是有效的
另一件奇怪的事情是，它在我的笔记本电脑(Arch Linux)上运行良好，但在服务器(Ubuntu)上运行不好。PyYAML版本在两台机器上都是相同的。
这是完整的YAML文件：pipeline:
- read:
input: /home/omnibrain/projects/company/data/data.csv
output: some_data
- filter:
input: some_data
filtername: latlng_filter
minlat: 32.5
maxlat: 32.9
minlng: -117.4
maxlng: -117.0
- enhance:
input: some_data
enhancername: geo_enhancer
fields: zip
- write:
input: some_data
writername: csv_writer
output_dir: /home/omnibrain/outputs
columns: [id, latitude, longitude, zip, networktype]
filename: example1 # the output filename
这是完整的堆栈跟踪：Traceback (most recent call last):
File "/usr/local/bin/someproject", line 9, in
load_entry_point('someproject==0.0.1', 'console_scripts', 'someproject')()
File "/usr/local/lib/python3.4/dist-packages/someproject-0.0.1-py3.4.egg/someproject/__init__.py", line 19, in main
pipeline.Pipeline(parser.parse_args().scriptfile).start()
File "/usr/local/lib/python3.4/dist-packages/someproject-0.0.1-py3.4.egg/someproject/pipeline/pipeline.py", line 20, in __init__
self._raw_pipeline = self._parse_yaml(yamlscript)
File "/usr/local/lib/python3.4/dist-packages/someproject-0.0.1-py3.4.egg/someproject/pipeline/pipeline.py", line 55, in _parse_yaml
data = yaml.load(yamlscript)
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/__init__.py", line 72, in load
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/constructor.py", line 35, in get_single_data
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 36, in get_single_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 55, in compose_document
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 84, in compose_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 133, in compose_mapping_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 82, in compose_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 111, in compose_sequence_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 84, in compose_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 133, in compose_mapping_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 84, in compose_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/composer.py", line 127, in compose_mapping_node
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/parser.py", line 98, in check_event
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/parser.py", line 428, in parse_block_mapping_key
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/scanner.py", line 116, in check_token
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/scanner.py", line 220, in fetch_more_tokens
File "/usr/local/lib/python3.4/dist-packages/PyYAML-3.11-py3.4-linux-x86_.egg/yaml/scanner.py", line 580, in fetch_value
yaml.scanner.ScannerError: mapping values are not allowed here
in "./test1.yaml", line 3, column 93
