定义正确的 requirements.txt 文件
Defining a correct requirements.txt file
我开发了一个 Flask Web 应用程序，它可以在我的本地计算机上运行，但我现在正试图将其移植到 Web 上（通过 IBM Bluemix）。我第一次这样做的尝试没有成功。我收到的错误消息是：
Server error, status code: 400, error code: 170001, message: Staging error: no available stagers
当我用 cf logs myapp --recent 检查日志文件时，我发现：
2015-11-08T15:34:15.92-0500 [STG/35] OUT -----> Downloaded app package (72K)
2015-11-08T15:34:19.98-0500 [STG/35] OUT -----> Downloaded app buildpack cache (39M)
2015-11-08T15:34:24.82-0500 [STG/0] OUT -------> Buildpack version 1.3.1
2015-11-08T15:34:40.57-0500 [STG/0] OUT -----> Installing dependencies with pip
2015-11-08T15:34:41.54-0500 [STG/0] OUT You are using pip version 6.1.0.dev0, however version 7.1.2 is available.
2015-11-08T15:34:41.54-0500 [STG/0] OUT You should consider upgrading via the 'pip install --upgrade pip' command.
2015-11-08T15:34:41.56-0500 [STG/0] OUT Collecting flask.ext.wtf (from -r requirements.txt (line 2))
2015-11-08T15:34:41.88-0500 [STG/0] OUT Could not find a version that satisfies the requirement flask.ext.wtf (from -r requirements.txt (line 2)) (from versions: )
2015-11-08T15:34:41.88-0500 [STG/0] OUT No matching distribution found for flask.ext.wtf (from -r requirements.txt (line 2))
2015-11-08T15:34:41.96-0500 [STG/0] OUT Staging failed: Buildpack compilation step failed
2015-11-08T15:34:41.97-0500 [STG/0] ERR
2015-11-08T15:34:42.67-0500 [API/2] ERR encountered error: App staging failed in the buildpack compile phase
2015-11-08T15:35:37.75-0500 [API/3] OUT Updated app with guid b580bb64-4415-4bb4-8fd1-1e4d3de4f7d9 ({"name"=>"cultural-insight", "memory"=>128, "environment_json"=>"PRIVATE DATA HIDDEN"})
2015-11-08T15:35:49.95-0500 [API/3] OUT Updated app with guid b580bb64-4415-4bb4-8fd1-1e4d3de4f7d9 ({"state"=>"STOPPED"})
2015-11-08T15:35:52.41-0500 [DEA/113] OUT Got staging request for app with id b580bb64-4415-4bb4-8fd1-1e4d3de4f7d9
2015-11-08T15:35:52.47-0500 [API/0] ERR exception handling first response Staging error: failed to stage application:
2015-11-08T15:35:52.47-0500 [API/0] ERR Not enough memory resources available
2015-11-08T15:50:52.42-0500 [API/0] ERR encountered error: Staging error: failed to stage application: staging had already been marked as failed, this could mean that staging took too long
问题似乎是 pip 找不到 Flask-WTF，我的应用程序需要它才能工作。
我用 pip install Flask-WTF 在本地机器上安装了 Flask-WTF。构建器在设置时摄取的 requirements.txt 的内容很简单：
Flask==0.10.1
Flask-WTF
特别是，我不确定为什么 pip 要求 flask.ext.wtf？此外，当我将它提高到 512 MB 时，应用程序说它限制为 128 MB，这让我很困扰。
总而言之，我不确定发生了什么。我该如何解决这个问题？完整的源代码是 here.
运行 这个（已编辑）：
pip install --upgrade pip
并更新您的 requirements.txt 文件：
pip freeze > requirements.txt
我开发了一个 Flask Web 应用程序，它可以在我的本地计算机上运行，但我现在正试图将其移植到 Web 上（通过 IBM Bluemix）。我第一次这样做的尝试没有成功。我收到的错误消息是：
Server error, status code: 400, error code: 170001, message: Staging error: no available stagers
当我用 cf logs myapp --recent 检查日志文件时，我发现：
2015-11-08T15:34:15.92-0500 [STG/35] OUT -----> Downloaded app package (72K)
2015-11-08T15:34:19.98-0500 [STG/35] OUT -----> Downloaded app buildpack cache (39M)
2015-11-08T15:34:24.82-0500 [STG/0] OUT -------> Buildpack version 1.3.1
2015-11-08T15:34:40.57-0500 [STG/0] OUT -----> Installing dependencies with pip
2015-11-08T15:34:41.54-0500 [STG/0] OUT You are using pip version 6.1.0.dev0, however version 7.1.2 is available.
2015-11-08T15:34:41.54-0500 [STG/0] OUT You should consider upgrading via the 'pip install --upgrade pip' command.
2015-11-08T15:34:41.56-0500 [STG/0] OUT Collecting flask.ext.wtf (from -r requirements.txt (line 2))
2015-11-08T15:34:41.88-0500 [STG/0] OUT Could not find a version that satisfies the requirement flask.ext.wtf (from -r requirements.txt (line 2)) (from versions: )
2015-11-08T15:34:41.88-0500 [STG/0] OUT No matching distribution found for flask.ext.wtf (from -r requirements.txt (line 2))
2015-11-08T15:34:41.96-0500 [STG/0] OUT Staging failed: Buildpack compilation step failed
2015-11-08T15:34:41.97-0500 [STG/0] ERR
2015-11-08T15:34:42.67-0500 [API/2] ERR encountered error: App staging failed in the buildpack compile phase
2015-11-08T15:35:37.75-0500 [API/3] OUT Updated app with guid b580bb64-4415-4bb4-8fd1-1e4d3de4f7d9 ({"name"=>"cultural-insight", "memory"=>128, "environment_json"=>"PRIVATE DATA HIDDEN"})
2015-11-08T15:35:49.95-0500 [API/3] OUT Updated app with guid b580bb64-4415-4bb4-8fd1-1e4d3de4f7d9 ({"state"=>"STOPPED"})
2015-11-08T15:35:52.41-0500 [DEA/113] OUT Got staging request for app with id b580bb64-4415-4bb4-8fd1-1e4d3de4f7d9
2015-11-08T15:35:52.47-0500 [API/0] ERR exception handling first response Staging error: failed to stage application:
2015-11-08T15:35:52.47-0500 [API/0] ERR Not enough memory resources available
2015-11-08T15:50:52.42-0500 [API/0] ERR encountered error: Staging error: failed to stage application: staging had already been marked as failed, this could mean that staging took too long
问题似乎是 pip 找不到 Flask-WTF，我的应用程序需要它才能工作。
我用 pip install Flask-WTF 在本地机器上安装了 Flask-WTF。构建器在设置时摄取的 requirements.txt 的内容很简单：
Flask==0.10.1
Flask-WTF
特别是，我不确定为什么 pip 要求 flask.ext.wtf？此外，当我将它提高到 512 MB 时，应用程序说它限制为 128 MB，这让我很困扰。
总而言之，我不确定发生了什么。我该如何解决这个问题？完整的源代码是 here.
运行 这个（已编辑）：
pip install --upgrade pip
并更新您的 requirements.txt 文件：
pip freeze > requirements.txt