python - 为 Yocto 创建配方时，python3 中没有名为 'datetime' 的模块，但 python2.7 中存在日期时间

Question

主机

Debian 9.4 服务器

Yocto 分支

krogoth、BitBake 构建工具核心版本 1.30.0

工作流程工具

开发工具

要求

它们应该在硬件上作为 python3.5 包提供

我想创建食谱:

1. pynmea2 v1.7.1
2. influxdb-python v5.2.0

我在 $BUILD_DIR 中使用以下步骤:

1. devtool 添加 pynmea2 https://github.com/Knio/pynmea2/archive/v1.7.1.tar.gz
2. devtool 添加 influxdb-python https://github.com/influxdata/influxdb-python/archive/v5.2.0.tar.gz

我从工具中获取食谱。我将所有运行时依赖项的 RDEPENDS_${PN} += "python-re" 更改为 RDEPENDS_${PN} += "${PYTHON_PN}-re"将此信息转移到各自的 .inc 文件中。下面的 Github Gist 中提到了这些文件

GitHub 要点

Gists for pynmea2 and influxdb-python

图像创建

对于本地测试，我将这些配方从 workspace 文件夹(由 devtool 自动创建)添加到 `IMAGE_INSTALL_append 下的 local.conf 中=“influxdb-python pynmea2”

并刻录硬件镜像。

董事会

在板上，我运行 python3 shell 以查看是否可以导入这些包。这是 shell 的输出:

pynmea2:

Python 3.5.1 (default, Sep 25 2018, 19:27:54)
[GCC 5.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import pynmea2
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.5/site-packages/pynmea2/__init__.py", line 13, in <module>
    from .types import *
  File "/usr/lib/python3.5/site-packages/pynmea2/types/__init__.py", line 3, in <module>
    from .talker import *
  File "/usr/lib/python3.5/site-packages/pynmea2/types/talker.py", line 3, in <module>
    from ..nmea_utils import *
  File "/usr/lib/python3.5/site-packages/pynmea2/nmea_utils.py", line 2, in <module>
    import datetime
ImportError: No module named 'datetime'

influxdb-python:

Python 3.5.1 (default, Sep 25 2018, 19:27:54)
[GCC 5.3.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import influxdb
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.5/site-packages/influxdb/__init__.py", line 9, in <module>
    from .client import InfluxDBClient
  File "/usr/lib/python3.5/site-packages/influxdb/client.py", line 14, in <module>
    import requests
  File "/usr/lib/python3.5/site-packages/requests/__init__.py", line 58, in <module>
    from . import utils
  File "/usr/lib/python3.5/site-packages/requests/utils.py", line 12, in <module>
    import cgi
  File "/usr/lib/python3.5/cgi.py", line 30, in <module>
    from email.parser import FeedParser
  File "/usr/lib/python3.5/email/parser.py", line 12, in <module>
    from email.feedparser import FeedParser, BytesFeedParser
  File "/usr/lib/python3.5/email/feedparser.py", line 27, in <module>
    from email import message
  File "/usr/lib/python3.5/email/message.py", line 16, in <module>
    from email import utils
  File "/usr/lib/python3.5/email/utils.py", line 30, in <module>
    import datetime
ImportError: No module named 'datetime'

对比

如果我在板上运行 python 命令并尝试import datetime，则该模块存在。

有什么问题吗？为什么 datetime 不能作为 python 3.5 的模块使用？

local.conf 片段

IMAGE_INSTALL_append = " python3 python3-dev python3-enum pynmea2 influxdb-python python3-pyserial " 

编辑

我还在 local.conf 文件中显式添加了 IMAGE_INSTALL_append = "python3-datetime"。但还是同样的错误。

python-3.5-manifest.inc

SUMMARY_${PN}-modules="All Python modules"
RDEPENDS_${PN}-modules="${PN}-2to3 ${PN}-argparse ${PN}-asyncio ${PN}-audio ${PN}-codecs ${PN}-compile ${PN}-compression ${PN}-core ${PN}-crypt ${PN}-ctypes ${PN}-curses ${PN}-datetime ${PN}-db ${PN}-debugger ${PN}-difflib ${PN}-distutils ${PN}-doctest ${PN}-email ${PN}-enum ${PN}-fcntl ${PN}-gdbm ${PN}-html ${PN}-idle ${PN}-image ${PN}-importl
ib ${PN}-io ${PN}-json ${PN}-lang ${PN}-logging ${PN}-mailbox ${PN}-math ${PN}-mime ${PN}-mmap ${PN}-multiprocessing ${PN}-netclient ${PN}-netserver ${PN}-numbers ${PN}-pickle ${PN}-pkgutil ${PN}-pprint ${PN}-profile ${PN}-pydoc ${PN}-re ${PN}-readline ${PN}-reprlib ${PN}-resource ${PN}-selectors ${PN}-shell ${PN}-signal ${PN}-smtpd ${PN}-sqlit
e3 ${PN}-sqlite3-tests ${PN}-stringold ${PN}-subprocess ${PN}-syslog ${PN}-terminal ${PN}-tests ${PN}-textutils ${PN}-threading ${PN}-tkinter ${PN}-unittest ${PN}-unixadmin ${PN}-xml ${PN}-xmlrpc  "
ALLOW_EMPTY_${PN}-modules = "1"

list 文件中已包含日期时间？如果有必要，我应该更改文件中的哪些内容？ (我应该将其添加到元自定义层中吗？)

Answer 1

查看 source/poky/meta/recipes-devtools/python/python-3.5-manifest.inc 中的 python-3.5-manifest.inc 文件>

尝试显式引入 python-datetime:

IMAGE_INSTALL_append += "python3-datetime"