ImportError: No module named 'custom function'

Phenomenon: Use the command line to run a file in the package, and an error similar to the following will appear

$ python tests/test_utils.py
Traceback (most recent call last):  File "tests/test_utils.py", line 7, in <module>    from run_api import appImportError: No module named 'run_api'

Solution: Add the program root directory to the variablePYTHONPATH

# 进入到程序根目录$ export PYTHONPATH=.# windows 环境执行：set PYTHONPATH=.
# 然后执行相关命令$ python tests/test_utils.py

Transcoding is abnormal in some cases in Windows environment

Phenomenon: CMD under Windows executes normally, but executes in the console provided by the third-party system and reports an error similar to the following

  UnicodeEncodeError
  'gbk' codec can't encode character '\xa0' in position 22: illegal multibyte sequence
  at F:\Program Files\Python39\lib\site-packages\clikit\io\output_stream\stream_output_stream.py:24 in write       20│         """       21│         if self.is_closed():       22│             raise io.UnsupportedOperation("Cannot write to a closed input.")       23│     →  24│         self._stream.write(string)       25│         self._stream.flush()       26│        27│     def flush(self):  # type: () -> None       28│

Workaround: Configure the variable before executing the commandPYTHONIOENCODING=utf-8 

# 进入到程序根目录$ PYTHONIOENCODING=utf-8# windows 环境执行：set PYTHONIOENCODING=utf-8
# 然后执行相关命令$ poetry help

Use the module operate svn to report an authentication failure errorsubprocess

Phenomenon: There is no problem in directly using the command line to operate svn, but when using python to operate the svn command, an error similar to the following is reported

svn: E215004: No more credentials or we tried too many times.Authentication failed

Workaround: use the parameter--username --password --no-auth-cache


Use shutil.rmtree to delete directory report permission error under Windows

Phenomenon: The execution has an error similar to the followingshutil.rmtree(path)

WindowsError: [Error 5] Access is denied: 'build\\tcl\\tcl8.5\\msgs\\af.msg'

The general situation is because the file has a read-only attribute, the solution: add the onerror method

import osimport statimport shutil
def remove_readonly(func, path, excinfo):    os.chmod(path, stat.S_IWRITE)    func(path)
shutil.rmtree(top, onerror=remove_readonly)

Batch remove read-only attribute of directories under Windows

def remove_windows_readonly(path: Union[str, list]):    if isinstance(path, str):        path = [path]    if isinstance(path, list):        for i in path:            subprocess.run(f"attrib -R {i}/* /S /D")

If the function decorated by the decorator has a return value, it must be returned on the decorator at the same time, otherwise the subsequent call to the function will not be able to obtain the return value