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python - 自动化导入模块

问题描述

如果它们不存在，我有这个来导入所有模块，问题是即使我有它们，如果我不存在它也会表现出来，我做错了什么？

listimport=["request","shutil","shutil","styless","time","tkinter","openpyxl","html","datetime","importlib","string",
      "easygui","bs4","webbrowser","glob","tarfile","webbrowser","pathlib","platform","subprocess","tkinterweb",
            "jira","numpy","matplotlib","calendar","sys","math","math","parser","pyautogui","dateutil","xlwt"]
for x_imp in listimport:
    try:
        import x_imp
    except ImportError as e:
        os.system('pip install ' + x_imp)

这总是尝试安装所有模块，即使它们已经存在，有什么想法吗？

标签： pythonpython-3.xpython-import

解决方案

当你导入一个模块时，你会这样做：

import request

使用您的程序，您将尝试像这样导入每个字符串：

import "request"

因为listimport包含字符串！所以每次都会出错！

__import__您可以使用相同的方法修复它，但是在字符串上：

import os

listimport = ["request","shutil","shutil","styless","time","tkinter","openpyxl","html","datetime","importlib","string",
      "easygui","bs4","webbrowser","glob","tarfile","webbrowser","pathlib","platform","subprocess","tkinterweb",
            "jira","numpy","matplotlib","calendar","sys","math","math","parser","pyautogui","dateutil","xlwt"]

for x_imp in listimport:
    try:
        __import__(x_imp)
    except ImportError as e:
        os.system('pip install ' + x_imp)

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