import os
import re
REQUIREMENTS = os.getcwd() + '/requirements.txt'
def getDepends():
   requirements = open(REQUIREMENTS, 'r')
   libs = requirements.readlines()
   libList = []
   for lib in libs:
       try:
           name = re.search("^.+(?===)", lib).group(0)
           version = re.search("(?<===).+$", lib).group(0)
           libDict = {
               "name": name,
               "version": version
          }
           libList.append(libDict)
       except:
           continue
   return libList
def importLib():
   """Load python dependent libraries dynamically"""
?
   libList = getDepends()
?
   from pip._internal import main as pip_main
   import importlib
?
   def install(package):
       pip_main(['install', package])
?
   createVar = locals()
?
   for lib in libList:
       print(lib)
       try:
           createVar[lib["name"]] = importlib.import_module(lib["name"])
       except Exception as e:
           try:
               install(f'{lib["name"]}=={lib["version"]}')
               createVar[lib["name"]] = importlib.import_module(lib["name"])
           except Exception as e:
               print(e)
importLib()

這時dypend會檢查你的Python環(huán)境中是否都有 requirements.txt 中的包，如果沒有，dypend會自動下載。

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