python-2.7

问题 I download the get-pip.py from https://pip.pypa.io/en/stable/installing/ . Then i changed path in: system-variable environment into : C:\Python27\ArcGIS10.3\Lib\site-packages after that i tried to run in from the cmd and this is the result: 回答1: For New versions Older versions of python may not have pip installed and get-pip will throw errors. Please update your python (2.7.15 as of Aug 12, 2018). All current versions have an option to install pip and add it to the path. Steps: Open

问题 i'm trying to increase/decrease the pitch(or speed) on a few .wav files in pydub. I tried using sound.set_frame_rate (i multiplied the original frame rate, but nothing changed). Does anyone know how this can be done? (preferably without downloading additional external libraries). thanks. 回答1: sound.set_frame_rate() does a conversion, it should not cause any "chipmunk effect", but what you can do is change the frame rate (without a conversion) and then convert the audio from there back to a

问题 i'm trying to increase/decrease the pitch(or speed) on a few .wav files in pydub. I tried using sound.set_frame_rate (i multiplied the original frame rate, but nothing changed). Does anyone know how this can be done? (preferably without downloading additional external libraries). thanks. 回答1: sound.set_frame_rate() does a conversion, it should not cause any "chipmunk effect", but what you can do is change the frame rate (without a conversion) and then convert the audio from there back to a

问题 i'm trying to increase/decrease the pitch(or speed) on a few .wav files in pydub. I tried using sound.set_frame_rate (i multiplied the original frame rate, but nothing changed). Does anyone know how this can be done? (preferably without downloading additional external libraries). thanks. 回答1: sound.set_frame_rate() does a conversion, it should not cause any "chipmunk effect", but what you can do is change the frame rate (without a conversion) and then convert the audio from there back to a

问题 I'm new to scrapy and I made the scrapy project to scrap data. I'm trying to scrapy the data from the website but I'm getting following error logs 2016-08-29 14:07:57 [scrapy] INFO: Enabled item pipelines: [] 2016-08-29 13:55:03 [scrapy] INFO: Spider opened 2016-08-29 13:55:03 [scrapy] INFO: Crawled 0 pages (at 0 pages/min),scraped 0 items (at 0 items/min) 2016-08-29 13:55:04 [scrapy] DEBUG: Crawled (403) <GET http://www.justdial.com/robots.txt> (referer: None) 2016-08-29 13:55:04 [scrapy]

问题 I'm new to scrapy and I made the scrapy project to scrap data. I'm trying to scrapy the data from the website but I'm getting following error logs 2016-08-29 14:07:57 [scrapy] INFO: Enabled item pipelines: [] 2016-08-29 13:55:03 [scrapy] INFO: Spider opened 2016-08-29 13:55:03 [scrapy] INFO: Crawled 0 pages (at 0 pages/min),scraped 0 items (at 0 items/min) 2016-08-29 13:55:04 [scrapy] DEBUG: Crawled (403) <GET http://www.justdial.com/robots.txt> (referer: None) 2016-08-29 13:55:04 [scrapy]

问题 I'm new to scrapy and I made the scrapy project to scrap data. I'm trying to scrapy the data from the website but I'm getting following error logs 2016-08-29 14:07:57 [scrapy] INFO: Enabled item pipelines: [] 2016-08-29 13:55:03 [scrapy] INFO: Spider opened 2016-08-29 13:55:03 [scrapy] INFO: Crawled 0 pages (at 0 pages/min),scraped 0 items (at 0 items/min) 2016-08-29 13:55:04 [scrapy] DEBUG: Crawled (403) <GET http://www.justdial.com/robots.txt> (referer: None) 2016-08-29 13:55:04 [scrapy]

问题 Say I want to loop from 0 to 100 but with a step of 1/2. If you try for i in range(0, 100, 0.5): whatever Error: the step must not be 0 Question: Is there any built-in way in Python 2.x to do something like this? 回答1: Python2.x: for idx in range(0, int(100 / 0.5)): print 0.5 * idx outputs: 0.0 0.5 1.0 1.5 .. 99.0 99.5 Numpy: numpy.arange would also do the trick. numpy.arange(0, 100, 0.5) 回答2: If you have numpy , here are two ways to do it: numpy.arange(0, 100, 0.5) numpy.linspace(0, 100, 200,

问题 I am getting error while installing grpcio using pip install grpcio on my windows machine.I read here - https://github.com/grpc/grpc/issues/17829 that it may be due to error in a version of setuptools. I upgraded my setuptools to the latest version i.e. 41.0.1 . Still getting the same build error. Its not happening for any other package. I have tried reinstalling pip and python both on my laptop. I'm attaching my error Building wheels for collected packages: grpcio Building wheel for grpcio

问题 I am getting error while installing grpcio using pip install grpcio on my windows machine.I read here - https://github.com/grpc/grpc/issues/17829 that it may be due to error in a version of setuptools. I upgraded my setuptools to the latest version i.e. 41.0.1 . Still getting the same build error. Its not happening for any other package. I have tried reinstalling pip and python both on my laptop. I'm attaching my error Building wheels for collected packages: grpcio Building wheel for grpcio