When you did this, its name was set to __main__, which means that relative imports within it will fail, because its name does not reveal that it is in a package. Note that this will also happen if you run Python from the same directory where a module is, and then try to import ...
os.getcwd()表明当前wd确实在p1,这时候 无论是 from p2 import 还是import p2都是不行的,因为此时,无论是working directory 还是search path,都没有p2 一个解决方法是在search path里加入可以找到p2的路径 append('..')之后search path加入了上级路径,在这里是package,包含p2,因此可以找到p2,再从p2里找到test2...
且针对同一个模块很import多次,为了防止你重复导入,python的优化手段是:第一次导入后就将模块名加载到内存了,后续的import语句仅是对已经加载到内存中的模块对象增加了一次引用,不会重新执行模块内的语句),如下#test.pyimportspam#只在第一次导入
from .foo import foo 执行时候报错 ImportError:attempted relative import with no known parent package 把.去掉,同时把foo.py的目录添加到PYTHONPATH中即可 解释:把.去掉那么就不是导package了,而是导入module,解析器搜索module的默认目录在sys.path变量里面,sys.path变量默认被初始化成 build-in The directory con...
print(f"Working directory: {Path.cwd()}")# sameasos.getcwd()# Working directory:/home/martin/some/path Path.mkdir(Path.cwd()/"new_dir",exist_ok=True)# sameasos.makedirs()print(Path("README.md").resolve())# sameasos.path.abspath()#/home/martin/some/path/README.mdprint(Path.home(...
importnumpyasnpdeftest(a):a[0]=np.nanm=[1,2,3]test(m)print(m) output: [nan, 2, 3] Note python has this really weird error if you define local variable in a function same name as the global variable, program will promptUnboundLocalError. ...
3. Absolute Imports with Package Name 4. Importing a Module as an Object 5. Summary and Conclusion Related Articles 1. Relative Imports We can use relative imports to import modules from packages that are in the same directory or a subdirectory of the current module. Relative imports are speci...
Importing module from a package In Python, we can import modules from packages using the dot (.) operator. For example, if we want to import thestartmodule in the above example, it can be done as follows: importGame.Level.start
A Python library is a coherent collection of Python modules that is organized as a Python package. In general, that means that all modules live under the same directory and that this directory is on the Python search path. Make your best work yet ...
You can also import Python code as a package. The following code snippet from a DLT notebook imports the test_utils package from the dlt_packages directory inside the same directory as the notebook. The dlt_packages directory contains the files test_utils.py and __init__.py, and test_...