Web Reference: subprocess.Popen takes a cwd argument to set the Current Working Directory; you'll also want to escape your backslashes ('d:\\test\\local'), or use r'd:\test\local' so that the backslashes aren't interpreted as escape sequences by Python. Dec 18, 2025 · In this guide, we’ll demystify why this error occurs and show you how to fix it by explicitly setting the working directory for subprocesses. We’ll cover basics, advanced scenarios, troubleshooting, and best practices to ensure your dependent files are always found. 1 day ago · If cwd is not None, the function changes the working directory to cwd before executing the child. cwd can be a string, bytes or path-like object. On POSIX, the function looks for executable (or for the first item in args) relative to cwd if the executable path is a relative path.
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