The variablesys.pathis a list of strings that determines the interpreter’s search path for modules. It is initialized to a default path taken from the environment variablePYTHONPATH, or from a built-in default ifPYTHONPATHis not set. You can modify it using standard list operations: >>>imp...
官方文档说明:A list of strings that specifies the search path for modules. Initialized from the environment variablePYTHONPATH, plus an installation-dependent default. sys.path 初始化的时候有两部分:os.environ['PYTHONPATH'] 和 默认的安装依赖的一些路径(例如 python 安装的根目录 和 pythonxx.zip) sy...
Now execute the file at the command prompt (here in windows). Modules Path: In the directory ,the script is saved or in the current directory. in PYTHONPATH (a list of directory names), default search path for module files. PYTHONPATH is an environment variable. You will get it using '...
or import <name> statement, Python searches the following locations in order for a matching name: Python's built-in modules. The folder containing the Python code you're running. The "module search path" as defined by the applicable environment variable. (See The Module Search Path and Env...
For tree-like visualization, first run pip install pipdeptree and then pipdeptree. List of Built-in Python Modules entries per page Search: ModuleDescriptionCategory __future__ Future statement definitions Built-in & Special __main__ Top-level code environment and command-line interfaces Built...
2.7 sys.path A list of strings that specifies the search path for modules. Initialized from the environment variable PYTHONPATH, plus an installation-dependent default. 该属性是一个由字符串组成的列表,其中各个元素表示的是 Python 搜索模块的路径;在程序启动期间被初始化。 其中第一个元素(也就是path...
简单理解的话，就是首先检查sys.modules，从而判断这个模块是否已经被加载，如果没有则添加到sys.modules...
If the required module or package is not found in any of these locations, Python raises anImportError. By setting thePYTHONPATHcorrectly, you can specify additional directories where Python will look for modules, ensuring that your code can access them. ...
Step 2: Use thesysmodule to check if the Python executable is in the PATH Thesysmodule has a list calledpathwhich contains the search path for modules. We can iterate over this list and check if the Python executable is present.
Python Modules: Overview The Module Search Path The import Statement import <module_name> from <module_name> import <name(s)> from <module_name> import <name> as <alt_name> import <module_name> as <alt_name> The dir() Function Executing a Module as a Script Reloading a Module Python...