当我转储到另一个文件时如何删除引号？

Question

我对 python（2 天）还很陌生，所以请多多包涵。我正在尝试将 yaml 从文件 readCsv.py 发送到 getData.yml 文件。我认为一切正常，但我收到了关于我从 readCsv.py 发送到 getData.tml 的导出 yaml 的报价。这是为什么？

这里是奇迹发生的地方，readCsv.py:

import csv
import pandas
import yaml

""" Reading whole csv file with panda library """
df = pandas.read_csv('chord-progressions.csv')

""" Read in csv, but easy read with pandas """
""" print(df) """

""" Convert csv to yml """
text = yaml.dump(
    df.to_dict(orient='records'),
    sort_keys=False, width=72, indent=4)

print(text)
""" Export the recently converted yml to getData.yml """
with open('getData.yml', 'w') as outfile:
    yaml.dump(text, outfile, default_flow_style=False)

我的 getData.yml 文件中的输出：

"-   1st chord: 4\n    2nd chord: 1\n    3rd chord: 5\n    4th chord: Alternative\n\
  \    Progression: .nan\n-   1st chord: 4\n    2nd chord: 1\n    3rd chord: 5\n \
  \   4th chord: Catchy\n    Progression: .nan\n-   1st chord: 1\n    2nd chord: 1\n\
  \    3rd chord: 1\n    4th chord: Didgeridoo\n    Progression: .nan\n-   1st chord:\
  \ 6\n    2nd chord: 4\n    3rd chord: 5\n    4th chord: Dreadful\n    Progression:\
  \ .nan\n-   1st chord: 6\n    2nd chord: 2\n    3rd chord: 5\n    4th chord: Dreadful\n\
  \    Progression: .nan\n-   1st chord: 6\n    2nd chord: 2\n    3rd chord: 4\n \
  \   4th chord: Endless\n    Progression: .nan\n-   1st chord: 3\n    2nd chord:\
  \ 4\n    3rd chord: 6\n    4th chord: Energetic\n    Progression: .nan\n-   1st\
  \ chord: 5\n    2nd chord: 1\n    3rd chord: 4\n    4th chord: Folk\n    Progression:\
  \ .nan\n-   1st chord: 6\n    2nd chord: 1\n    3rd chord: 4\n    4th chord: Folk\n\
  \    Progression: .nan\n-   1st chord: 5\n    2nd chord: 4\n    3rd chord: 3\n \
  \   4th chord: Flamenco\n    Progression: .nan\n-   1st chord: 5\n    2nd chord:\
  \ 6\n    3rd chord: 5\n    4th chord: Flamenco\n    Progression: .nan\n-   1st chord:\
  \ 4\n    2nd chord: 3\n    3rd chord: 6\n    4th chord: Grunge\n    Progression:\
  \ .nan\n-   1st chord: 5\n    2nd chord: 1\n    3rd chord: 6\n    4th chord: Jazz\n\
  \    Progression: .nan\n-   1st chord: 4\n    2nd chord: 5\n    3rd chord: 4\n \
  \   4th chord: Love\n    Progression: .nan\n-   1st chord: 4\n    2nd chord: 1\n\
  \    3rd chord: 5\n    4th chord: Memories\n    Progression: .nan\n-   1st chord:\
  \ 5\n    2nd chord: 6\n    3rd chord: 4\n    4th chord: Pop\n    Progression: .nan\n\
  -   1st chord: 6\n    2nd chord: 3\n    3rd chord: 7\n    4th chord: Pop\n    Progression:\
  \ .nan\n-   1st chord: 1\n    2nd chord: 4\n    3rd chord: 5\n    4th chord: Rebellious\n\
  \    Progression: .nan\n-   1st chord: 4\n    2nd chord: 5\n    3rd chord: 5\n \
  \   4th chord: Sad\n    Progression: .nan\n-   1st chord: 5\n    2nd chord: 4\n\
  \    3rd chord: 4\n    4th chord: Sad\n    Progression: .nan\n-   1st chord: 4\n\
  \    2nd chord: 5\n    3rd chord: 4\n    4th chord: Sad\n    Progression: .nan\n\
  -   1st chord: 4\n    2nd chord: 1\n    3rd chord: 1\n    4th chord: Sweet\n   \
  \ Progression: .nan\n-   1st chord: 4\n    2nd chord: 1\n    3rd chord: 4\n    4th\
  \ chord: Simple\n    Progression: .nan\n-   1st chord: 5\n    2nd chord: 5\n   \
  \ 3rd chord: 1\n    4th chord: Simple\n    Progression: .nan\n-   1st chord: 4\n\
  \    2nd chord: 1\n    3rd chord: 4\n    4th chord: Wildside\n    Progression: .nan\n\
  -   1st chord: 1\n    2nd chord: 4\n    3rd chord: 6\n    4th chord: Wistful\n \
  \   Progression: .nan\n-   1st chord: 1\n    2nd chord: 5\n    3rd chord: 7\n  \
  \  4th chord: Moody\n    Progression: .nan\n-   1st chord: 1\n    2nd chord: 7\n\
  \    3rd chord: 6\n    4th chord: Moody\n    Progression: .nan\n"

Answer 1

text 已经是 YAML；你不需要第二次编码。

with open('getData.yml', 'w') as outfile:
    print(text, file=outfile)

或

with open('getData.yml', 'w') as outfile:
    yaml.dump(
        df.to_dict(orient='records'),
        outfile,
        sort_keys=False,
        width=72,
        indent=4
    )

Answer 2

这里发生的事情是，您将 yaml 倾倒了两次。首先，在这一行：

""" Convert csv to yml """
text = yaml.dump(
    df.to_dict(orient='records'),
    sort_keys=False, width=72, indent=4)

此时，text 是一个包含您的 yaml 值的字符串。

然后，你再把它转储到这里：

""" Export the recently converted yml to getData.yml """
with open('getData.yml', 'w') as outfile:
    yaml.dump(text, outfile, default_flow_style=False)

因为你转储的只是一个字符串，它会在你的文件中显示为一个字符串。您可以将字符串直接写入文件：

with open('getData.yml', 'w') as outfile:
    outfile.write(text)

或者，您可以将 csv 直接转储到 yaml 中，如下所示：

with open('getData.yml', 'w') as outfile:
    yaml.dump(
        df.to_dict(orient='records'), outfile,
        sort_keys=False, width=72, indent=4, default_flow_style=False)

当我转储到另一个文件时如何删除引号？

How to remove quotes when I dump to another file?

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pandas