为Yocto创建配方时，python3中没有名为“datetime”的模块，但python2.7中存在datetime

Question

主机

Debian 9.4服务器

Yocto分支

krogoth，BitBake Build Tool Core version 1.30.0

工作流工具

devtool

要求

它们应该是硬件上的python3.5包

我想为以下各项创建配方：

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

我在我的$BUILD_DIR中使用以下步骤：

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

我从工具上得到食谱。我将所有运行时依赖项的RDEPENDS_${PN} += "python-re"更改为RDEPENDS_${PN} += "${PYTHON_PN}-re"，并将这些信息转移到它们各自的.inc文件中。下面的Github要点中提到了这些文件

GitHub Gists

Gists for pynmea2 and influxdb-python

形象塑造

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local.conf下的`IMAGE_INSTALL_append=“infuxdb python pynmea2”

为硬件烧录图像。在

董事会

在板上，我运行python3shell，看看是否可以导入这些包。下面是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：

^{pr2}$

对比度

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

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

{

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

编辑

我还显式地在local.conf文件中添加了IMAGE_INSTALL_append = " python3-datetime"。但还是同样的错误。在

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"

清单文件中已经有datetime？如果有必要，我应该在文件中更改什么？（是否应该将其添加到meta-custom层中？）在

Answer 1

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

尝试使用以下内容显式地拉入python datetime：

IMAGE_INSTALL_append += "python3-datetime"