python - 我在导入 PyDictionary 库时遇到问题

Question

基本上，我使用下载了该库，pip install PyDictionary并通过再次编写相同的内容来确保它存在，并且出现了：

Requirement already satisfied: PyDictionary in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (2.0.1)
Requirement already satisfied: bs4 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from PyDictionary) (0.0.1)
Requirement already satisfied: goslate in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from PyDictionary) (1.5.1)
Requirement already satisfied: requests in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from PyDictionary) (2.25.1)
Requirement already satisfied: click in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from PyDictionary) (7.1.2)
Requirement already satisfied: beautifulsoup4 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from bs4->PyDictionary) (4.9.3)
Requirement already satisfied: soupsieve>1.2 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from beautifulsoup4->bs4->PyDictionary) (2.2.1)
Requirement already satisfied: futures in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from goslate->PyDictionary) (3.1.1)
Requirement already satisfied: idna<3,>=2.5 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from requests->PyDictionary) (2.10)
Requirement already satisfied: urllib3<1.27,>=1.21.1 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from requests->PyDictionary) (1.26.4)
Requirement already satisfied: chardet<5,>=3.0.2 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from requests->PyDictionary) (4.0.0)
Requirement already satisfied: certifi>=2017.4.17 in c:\users\ziad\appdata\local\programs\python\python39\lib\site-packages (from requests->PyDictionary) (2020.12.5)

但是，当我尝试在 atom 中运行这个简单的程序时，它说找不到模块。这是程序：

from PyDictionary import PyDictionary
dictionary = PyDictionary()

print (dictionary.meaning("indentation"))

这是错误：

Traceback (most recent call last):
  File "C:\Users\Ziad\Desktop\programs\Dictionary.py", line 1, in <module>
    from PyDictionary import PyDictionary
ModuleNotFoundError: No module named 'PyDictionary'

我发现正确执行程序的唯一方法是将文件移动到库所在的文件夹中，以便 atom 可以找到该库。奇怪的是图书馆 numpy 完美地工作。我真的很想知道这个问题的答案。

标签： pythonmodulenotfounderror

Answer 1

您遇到的问题是您的pip命令未连接到您的python3.

如果您使用的是 Windows，那么您应该有一个“python 启动器”，您可以使用它来仔细检查您安装的 Python 版本，如下所示：

PS C:\> py -0
Installed Pythons found by C:\windows\py.exe Launcher for Windows
 -3.9-64 *
 -3.7-32

在这里，您可以看到我的设备上安装了两个版本的 Python。所以，让我们检查一下这两个安装都使用他们自己的pip.

让我们从我的3.7安装开始：

PS C:\> py -3.7 -m pip list
Package            Version
------------------ ---------
beautifulsoup4     4.8.1
Jinja2             2.11.2
keyring            21.2.0

在这里我们可以看到我安装了三个包。

现在让我们检查我的3.9安装：

PS C:\> py -3.9 -m pip list
Package                          Version
-------------------------------- ---------
matplotlib                       3.4.1
numpy                            1.19.4
pandas                           1.1.5
pip                              21.0.1

我在上面所做的基本上是调用不同的python安装，并使用以下标志打开它：

-m mod : run library module as a script (terminates option list)

该pip命令基本上只是 的别名<python-installation> -m pip，因此当我发出上述命令时，我将pip使用特定的 python 安装启动。

---

如果您没有上面示例中的“python-launcher”，但您的 python 解释器有不同的别名，那么您可以以相同的方式发出相同的命令，只需使用您的别名。

这里有几个例子：

# will show you the installed packages for the alias "python2"
python2 -m pip list

# will show you the installed packages for the alias "python3"
python3 -m pip list

而且您显然可以发出其他命令来pip使用相同的逻辑，因此如果您想为特定版本安装软件包，您可以执行以下操作：

# will try to install the given package for the alias "python3"
python3 -m pip install <nameOfPackage>