ruamel.yaml | 易学教程

merge two yaml files in python

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问题 I have two yaml files as mentioned below test1.yaml resources: server_group_1: type: OS::Nova::ServerGroup properties: name: { get_param: [server_groups, 5] } policies: [ { get_param: [server_group_types, 5] } ] server_group_2: type: OS::Nova::ServerGroup properties: name: { get_param: [server_groups, 8] } policies: [ { get_param: [server_group_types, 8] } ] output: check_1: description: Name of the instance value: { get_attr: [check_1, vname] } test2.yaml resources: server_group_4: type: OS:

Python Import error on installing ruamel.yaml in custom directory

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问题 I am using python 2.7.13 and I am facing problems importing ruamel.yaml when I install it in a custom directory. **ImportError: No module named ruamel.yaml** The command used is as follows: pip install --target=Z:\XYZ\globalpacks ruamel.yaml I have added this custom directory to PYTHONPATH env variable and also have a .pth file in this location with the following lines Z:\XYZ\globalpacks\anotherApp Z:\XYZ\globalpacks\ruamel There is another app installed similarly with the above settings and

Loading and dumping multiple yaml files with ruamel.yaml (python)

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问题 Using python 2 (atm) and ruamel.yaml 0.13.14 (RedHat EPEL) I'm currently writing some code to load yaml definitions, but they are split up in multiple files. The user-editable part contains eg. users: xxxx1: timestamp: '2018-10-22 11:38:28.541810' << : *userdefaults xxxx2: << : *userdefaults timestamp: '2018-10-22 11:38:28.541810' the defaults are stored in another file, which is not editable: userdefaults: &userdefaults # Default values for user settings fileCountQuota: 1000 diskSizeQuota:

How can I add a blank line before some data using Ruamel.yaml

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问题 I can't seem to figure out how I can add a blank line between data using Ruamel.yaml. Suppose I have data: --- a: 1 b: 2 I need to add to this so that I will have: --- a: 1 b: 2 c: 3 I understand that the blank line is implemented as a CommentToken: Comment(comment=None, items={'data': [None, None, CommentToken(value=u'\n\n'), None], 'b': [None, None, CommentToken(value=u'\n\n'), None]}) What I don't know is how to manipulate that structure. 回答1: That Comment object is not from the input that

Declare data type to ruamel.yaml so that it can represen/serialize it?

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问题 I am using a function from a python library which returns an object with a specific data type. I would like to serialize that object to a yaml file and I would like to use ruamel.yaml. The problem is that ruamel.yaml does not know how to serialize the specific data type that the function returns and throws an exception: RepresenterError: cannot represent an object: <...> The question is how to "declare" the data type to ruamel.yaml so that it knows how to handle it. Note: I can't / I don't

ruamel.yaml equivalent of sort_keys?

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问题 I'm trying to dump a Python dict to a YAML file using ruamel.yaml . I'm familiar with the json module's interface, where pretty-printing a dict is as simple as import json with open('outfile.json', 'w') as f: json.dump(mydict, f, indent=4, sort_keys=True) With ruamel.yaml , I've gotten as far as import ruamel.yaml with open('outfile.yaml', 'w') as f: ruamel.yaml.round_trip_dump(mydict, f, indent=2) but it doesn't seem to support the sort_keys option. ruamel.yaml also doesn't seem to have any

How can I get comments from a YAML file using ruamel.yaml in Python?

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问题 I'd like to get the comment strings from a YAML file I loaded using ruamel.yaml . The project documentation lacks an API reference and I can't find a relevant example. What's the right way to access the comments? import ruamel.yaml yaml = """\ %YAML 1.2 --- # C1 a: # C2 # C3 # C4 b: 1 # C5 c: # A comment here will not be parsed properly by ruamel.yaml v0.11.14 - abc # C6 - xyz # C7 # C8 # C9 """ loaded = ruamel.yaml.round_trip_load(yaml) # Now what? 回答1: The library author comments on this in

How can I add a comment to a YAML file in Python

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问题 I am writing a YAML file using https://pypi.python.org/pypi/ruamel.yaml The code is like this: import ruamel.yaml from ruamel.yaml.comments import CommentedSeq d = {} for m in ['B1', 'B2', 'B3']: d2 = {} for f in ['A1', 'A2', 'A3']: d2[f] = CommentedSeq(['test', 'test2']) if f != 'A2': d2[f].fa.set_flow_style() d[m] = d2 with open('test.yml', "w") as f: ruamel.yaml.dump( d, f, Dumper=ruamel.yaml.RoundTripDumper, default_flow_style=False, width=50, indent=8) I just want to add comment at the

How to dump YAML with explicit references?

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Recursive references work great in ruamel.yaml or pyyaml : $ ruamel.yaml.dump(ruamel.yaml.load('&A [ *A ]')) '&id001 - *id001' However it (obviously) does not work on normal references: $ ruamel.yaml.dump(ruamel.yaml.load("foo: &foo { a: 42 }\nbar: { <<: *foo }")) bar: {a: 42} foo: {a: 42} I would like is to explicitly create a reference: data = {} data['foo'] = {'foo': {'a': 42}} data['bar'] = { '<<': data['foo'], 'b': 43 } $ ruamel.yaml.dump(data, magic=True) foo: &foo a: 42 bar: <<: *foo b: 43 This will be very useful to generate YAML output of large data structures that have lots of common

how to keep null value in yaml file while dumping though ruamel.yaml

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问题 I have YAML file site.yaml : Kvm_BLOCK: ip_address: 10.X.X.X property: null server_type: zone loaded and then dumped with: ruamel.yaml.dump(site_yaml, new_file, Dumper=ruamel.yaml.RoundTripDumper) it becomes Kvm_BLOCK: ip_address: 10.X.X.X property: server_type: zone how to retain this null value in property block 回答1: The null value in YAML 1.2 (constructed as Python's None ) can be represented as null , Null , NULL and ~ , as specified here. Additionally: Nodes with empty content are