无法让AWS SAM与Python3.5.x一起工作

Question

我确信这个问题是由于我自己对Python和pip的无知所致，然而，我已经浏览了一下网络，并尝试了许多东西来使它工作，到目前为止，没有结果。

我有一个基于Bitbucket管道默认映像(version 2)：atlassian/default-image:2的坞映像，它使用Python2.7.x。而SAM不起作用，我查看了AWS的文档，这说明SAM不再支持Python2.7.x，所以我从码头容器中删除了所有Python安装(在本地调试Bitbucket管道)，并试图确保只安装了Python3和pip3 (我甚至设置了从/usr/bin/python到/usr/bin/python3和从/usr/bin/pip到/usr/bin/pip3的符号链接--不过，这似乎是一件愚蠢的事情)。

我还尝试使用Python3.6进行上述操作，因为错误消息(如下图所示)似乎显示了Python 'f-String‘语法，根据Python的文档，这个语法是在3.6中引入的。

我所做的一切似乎都没有用，我越看这个，我就越被困在一个似乎永无尽头的Python版本和linux包的网络中！

错误(和python版本)可以在这里看到：

root@eb3dc6ff9997:/localDebugRepo/infrastructure# pip3 install -U aws-sam-cli==1.22.0
Requirement already up-to-date: aws-sam-cli==1.22.0 in /usr/local/lib/python3.5/dist-packages
Requirement already up-to-date: jmespath~=0.10.0 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: boto3~=1.14 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: cookiecutter~=1.7.2 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: aws-sam-translator==1.35.0 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: aws-lambda-builders==1.3.0 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: tomlkit==0.7.0 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: dateparser~=0.7 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: requests==2.23.0 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: watchdog==0.10.3 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: PyYAML~=5.3 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: serverlessrepo==0.1.10 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: Flask~=1.1.2 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: chevron~=0.12 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: click~=7.1 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: docker~=4.2.0 in /usr/local/lib/python3.5/dist-packages (from aws-sam-cli==1.22.0)
Requirement already up-to-date: s3transfer<0.4.0,>=0.3.0 in /usr/local/lib/python3.5/dist-packages (from boto3~=1.14->aws-sam-cli==1.22.0)
Requirement already up-to-date: botocore<1.21.0,>=1.20.50 in /usr/local/lib/python3.5/dist-packages (from boto3~=1.14->aws-sam-cli==1.22.0)
Requirement already up-to-date: binaryornot>=0.4.4 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: six>=1.10 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: poyo>=0.5.0 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: jinja2-time>=0.2.0 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: MarkupSafe<2.0.0 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: Jinja2<3.0.0 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: python-slugify>=4.0.0 in /usr/local/lib/python3.5/dist-packages (from cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: jsonschema~=3.2 in /usr/local/lib/python3.5/dist-packages (from aws-sam-translator==1.35.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: setuptools in /usr/local/lib/python3.5/dist-packages (from aws-lambda-builders==1.3.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: wheel in /usr/local/lib/python3.5/dist-packages (from aws-lambda-builders==1.3.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: regex!=2019.02.19 in /usr/local/lib/python3.5/dist-packages (from dateparser~=0.7->aws-sam-cli==1.22.0)
Requirement already up-to-date: pytz in /usr/local/lib/python3.5/dist-packages (from dateparser~=0.7->aws-sam-cli==1.22.0)
Requirement already up-to-date: tzlocal in /usr/local/lib/python3.5/dist-packages (from dateparser~=0.7->aws-sam-cli==1.22.0)
Requirement already up-to-date: python-dateutil in /usr/local/lib/python3.5/dist-packages (from dateparser~=0.7->aws-sam-cli==1.22.0)
Requirement already up-to-date: chardet<4,>=3.0.2 in /usr/local/lib/python3.5/dist-packages (from requests==2.23.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: idna<3,>=2.5 in /usr/local/lib/python3.5/dist-packages (from requests==2.23.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: urllib3!=1.25.0,!=1.25.1,<1.26,>=1.21.1 in /usr/local/lib/python3.5/dist-packages (from requests==2.23.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: certifi>=2017.4.17 in /usr/local/lib/python3.5/dist-packages (from requests==2.23.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: pathtools>=0.1.1 in /usr/local/lib/python3.5/dist-packages (from watchdog==0.10.3->aws-sam-cli==1.22.0)
Requirement already up-to-date: itsdangerous>=0.24 in /usr/local/lib/python3.5/dist-packages (from Flask~=1.1.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: Werkzeug>=0.15 in /usr/local/lib/python3.5/dist-packages (from Flask~=1.1.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: websocket-client>=0.32.0 in /usr/local/lib/python3.5/dist-packages (from docker~=4.2.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: arrow in /usr/local/lib/python3.5/dist-packages (from jinja2-time>=0.2.0->cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: text-unidecode>=1.3 in /usr/local/lib/python3.5/dist-packages (from python-slugify>=4.0.0->cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: importlib-metadata; python_version < "3.8" in /usr/local/lib/python3.5/dist-packages (from jsonschema~=3.2->aws-sam-translator==1.35.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: pyrsistent>=0.14.0 in /usr/local/lib/python3.5/dist-packages (from jsonschema~=3.2->aws-sam-translator==1.35.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: attrs>=17.4.0 in /usr/local/lib/python3.5/dist-packages (from jsonschema~=3.2->aws-sam-translator==1.35.0->aws-sam-cli==1.22.0)
Requirement already up-to-date: typing-extensions; python_version < "3.8" in /usr/local/lib/python3.5/dist-packages (from arrow->jinja2-time>=0.2.0->cookiecutter~=1.7.2->aws-sam-cli==1.22.0)
Requirement already up-to-date: zipp>=0.5 in /usr/local/lib/python3.5/dist-packages (from importlib-metadata; python_version < "3.8"->jsonschema~=3.2->aws-sam-translator==1.35.0->aws-sam-cli==1.22.0)
You are using pip version 8.1.1, however version 21.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
root@eb3dc6ff9997:/localDebugRepo/infrastructure# python --version
bash: /usr/bin/python: No such file or directory
root@eb3dc6ff9997:/localDebugRepo/infrastructure# pip --version
bash: /usr/bin/pip: No such file or directory
root@eb3dc6ff9997:/localDebugRepo/infrastructure# python3 --version
Python 3.5.2
root@eb3dc6ff9997:/localDebugRepo/infrastructure# pip3 --version
pip 8.1.1 from /usr/lib/python3/dist-packages (python 3.5)
root@eb3dc6ff9997:/localDebugRepo/infrastructure# sam --version
Traceback (most recent call last):
  File "/usr/local/bin/sam", line 7, in <module>
    from samcli.cli.main import cli
  File "/usr/local/lib/python3.5/dist-packages/samcli/cli/main.py", line 86
    cmdline_args_log += f"--{key} "
                                  ^
SyntaxError: invalid syntax
root@eb3dc6ff9997:/localDebugRepo/infrastructure# 

我非常希望有一些正确的方法来确切地知道我需要哪个Python版本，以及一个安装和配置它的正确方法。

请帮助我:)

Answer 1

在大多数情况下，我建议只使用已经安装python 3的docker映像，而不是修改现有映像中的python安装或安装新映像。这个bitbucket页面讨论使用不同的基本图像。

还有一个有关如何使用python基映像的页面。

除此之外，根据您想要如何使用SAM，您可能可以使用内建比特桶“管”来部署到SAM。这是一些管道的信息。。我认为这将绕过在您的构建中安装SAM的需要。

我本人没有使用过这个管道，但是我认为它的工作方式是在管道中构建部署工件文件，缓存它以便在以后的步骤中可用，然后将该文件设置为SAM管道用于部署它的输入。SAM管道在一个单独的容器中运行，因此它已经安装在该容器中。你只要把文件传进去。

最后，我从来没有使用过SAM，所以请稍加考虑，但是我没有看到在正式的AWS Linux安装文档或在github页面上上使用正式的AWS Linux安装文档安装CLI的参考。我确实找到了本期，从中收集了以下信息：

• 可以安装pip，但不建议安装
• Python 3.5不受aws sam cli的支持
• 如果您在说明中使用安装程序，听起来它将为您处理python版本控制。
• 他们希望针对Python的单个版本，所以如果您使用pip，也许最新的或者第二个最新的Python版本可以工作。只是猜猜..。