Problem with environment_py.yml

[huanfachen]

A student failed to install the env using this yml file on Windows 10 (see the error message below). It was an issue with the syntax of the yml file. The solution was to copy the content of this yml file to YAML Lint and to download the new content. Hope that this is helpful!

OS: Windows 10 conda version: conda 4.9.2 Error message:

Traceback (most recent call last):
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda\exceptions.py", line 1079, in __call__
        return func(*args, **kwargs)
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda_env\cli\main.py", line 80, in do_call
        exit_code = getattr(module, func_name)(args, parser)
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda_env\cli\main_create.py", line 87, in execute
        spec = specs.detect(name=name, filename=filename, directory=os.getcwd())
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda_env\specs\__init__.py", line 43, in detect
        if spec.can_handle():
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda_env\specs\yaml_file.py", line 18, in can_handle
        self._environment = env.from_file(self.filename)
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda_env\env.py", line 160, in from_file
        return from_yaml(yamlstr, filename=filename)
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda_env\env.py", line 141, in from_yaml
        data = yaml_safe_load(yamlstr)
      File "C:\Users\Owner\anaconda3\lib\site-packages\conda\common\serialize.py", line 67, in yaml_safe_load
        return yaml.safe_load(string, version="1.2")
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\main.py", line 980, in safe_load
        return load(stream, SafeLoader, version)
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\main.py", line 935, in load
        return loader._constructor.get_single_data()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\constructor.py", line 109, in get_single_data
        node = self.composer.get_single_node()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\composer.py", line 78, in get_single_node
        document = self.compose_document()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\composer.py", line 104, in compose_document
        self.parser.get_event()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\parser.py", line 163, in get_event
        self.current_event = self.state()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\parser.py", line 239, in parse_document_end
        token = self.scanner.peek_token()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\scanner.py", line 182, in peek_token
        self.fetch_more_tokens()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\scanner.py", line 282, in fetch_more_tokens
        return self.fetch_value()
      File "C:\Users\Owner\anaconda3\lib\site-packages\ruamel_yaml\scanner.py", line 651, in fetch_value
        raise ScannerError(
    ruamel_yaml.scanner.ScannerError: mapping values are not allowed here
      in "<unicode string>", line 89, column 65:
         ... e" content="{&quot;version&quot;: &quot;4&quot;, &quot;rollouts& ...
                                             ^ (line: 89)
 
`$ C:\Users\Owner\anaconda3\Scripts\conda-env-script.py create -f environment_py.yml`
 
  environment variables:
                 CIO_TEST=<not set>
  CONDA_AUTO_UPDATE_CONDA=false
        CONDA_DEFAULT_ENV=base
                CONDA_EXE=C:\Users\Owner\anaconda3\condabin\..\Scripts\conda.exe
             CONDA_PREFIX=C:\Users\Owner\anaconda3
    CONDA_PROMPT_MODIFIER=(base)
         CONDA_PYTHON_EXE=C:\Users\Owner\anaconda3\python.exe
               CONDA_ROOT=C:\Users\Owner\anaconda3
              CONDA_SHLVL=1
           CURL_CA_BUNDLE=<not set>
                 HOMEPATH=\Users\Owner
      MIC_LD_LIBRARY_PATH=C:\Program Files (x86)\Common Files\Intel\Shared
                          Libraries\compiler\lib\mic
                     PATH=C:\Users\Owner\anaconda3;C:\Users\Owner\anaconda3\Library\mingw-w64\bi
                          n;C:\Users\Owner\anaconda3\Library\usr\bin;C:\Users\Owner\anaconda3\Li
                          brary\bin;C:\Users\Owner\anaconda3\Scripts;C:\Users\Owner\anaconda3\bi
                          n;C:\Users\Owner\anaconda3\condabin;C:\Program Files (x86)\Common
                          Files\Intel\Shared Libraries\redist\intel64\compiler;C:\ProgramData\Or
                          acle\Java\javapath;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\
                          Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0;C:\Program
                          Files\Java\jdk-9.0.1\bin;C:\Program
                          Files\Java\jdk-9.0.1\bin;C:\Program Files
                          (x86)\QuickTime\QTSystem;C:\WINDOWS\System32\OpenSSH;C:\Program Files\
                          dotnet;C:\Users\Owner\AppData\Local\Programs\Python\Python37-32;C:\Pro
                          gram Files\Intel\WiFi\bin;C:\Program Files\Common
                          Files\Intel\WirelessCommon;C:\Program Files (x86)\Intel\Intel(R)
                          Management Engine Components\DAL;C:\Program Files\Intel\Intel(R)
                          Management Engine Components\DAL;C:\Program Files\MySQL\MySQL Shell 8.
                          0\bin;C:\Users\Owner\AppData\Local\Programs\Python\Python37-32\Scripts
                          ;C:\Users\Owner\AppData\Local\Programs\Python\Python37-32;C:\Users\Own
                          er\AppData\Local\Microsoft\WindowsApps;C:\Users\Owner\AppData\Local\at
                          om\bin;C:\Users\Owner\AppData\Local\Microsoft\WindowsApps;C:\Program
                          Files\Intel\WiFi\bin;C:\Program Files\Common
                          Files\Intel\WirelessCommon
             PSMODULEPATH=C:\Program Files\WindowsPowerShell\Modules;C:\WINDOWS\system32\Windows
                          PowerShell\v1.0\Modules
              PYTHON_HOME=C:\Users\Owner\AppData\Local\Programs\Python\Python37-32
       REQUESTS_CA_BUNDLE=<not set>
            SSL_CERT_FILE=<not set>
    VBOX_MSI_INSTALL_PATH=C:\Program Files\Oracle\VirtualBox\
 
     active environment : base
    active env location : C:\Users\Owner\anaconda3
            shell level : 1
       user config file : C:\Users\Owner\.condarc
 populated config files : C:\Users\Owner\.condarc
          conda version : 4.9.2
    conda-build version : 3.20.5
         python version : 3.8.5.final.0
       virtual packages : __cuda=11.0=0
                          __win=0=0
                          __archspec=1=x86_64
       base environment : C:\Users\Owner\anaconda3  (writable)
           channel URLs : https://repo.anaconda.com/pkgs/main/win-64
                          https://repo.anaconda.com/pkgs/main/noarch
                          https://repo.anaconda.com/pkgs/r/win-64
                          https://repo.anaconda.com/pkgs/r/noarch
                          https://repo.anaconda.com/pkgs/msys2/win-64
                          https://repo.anaconda.com/pkgs/msys2/noarch
          package cache : C:\Users\Owner\anaconda3\pkgs
                          C:\Users\Owner\.conda\pkgs
                          C:\Users\Owner\AppData\Local\conda\conda\pkgs
       envs directories : C:\Users\Owner\anaconda3\envs
                          C:\Users\Owner\.conda\envs
                          C:\Users\Owner\AppData\Local\conda\conda\envs
               platform : win-64
             user-agent : conda/4.9.2 requests/2.24.0 CPython/3.8.5 Windows/10 Windows/10.0.18362
          administrator : False
             netrc file : None
           offline mode : False
 
 
An unexpected error has occurred. Conda has prepared the above report.