``` # Python script to resize and crop images from PIL import Image def resize_image(input_path, output_path, width, height): image = Image.open(input_path) resized_image = image.resize((width, height), Image.A
请注意,在将其添加到共享队列之前,我们将输出格式化为字典项{ip:<command_output>},并使用mp_queue.put()将其添加到共享队列中。 在进程完成执行并加入主(父)进程之后,我们使用mp_queue.get()来检索结果列表中的队列项,然后使用pprint来漂亮地打印输出。 概要 在本章中,我们学习了 Python 多进程库以及如何实例...
os.system(command)返回命令执行状态码,而将命令执行结果输出到屏幕; os.popen(command).read() 可以获取命令执行结果,但是无法获取命令执行状态码; commands.getstatusoutput(command) 返回一个元组(命令执行状态码, 命令执行结果); os.popen(command)函数得到的是一个文件对象,因此除了read()方法外还支持write()等...
Execute shell commands via os.popen()and return status, output. Interface summary: import commands outtext= commands.getoutput(cmd) (exitstatus, outtext)= commands.getstatusoutput(cmd) outtext= commands.getstatus(file)# returns output of "ls -ld file" A trailing newlineis removedfrom the ou...
12.4 commands.getoutput() 在子进程中执行文件, 以字符串返回所有的输出.12.5 subprocess.call() 创建subprocess的便捷函数. Popen等待命令完成, 然后返回状态代码; 与os.system类型, 但更灵活.13 结束执行: 结束执行通常是程序执行完毕, 另外一种情况是使用异常处理来结束程序的运行. 还有一种方法就是建造一个...
output: a c Git代码版本管理 git stash = shelve = stage = git add,是把改动放到staging(做snapshot),然后可以只commit这部分的改动 Save changes to branch A. Rungit stash. Check out branch B. Fix the bug in branch B. Commit and (optionally) push to remote. ...
defstream_output(command):process=subprocess.Popen(command,stdout=subprocess.PIPE,shell=True,text=True)whileTrue:output=process.stdout.readline()ifoutput==''and process.poll()is not None:breakifoutput:print(output.strip())rc=process.poll()print(f"命令完成,退出码: {rc}")stream_output('ping ww...
```# Python script to resize and crop imagesfromPILimportImagedefresize_image(input_path, output_path, width, height):image = Image.open(input_path)resized_image = image.resize((width, height), Image.ANTIALIAS)resized_image.sav...
If the failure persists and appears to be a problem with Python rather than your environment, you canfile a bug reportand include relevant output from that command to show the issue. SeeRunning & Writing Testsfor more on running tests. ...
``` # Python script to resize and crop images from PIL import Image def resize_image(input_path, output_path, width, height): image = Image.open(input_path) resized_image = image.resize((width, height), Image.ANTIALIAS) resized_image.save(output_path) def crop_image(input_path, output...