How to print the first key by searching from nested yaml using python

I have below nested yaml file, I want extract only NN41_R11.

devices:

  NN41_R11:

    connections:

      defaults:

        a:

          ip: 

          port: 

          protocol: telnet

        class: 

    type: IOS

testbed:

  name:

I am new to yaml parsing using python, below is the code which i tried to pseudo code, but its printing the entire yaml file.

import yaml

stream = open('/tmp/testbed1.yaml','r')

data = yaml.load(stream)

print data.get('devices')

asked Feb 22 '18 at 15:46

Vadiraj

204

but its printing the entire yaml file. - It prints a subtree corresponded to "devices" node. If you want to get the first key of that subtree, use list(subtree.keys())[0] or any other receipt from that question: stackoverflow.com/questions/30362391/…. Note, that YAML standard doesn't define order of the keys, so the first key extracted from subtree needn't to be the first key in the yaml file. However, there are some ways for remain that order: stackoverflow.com/questions/13297744/…

– Tsyvarev
Feb 22 '18 at 15:57

add a comment |

I have below nested yaml file, I want extract only NN41_R11.

devices:

  NN41_R11:

    connections:

      defaults:

        a:

          ip: 

          port: 

          protocol: telnet

        class: 

    type: IOS

testbed:

  name:

I am new to yaml parsing using python, below is the code which i tried to pseudo code, but its printing the entire yaml file.

import yaml

stream = open('/tmp/testbed1.yaml','r')

data = yaml.load(stream)

print data.get('devices')

asked Feb 22 '18 at 15:46

Vadiraj

204

but its printing the entire yaml file. - It prints a subtree corresponded to "devices" node. If you want to get the first key of that subtree, use list(subtree.keys())[0] or any other receipt from that question: stackoverflow.com/questions/30362391/…. Note, that YAML standard doesn't define order of the keys, so the first key extracted from subtree needn't to be the first key in the yaml file. However, there are some ways for remain that order: stackoverflow.com/questions/13297744/…

– Tsyvarev
Feb 22 '18 at 15:57

add a comment |

I have below nested yaml file, I want extract only NN41_R11.

devices:

  NN41_R11:

    connections:

      defaults:

        a:

          ip: 

          port: 

          protocol: telnet

        class: 

    type: IOS

testbed:

  name:

I am new to yaml parsing using python, below is the code which i tried to pseudo code, but its printing the entire yaml file.

import yaml

stream = open('/tmp/testbed1.yaml','r')

data = yaml.load(stream)

print data.get('devices')

asked Feb 22 '18 at 15:46

Vadiraj

204

I have below nested yaml file, I want extract only NN41_R11.

devices:

  NN41_R11:

    connections:

      defaults:

        a:

          ip: 

          port: 

          protocol: telnet

        class: 

    type: IOS

testbed:

  name:

I am new to yaml parsing using python, below is the code which i tried to pseudo code, but its printing the entire yaml file.

import yaml

stream = open('/tmp/testbed1.yaml','r')

data = yaml.load(stream)

print data.get('devices')

python-3.x python-2.7 parsing yaml

asked Feb 22 '18 at 15:46

Vadiraj

204

asked Feb 22 '18 at 15:46

Vadiraj

204

asked Feb 22 '18 at 15:46

Vadiraj

204

asked Feb 22 '18 at 15:46

Vadiraj

204

asked Feb 22 '18 at 15:46

Vadiraj

204

but its printing the entire yaml file. - It prints a subtree corresponded to "devices" node. If you want to get the first key of that subtree, use list(subtree.keys())[0] or any other receipt from that question: stackoverflow.com/questions/30362391/…. Note, that YAML standard doesn't define order of the keys, so the first key extracted from subtree needn't to be the first key in the yaml file. However, there are some ways for remain that order: stackoverflow.com/questions/13297744/…

– Tsyvarev
Feb 22 '18 at 15:57

add a comment |

but its printing the entire yaml file. - It prints a subtree corresponded to "devices" node. If you want to get the first key of that subtree, use list(subtree.keys())[0] or any other receipt from that question: stackoverflow.com/questions/30362391/…. Note, that YAML standard doesn't define order of the keys, so the first key extracted from subtree needn't to be the first key in the yaml file. However, there are some ways for remain that order: stackoverflow.com/questions/13297744/…

– Tsyvarev
Feb 22 '18 at 15:57

but its printing the entire yaml file. - It prints a subtree corresponded to "devices" node. If you want to get the first key of that subtree, use list(subtree.keys())[0] or any other receipt from that question: stackoverflow.com/questions/30362391/…. Note, that YAML standard doesn't define order of the keys, so the first key extracted from subtree needn't to be the first key in the yaml file. However, there are some ways for remain that order: stackoverflow.com/questions/13297744/…

– Tsyvarev
Feb 22 '18 at 15:57

add a comment |

1 Answer
1

active

oldest

votes

First you need to load the yaml file into a python nested dictionary object (key/value pairs). After this you're able to access the values of the dictionary with the dict.get('key') method.

# Read yaml file into nested dictionary

import yaml

fileName = '/tmp/testbed1.yaml'

with open(fileName, 'r') as yamlFile:

    data = yaml.load(yamlFile)



# Get target value

target = data.get('devices').get('NN41_R11')



# Pretty print nested dictionary (or simply print)

__import__('pprint').pprint(target)

edited Nov 14 '18 at 17:29

answered Nov 14 '18 at 16:07

MikeBoiko

your answer could be better if you add some explanation. In this way you grant your answer to be useful to all levels of knowledgement

– DaFois
Nov 14 '18 at 16:30

Thanks for the feedback, I will do that.

– MikeBoiko
Nov 14 '18 at 17:28

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

First you need to load the yaml file into a python nested dictionary object (key/value pairs). After this you're able to access the values of the dictionary with the dict.get('key') method.

# Read yaml file into nested dictionary

import yaml

fileName = '/tmp/testbed1.yaml'

with open(fileName, 'r') as yamlFile:

    data = yaml.load(yamlFile)



# Get target value

target = data.get('devices').get('NN41_R11')



# Pretty print nested dictionary (or simply print)

__import__('pprint').pprint(target)

edited Nov 14 '18 at 17:29

answered Nov 14 '18 at 16:07

MikeBoiko

your answer could be better if you add some explanation. In this way you grant your answer to be useful to all levels of knowledgement

– DaFois
Nov 14 '18 at 16:30

Thanks for the feedback, I will do that.

– MikeBoiko
Nov 14 '18 at 17:28

add a comment |

First you need to load the yaml file into a python nested dictionary object (key/value pairs). After this you're able to access the values of the dictionary with the dict.get('key') method.

# Read yaml file into nested dictionary

import yaml

fileName = '/tmp/testbed1.yaml'

with open(fileName, 'r') as yamlFile:

    data = yaml.load(yamlFile)



# Get target value

target = data.get('devices').get('NN41_R11')



# Pretty print nested dictionary (or simply print)

__import__('pprint').pprint(target)

edited Nov 14 '18 at 17:29

answered Nov 14 '18 at 16:07

MikeBoiko

your answer could be better if you add some explanation. In this way you grant your answer to be useful to all levels of knowledgement

– DaFois
Nov 14 '18 at 16:30

Thanks for the feedback, I will do that.

– MikeBoiko
Nov 14 '18 at 17:28

add a comment |

First you need to load the yaml file into a python nested dictionary object (key/value pairs). After this you're able to access the values of the dictionary with the dict.get('key') method.

# Read yaml file into nested dictionary

import yaml

fileName = '/tmp/testbed1.yaml'

with open(fileName, 'r') as yamlFile:

    data = yaml.load(yamlFile)



# Get target value

target = data.get('devices').get('NN41_R11')



# Pretty print nested dictionary (or simply print)

__import__('pprint').pprint(target)

edited Nov 14 '18 at 17:29

answered Nov 14 '18 at 16:07

MikeBoiko

First you need to load the yaml file into a python nested dictionary object (key/value pairs). After this you're able to access the values of the dictionary with the dict.get('key') method.

# Read yaml file into nested dictionary

import yaml

fileName = '/tmp/testbed1.yaml'

with open(fileName, 'r') as yamlFile:

    data = yaml.load(yamlFile)



# Get target value

target = data.get('devices').get('NN41_R11')



# Pretty print nested dictionary (or simply print)

__import__('pprint').pprint(target)

edited Nov 14 '18 at 17:29

answered Nov 14 '18 at 16:07

MikeBoiko

edited Nov 14 '18 at 17:29

answered Nov 14 '18 at 16:07

MikeBoiko

answered Nov 14 '18 at 16:07

MikeBoiko

answered Nov 14 '18 at 16:07

MikeBoiko

your answer could be better if you add some explanation. In this way you grant your answer to be useful to all levels of knowledgement

– DaFois
Nov 14 '18 at 16:30

Thanks for the feedback, I will do that.

– MikeBoiko
Nov 14 '18 at 17:28

add a comment |

your answer could be better if you add some explanation. In this way you grant your answer to be useful to all levels of knowledgement

– DaFois
Nov 14 '18 at 16:30

Thanks for the feedback, I will do that.

– MikeBoiko
Nov 14 '18 at 17:28

your answer could be better if you add some explanation. In this way you grant your answer to be useful to all levels of knowledgement

– DaFois
Nov 14 '18 at 16:30

Thanks for the feedback, I will do that.

– MikeBoiko
Nov 14 '18 at 17:28

add a comment |

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