PIP仅会将软件包安装到Python 2
PIP仅会将软件包安装到Python 2
提问于 2021-07-24 04:33:58
我有一台运行Ubuntu 16.04的计算机，我正在尝试使用Python。我需要安装pyserial包。运行pip install pyserial没有任何问题，但是当我尝试在Python3 (3.9.6)中导入包时，我得到一个错误，没有名为serial的模块。当我尝试运行python3 -m pip install pyserial时，我得到一个错误消息/usr/local/bin/python3: No module named pip。我已经运行了sudo apt-get install -y python3-pip，没有任何错误，但这并不能解决pip的问题。与运行pip3 install pyserial相同，而不仅仅是运行pip。我最近用python 3.9.6替换了python 3.5.2，当我执行python3 -v时，我得到了一条非常长的错误消息(如下所示)，所以我认为这可能与它有关，但我只是不确定。我不知道是不是安装搞砸了，有一些东西需要清理，或者是否有其他事情正在进行。
import _frozen_importlib # frozen
import _imp # builtin
import '_thread' # <class '_frozen_importlib.BuiltinImporter'>
import '_warnings' # <class '_frozen_importlib.BuiltinImporter'>
import '_weakref' # <class '_frozen_importlib.BuiltinImporter'>
import '_io' # <class '_frozen_importlib.BuiltinImporter'>
import 'marshal' # <class '_frozen_importlib.BuiltinImporter'>
import 'posix' # <class '_frozen_importlib.BuiltinImporter'>
import '_frozen_importlib_external' # <class '_frozen_importlib.FrozenImporter'>
# installing zipimport hook
import 'time' # <class '_frozen_importlib.BuiltinImporter'>
import 'zipimport' # <class '_frozen_importlib.FrozenImporter'>
# installed zipimport hook
# /usr/local/lib/python3.9/encodings/__pycache__/__init__.cpython-39.pyc matches /usr/local/lib/python3.9/encodings/__init__.py
# code object from '/usr/local/lib/python3.9/encodings/__pycache__/__init__.cpython-39.pyc'
# /usr/local/lib/python3.9/__pycache__/codecs.cpython-39.pyc matches /usr/local/lib/python3.9/codecs.py
# code object from '/usr/local/lib/python3.9/__pycache__/codecs.cpython-39.pyc'
import '_codecs' # <class '_frozen_importlib.BuiltinImporter'>
import 'codecs' # <_frozen_importlib_external.SourceFileLoader object at 0x7f41506b8700>
# /usr/local/lib/python3.9/encodings/__pycache__/aliases.cpython-39.pyc matches /usr/local/lib/python3.9/encodings/aliases.py
# code object from '/usr/local/lib/python3.9/encodings/__pycache__/aliases.cpython-39.pyc'
import 'encodings.aliases' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150653ca0>
import 'encodings' # <_frozen_importlib_external.SourceFileLoader object at 0x7f41506b8460>
# /usr/local/lib/python3.9/encodings/__pycache__/utf_8.cpython-39.pyc matches /usr/local/lib/python3.9/encodings/utf_8.py
# code object from '/usr/local/lib/python3.9/encodings/__pycache__/utf_8.cpython-39.pyc'
import 'encodings.utf_8' # <_frozen_importlib_external.SourceFileLoader object at 0x7f41506b8940>
import '_signal' # <class '_frozen_importlib.BuiltinImporter'>
# /usr/local/lib/python3.9/encodings/__pycache__/latin_1.cpython-39.pyc matches /usr/local/lib/python3.9/encodings/latin_1.py
# code object from '/usr/local/lib/python3.9/encodings/__pycache__/latin_1.cpython-39.pyc'
import 'encodings.latin_1' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150653d90>
# /usr/local/lib/python3.9/__pycache__/io.cpython-39.pyc matches /usr/local/lib/python3.9/io.py
# code object from '/usr/local/lib/python3.9/__pycache__/io.cpython-39.pyc'
# /usr/local/lib/python3.9/__pycache__/abc.cpython-39.pyc matches /usr/local/lib/python3.9/abc.py
# code object from '/usr/local/lib/python3.9/__pycache__/abc.cpython-39.pyc'
import '_abc' # <class '_frozen_importlib.BuiltinImporter'>
import 'abc' # <_frozen_importlib_external.SourceFileLoader object at 0x7f415066b280>
import 'io' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150653f70>
# /usr/local/lib/python3.9/__pycache__/site.cpython-39.pyc matches /usr/local/lib/python3.9/site.py
# code object from '/usr/local/lib/python3.9/__pycache__/site.cpython-39.pyc'
# /usr/local/lib/python3.9/__pycache__/os.cpython-39.pyc matches /usr/local/lib/python3.9/os.py
# code object from '/usr/local/lib/python3.9/__pycache__/os.cpython-39.pyc'
# /usr/local/lib/python3.9/__pycache__/stat.cpython-39.pyc matches /usr/local/lib/python3.9/stat.py
# code object from '/usr/local/lib/python3.9/__pycache__/stat.cpython-39.pyc'
import '_stat' # <class '_frozen_importlib.BuiltinImporter'>
import 'stat' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150608af0>
# /usr/local/lib/python3.9/__pycache__/_collections_abc.cpython-39.pyc matches /usr/local/lib/python3.9/_collections_abc.py
# code object from '/usr/local/lib/python3.9/__pycache__/_collections_abc.cpython-39.pyc'
import '_collections_abc' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150608b80>
# /usr/local/lib/python3.9/__pycache__/posixpath.cpython-39.pyc matches /usr/local/lib/python3.9/posixpath.py
# code object from '/usr/local/lib/python3.9/__pycache__/posixpath.cpython-39.pyc'
# /usr/local/lib/python3.9/__pycache__/genericpath.cpython-39.pyc matches /usr/local/lib/python3.9/genericpath.py
# code object from '/usr/local/lib/python3.9/__pycache__/genericpath.cpython-39.pyc'
import 'genericpath' # <_frozen_importlib_external.SourceFileLoader object at 0x7f41506401f0>
import 'posixpath' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150608ac0>
import 'os' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150680220>
# /usr/local/lib/python3.9/__pycache__/_sitebuiltins.cpython-39.pyc matches /usr/local/lib/python3.9/_sitebuiltins.py
# code object from '/usr/local/lib/python3.9/__pycache__/_sitebuiltins.cpython-39.pyc'
import '_sitebuiltins' # <_frozen_importlib_external.SourceFileLoader object at 0x7f4150680af0>
import 'site' # <_frozen_importlib_external.SourceFileLoader object at 0x7f415066ba60>
Python 3.9.6 (default, Jul 23 2021, 14:48:54)
[GCC 5.4.0 20160609] on linux
Type "help", "copyright", "credits" or "license" for more information.
import 'atexit' # <class '_frozen_importlib.BuiltinImporter'>回答 1
Stack Overflow用户
发布于 2021-07-24 10:47:29
在安装package.Just时，尽量明确地提到您想要安装的Python版本，然后安装它。Try：python3.9 -m pip install library_name您会遇到这个问题，因为您有多个python3.x安装，所以当您尝试python3 -m pip install library_name时，它可能会与其他python3.x安装一起安装软件包。
您可以通过输入python3 --version来检查默认的python3.x版本，如果您不想每次都显式地指定它，那么可以在.bashrc文件中更改命令python3.x。
当我在我的system.But上尝试python3.8 -v时，我得到了相同的输出，显式地提到版本名称会有所帮助。
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/68504784
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