Python: Read information from .yaml

I set up a .yaml file that contains meta data for my measurement points. In this .yaml file I used nested lists and dictionaries that contain the informations, e.g.:

stations:

  - XXXX:

      statnr: 11111

      name: NAME

      name_csv: CSV

      name_snowpack: NAME_SHORT

      lat: 11.11111

      lon: 11.22222

      alt: 1111

      type: TYPE

      operator: OPERATOR

      param: 

        - x1

        - x2

        - x3

        - x4

        - x5

  - YYYY:

      statnr: 22222

      name: NAME2

      name_csv: CSV2

      name_snowpack: NAME_SHORT2

      lat: 22.22222

      lon: 22.33333

      alt: 2222

      type: TYPE2

      operator: OPERATOR2

      param: 

        - y1

        - y2

        - y3

        - y4

        - y5

Next I tried to read specific entries from that file.

import yaml

with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    print(stations[0])

This works and prints out all information about list entry 'XXXX' but if I want to only retrieve the information about the operator like I would do with a python dictionary:

print(stations[0]['operator'])

I get a: KeyError:'operator'.

So how can I address this entry or maybe entries even one level below that?
Thanks for helping!

asked Nov 21 '18 at 13:29

Vroni

435

add a comment |

I set up a .yaml file that contains meta data for my measurement points. In this .yaml file I used nested lists and dictionaries that contain the informations, e.g.:

stations:

  - XXXX:

      statnr: 11111

      name: NAME

      name_csv: CSV

      name_snowpack: NAME_SHORT

      lat: 11.11111

      lon: 11.22222

      alt: 1111

      type: TYPE

      operator: OPERATOR

      param: 

        - x1

        - x2

        - x3

        - x4

        - x5

  - YYYY:

      statnr: 22222

      name: NAME2

      name_csv: CSV2

      name_snowpack: NAME_SHORT2

      lat: 22.22222

      lon: 22.33333

      alt: 2222

      type: TYPE2

      operator: OPERATOR2

      param: 

        - y1

        - y2

        - y3

        - y4

        - y5

Next I tried to read specific entries from that file.

import yaml

with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    print(stations[0])

This works and prints out all information about list entry 'XXXX' but if I want to only retrieve the information about the operator like I would do with a python dictionary:

print(stations[0]['operator'])

I get a: KeyError:'operator'.

So how can I address this entry or maybe entries even one level below that?
Thanks for helping!

asked Nov 21 '18 at 13:29

Vroni

435

add a comment |

I set up a .yaml file that contains meta data for my measurement points. In this .yaml file I used nested lists and dictionaries that contain the informations, e.g.:

stations:

  - XXXX:

      statnr: 11111

      name: NAME

      name_csv: CSV

      name_snowpack: NAME_SHORT

      lat: 11.11111

      lon: 11.22222

      alt: 1111

      type: TYPE

      operator: OPERATOR

      param: 

        - x1

        - x2

        - x3

        - x4

        - x5

  - YYYY:

      statnr: 22222

      name: NAME2

      name_csv: CSV2

      name_snowpack: NAME_SHORT2

      lat: 22.22222

      lon: 22.33333

      alt: 2222

      type: TYPE2

      operator: OPERATOR2

      param: 

        - y1

        - y2

        - y3

        - y4

        - y5

Next I tried to read specific entries from that file.

import yaml

with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    print(stations[0])

This works and prints out all information about list entry 'XXXX' but if I want to only retrieve the information about the operator like I would do with a python dictionary:

print(stations[0]['operator'])

I get a: KeyError:'operator'.

So how can I address this entry or maybe entries even one level below that?
Thanks for helping!

asked Nov 21 '18 at 13:29

Vroni

435

I set up a .yaml file that contains meta data for my measurement points. In this .yaml file I used nested lists and dictionaries that contain the informations, e.g.:

stations:

  - XXXX:

      statnr: 11111

      name: NAME

      name_csv: CSV

      name_snowpack: NAME_SHORT

      lat: 11.11111

      lon: 11.22222

      alt: 1111

      type: TYPE

      operator: OPERATOR

      param: 

        - x1

        - x2

        - x3

        - x4

        - x5

  - YYYY:

      statnr: 22222

      name: NAME2

      name_csv: CSV2

      name_snowpack: NAME_SHORT2

      lat: 22.22222

      lon: 22.33333

      alt: 2222

      type: TYPE2

      operator: OPERATOR2

      param: 

        - y1

        - y2

        - y3

        - y4

        - y5

Next I tried to read specific entries from that file.

import yaml

with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    print(stations[0])

This works and prints out all information about list entry 'XXXX' but if I want to only retrieve the information about the operator like I would do with a python dictionary:

print(stations[0]['operator'])

I get a: KeyError:'operator'.

So how can I address this entry or maybe entries even one level below that?
Thanks for helping!

yaml python-3.7 pyyaml

asked Nov 21 '18 at 13:29

Vroni

435

asked Nov 21 '18 at 13:29

Vroni

435

asked Nov 21 '18 at 13:29

Vroni

435

asked Nov 21 '18 at 13:29

Vroni

435

asked Nov 21 '18 at 13:29

Vroni

435

add a comment |

1 Answer
1

active

oldest

votes

Found the answer to the question myself. Obviously didn't try that thoroughly enough before..

Instead of having a list of stations in my stations.yaml like above:

stations: 

  - XXXX:

     statnr:1111

     ....

  - YYYY:

     statnr:2222

     ....

I use another dictionary:

stations: 

  XXXX:

    statnr:1111

    param:

      -x1

      -x2

    ....

  YYYY:

    statnr:2222

    param:

      -x1

      -x2

    ....

In this way I can use:

import yaml



with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    txt = stations['XXXX']['param'][0]   

    print(txt)

and get the result

x1

which is exactly what I was looking for.

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

answered Nov 21 '18 at 13:40

Vroni

435

add a comment |

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1 Answer
1

active

oldest

votes

1 Answer
1

active

oldest

votes

Found the answer to the question myself. Obviously didn't try that thoroughly enough before..

Instead of having a list of stations in my stations.yaml like above:

stations: 

  - XXXX:

     statnr:1111

     ....

  - YYYY:

     statnr:2222

     ....

I use another dictionary:

stations: 

  XXXX:

    statnr:1111

    param:

      -x1

      -x2

    ....

  YYYY:

    statnr:2222

    param:

      -x1

      -x2

    ....

In this way I can use:

import yaml



with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    txt = stations['XXXX']['param'][0]   

    print(txt)

and get the result

x1

which is exactly what I was looking for.

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

answered Nov 21 '18 at 13:40

Vroni

435

add a comment |

Found the answer to the question myself. Obviously didn't try that thoroughly enough before..

Instead of having a list of stations in my stations.yaml like above:

stations: 

  - XXXX:

     statnr:1111

     ....

  - YYYY:

     statnr:2222

     ....

I use another dictionary:

stations: 

  XXXX:

    statnr:1111

    param:

      -x1

      -x2

    ....

  YYYY:

    statnr:2222

    param:

      -x1

      -x2

    ....

In this way I can use:

import yaml



with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    txt = stations['XXXX']['param'][0]   

    print(txt)

and get the result

x1

which is exactly what I was looking for.

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

answered Nov 21 '18 at 13:40

Vroni

435

add a comment |

Found the answer to the question myself. Obviously didn't try that thoroughly enough before..

Instead of having a list of stations in my stations.yaml like above:

stations: 

  - XXXX:

     statnr:1111

     ....

  - YYYY:

     statnr:2222

     ....

I use another dictionary:

stations: 

  XXXX:

    statnr:1111

    param:

      -x1

      -x2

    ....

  YYYY:

    statnr:2222

    param:

      -x1

      -x2

    ....

In this way I can use:

import yaml



with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    txt = stations['XXXX']['param'][0]   

    print(txt)

and get the result

x1

which is exactly what I was looking for.

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

answered Nov 21 '18 at 13:40

Vroni

435

Found the answer to the question myself. Obviously didn't try that thoroughly enough before..

Instead of having a list of stations in my stations.yaml like above:

stations: 

  - XXXX:

     statnr:1111

     ....

  - YYYY:

     statnr:2222

     ....

I use another dictionary:

stations: 

  XXXX:

    statnr:1111

    param:

      -x1

      -x2

    ....

  YYYY:

    statnr:2222

    param:

      -x1

      -x2

    ....

In this way I can use:

import yaml



with open('./config/stations.yaml','r') as file:

    meta = yaml.load(file)

    stations = meta['stations'] 

    txt = stations['XXXX']['param'][0]   

    print(txt)

and get the result

x1

which is exactly what I was looking for.

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

answered Nov 21 '18 at 13:40

Vroni

435

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

edited Nov 21 '18 at 14:20

Anthon

31.4k1796150

answered Nov 21 '18 at 13:40

Vroni

435

answered Nov 21 '18 at 13:40

Vroni

435

answered Nov 21 '18 at 13:40

Vroni

435

add a comment |

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