shutil.rmtree() is a function in Python that recursively deletes the entire directory tree. It can delete specified folders and all contents. 1. Basic usage: Use shutil.rmtree(path) to delete the directory, and you need to handle FileNotFoundError, PermissionError and other exceptions. 2. Practical application: You can clear folders containing subdirectories and files in one click, such as temporary data or cached directories. 3. Notes: The deletion operation is not restored; FileNotFoundError is thrown when the path does not exist; it may fail due to permissions or file occupation. 4. Optional parameters: Errors can be ignored by ignore_errors=True

Install the corresponding database driver; 2. Use connect() to connect to the database; 3. Create a cursor object; 4. Use execute() or executemany() to execute SQL and use parameterized query to prevent injection; 5. Use fetchall(), etc. to obtain results; 6. Commit() is required after modification; 7. Finally, close the connection or use a context manager to automatically handle it; the complete process ensures that SQL operations are safe and efficient.

Use multiprocessing.Queue to safely pass data between multiple processes, suitable for scenarios of multiple producers and consumers; 2. Use multiprocessing.Pipe to achieve bidirectional high-speed communication between two processes, but only for two-point connections; 3. Use Value and Array to store simple data types in shared memory, and need to be used with Lock to avoid competition conditions; 4. Use Manager to share complex data structures such as lists and dictionaries, which are highly flexible but have low performance, and are suitable for scenarios with complex shared states; appropriate methods should be selected based on data size, performance requirements and complexity. Queue and Manager are most suitable for beginners.

Identifying and exploring potential assets in the crypto field requires a four-step method: 1. Capture market signals such as social media topic growth rate, growth of ecological interaction address number, and mainstream platform search index; 2. Verify fundamentals such as team background, rationality of token model, and distribution of on-chain coin address; 3. Combined with technical indicators such as weekly breakthroughs in key resistance levels, trading volume exceeds 3 times per month, and RSI is in the 40-60 range; 4. Establish a continuous tracking mechanism for data dashboard monitoring, project milestone reminders and development progress review, and beware of traps such as abnormal promotion, liquidity pool imbalance and lack of technical documents, and optimize decision-making through small-scale testing, establishing tracking lists and retaining 20% cash reserves, and ultimately relying on in-depth research rather than chasing hot spots to achieve long-term success.

Toamendthemostrecentcommitmessage,usegitcommit--amend-m"Yournewcommitmessage"ifthecommithasn’tbeenpushed;thisrewritesthelocalcommithistorywiththenewmessage.2.Toeditthemessageinyourdefaulteditor,rungitcommit--amendwithoutthe-mflag,allowingyo

Use boto3 to upload files to S3 to install boto3 first and configure AWS credentials; 2. Create a client through boto3.client('s3') and call the upload_file() method to upload local files; 3. You can specify s3_key as the target path, and use the local file name if it is not specified; 4. Exceptions such as FileNotFoundError, NoCredentialsError and ClientError should be handled; 5. ACL, ContentType, StorageClass and Metadata can be set through the ExtraArgs parameter; 6. For memory data, you can use BytesIO to create words

If you mistakenly add files to the temporary storage area in Git, you can use the gitrestore--staged or gitreset command to undo the operation. 1. To cancel the temporary storage of a single file, you can run gitrestore-staged file name or gitresetHEAD file name; 2. To cancel the temporary storage of all files at once, you can run gitrestore-staged. or gitreset; 3. If you have already submitted, you need to use gitreset-mixedHEAD~1 to undo the submission and keep the changes; 4. If you want to discard changes in the temporary storage and working directory at the same time, you can run gitrestore-staged-work

PythonlistScani ImplementationAking append () Penouspop () Popopoperations.1.UseAppend () Two -Belief StotetopoftHestack.2.UseP OP () ToremoveAndreturnthetop element, EnsuringTocheckiftHestackisnotemptoavoidindexError.3.Pekattehatopelementwithstack [-1] on