Re: PVA Client in python

[Siniša Veseli via Tech-talk <tech-talk@aps.anl.gov>]

Okay. Python version < 3.6 is not a requirement, I simply did not build 
pvapy for 3.5.

On 6/18/19 7:47 AM, Florian Feldbauer via Tech-talk wrote:
> Hey,
>
> as I wrote in my firsts mail: I'm running Debian stretch (64 bit). The 
> version of python3 from the apt-repositories is 3.5
>
>> ~ > uname -a
>> Linux lenovoT450s 4.9.0-9-amd64 #1 SMP Debian 4.9.168-1+deb9u2 
>> (2019-05-13) x86_64 GNU/Linux
>> ~ > python3 -c "import sys; print(sys.version_info)"
>> sys.version_info(major=3, minor=5, micro=3, releaselevel='final', 
>> serial=0)
>
> If the requirement is python3.6, it is clear why it is not working on 
> my system.
> But p4p works for me!
>
> Cheers,
> Florian
>
> On 6/18/19 2:43 PM, Siniša Veseli via Tech-talk wrote:
>> Okay, you either have 32-bit machine or python version lower than 3.6.
>>
>> If you send me the output of the following two commands, I will build
>> the packages for your platform:
>>
>> uname -a
>>
>> python -c "import sys; print(sys.version_info)"
>>
>> Thanks,
>>
>> Sinisa
>>
>>
>> On 6/18/19 1:53 AM, Florian Feldbauer via Tech-talk wrote:
>>> Hey,
>>>
>>> here is the output of `pip3 install -v pvapy` on my system:
>>>
>>> The error is "Could not find a version that satisfies the requirement
>>> pvapy (from versions: )"
>>>
>>> Cheers,
>>> Florian
>>>
>>>> ~ > pip3 install -v pvapy
>>>> Converted retries value: Retry(total=5, connect=None, read=None,
>>>> redirect=None) -> Retry(total=Retry(total=5, connect=None, read=None,
>>>> redirect=None), connect=None, read=None, redirect=None)
>>>> Converted retries value: Retry(total=5, connect=None, read=None,
>>>> redirect=None) -> Retry(total=Retry(total=5, connect=None, read=None,
>>>> redirect=None), connect=None, read=None, redirect=None)
>>>> Collecting pvapy
>>>>    1 location(s) to search for versions of pvapy:
>>>>    * https://pypi.python.org/simple/pvapy/
>>>>    Getting page https://pypi.python.org/simple/pvapy/
>>>>    Looking up "https://pypi.python.org/simple/pvapy/"; in the cache
>>>>    Returning cached "301 Moved Permanently" response (ignoring date
>>>> and etag information)
>>>>    Looking up "https://pypi.org/simple/pvapy/"; in the cache
>>>>    Current age based on date: 22
>>>>    Freshness lifetime from max-age: 600
>>>>    Freshness lifetime from request max-age: 600
>>>>    The response is "fresh", returning cached response
>>>>    600 > 22
>>>>    Analyzing links from page https://pypi.org/simple/pvapy/
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/90/4c/070a0ac1fac05426e32b839b6e1f2a8e8e2c4fc7e458c18be59d2ad3bd67/pvapy-1.3.0-cp27-cp27m-manylinux1_x86_64.whl#sha256=166092f770797f205de2ab74dff00d79131abde3608096809161ea07094be74f 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/a3/77/99ecd2ccc5939019759bbd5020c0053b3fa43fbf1c9b35f098ed11c6a52d/pvapy-1.3.0-cp27-cp27mu-manylinux1_x86_64.whl#sha256=c4318e0b3c89d906e844ffe0f83ece16d660dffc02ac5289a407441016a8405e 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/63/1e/dccb319a575b2979244525f0756ffaaaf580c0551411cf346fb027a5b5c3/pvapy-1.3.0-cp36-cp36m-manylinux1_x86_64.whl#sha256=90db333adb7c284a1057b26e51ffb852bac1bf21c44b08e5b225535f602f9fae 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/59/74/e1073af9f9f3198862614d31ddc74ab6d591c234ad9e8e47e95fe82ae0da/pvapy-1.3.0-cp37-cp37m-manylinux1_x86_64.whl#sha256=4f57e0c74a7c572e09602ebbac4a58a18e636fc338413eac27292bad09cb3d18 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/00/27/19d4d68a5c0bac0cee099851308146e688d95f2b19878c2637390783f80c/pvapy-1.4.0-cp27-cp27m-manylinux1_x86_64.whl#sha256=1bfdf2d6748acc502fc7da4b48925192986c66a48e7713587d9452a74ff385d4 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/00/ea/d9efb150ca7d00df06458578ad8c662dc9486bf7f05efbe068cb287755e6/pvapy-1.4.0-cp27-cp27mu-manylinux1_x86_64.whl#sha256=6013f8ea4c4ba6f862fbca918584dfdcdc041b7ebd7da56b49ee379c94edb90a 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/f1/63/1aa389e9c915601ef11d2458d4fa081b9146313606ca32cbeb3c30268505/pvapy-1.4.0-cp36-cp36m-manylinux1_x86_64.whl#sha256=39070ce21e3be14078c6e764d6219bce6ef73d0620719e8462a24272b97490b5 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/0d/75/ab1e3f73982837dd411e660860c301af8d1781503b5206a802e8867f35c4/pvapy-1.4.0-cp37-cp37m-manylinux1_x86_64.whl#sha256=53bbcd129ef9890908ca8fa7f7f1051731befeea04450802c3110ce3c50baffd 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/02/cc/7dc95ad0c8d07ba83bda7bf81e7a912e274fdb1afb4d553bf0f4633d7bb3/pvapy-1.5.0-cp27-cp27m-manylinux1_x86_64.whl#sha256=b0c29e50d28f071a19c22ec2545f8f1dfd0918a8965f599eb8e0c5b5f2394527 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/bd/e2/0f9538a1aac48f9aee38218c7e4d40625579acee45dfbbfc3eb281a4f0cb/pvapy-1.5.0-cp27-cp27mu-manylinux1_x86_64.whl#sha256=c87467ed278cdae7ecaffc710c99e37be05683a0c5948e7802fbfb97ad0885c6 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/3c/8d/be0183a7f2177e81bee3c8b362aabbc236e3d1e8fd825da613856b5c28bc/pvapy-1.5.0-cp36-cp36m-manylinux1_x86_64.whl#sha256=a0597bd0278e578eae425daf01a92d38e05a945b03e8121bf0e4e930cd492d00 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/a3/d9/26a1a069a02ef22dd9690231a6d7795ef2678540f1e6b311db26ae94ca69/pvapy-1.5.0-cp37-cp37m-manylinux1_x86_64.whl#sha256=dac2587f1fc48b08bd41fae994e44feffe70884dfb148303743875258b743666 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/a3/4a/13f1eaba6ab2278563574213ad660e0108a91b8c9947eedf5dead0531994/pvapy-1.6.0-cp27-cp27m-manylinux1_x86_64.whl#sha256=58a9b9ad5ef4ba31d35dabffb5ab0c3803e9615393c3c9dfc211d9bc11e28cf8 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/1f/60/1aba5817709aa14589b8ac61f7c8aa75693e6ee00bf24b6d02a7f6296aea/pvapy-1.6.0-cp27-cp27mu-manylinux1_x86_64.whl#sha256=92a5fde532ba80a76c0e6fe398bd89aadaa5136b8982c11f285eec066b572d1d 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/39/41/9672263b80b3d107ca5a6e530d216393537e6346c31cb4a69d84bbb3299d/pvapy-1.6.0-cp36-cp36m-manylinux1_x86_64.whl#sha256=ff7be7169e787d10d08bc1eb2bd4b419fdd8514fc49fdfa0b0daa1022b8a8e95 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>      Skipping link
>>>> https://files.pythonhosted.org/packages/58/f5/00699c4ecf95d9ac9313496fd3dc19370fc73c36a69d9243d5c500f9fec8/pvapy-1.6.0-cp37-cp37m-manylinux1_x86_64.whl#sha256=4041b11d2cdd024357ab9313f38d8197c8c43f8c88dc7491e624d6401e62b181 
>>>>
>>>> (from https://pypi.org/simple/pvapy/); it is not compatible with this
>>>> Python
>>>>    Could not find a version that satisfies the requirement pvapy (from
>>>> versions: )
>>>> Cleaning up...
>>>> No matching distribution found for pvapy
>>>> Exception information:
>>>> Traceback (most recent call last):
>>>>    File "/usr/lib/python3/dist-packages/pip/basecommand.py", line 215,
>>>> in main
>>>>      status = self.run(options, args)
>>>>    File "/usr/lib/python3/dist-packages/pip/commands/install.py", line
>>>> 353, in run
>>>>      wb.build(autobuilding=True)
>>>>    File "/usr/lib/python3/dist-packages/pip/wheel.py", line 749, in 
>>>> build
>>>>      self.requirement_set.prepare_files(self.finder)
>>>>    File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 380,
>>>> in prepare_files
>>>>      ignore_dependencies=self.ignore_dependencies))
>>>>    File "/usr/lib/python3/dist-packages/pip/req/req_set.py", line 554,
>>>> in _prepare_file
>>>>      require_hashes
>>>>    File "/usr/lib/python3/dist-packages/pip/req/req_install.py", line
>>>> 278, in populate_link
>>>>      self.link = finder.find_requirement(self, upgrade)
>>>>    File "/usr/lib/python3/dist-packages/pip/index.py", line 514, in
>>>> find_requirement
>>>>      'No matching distribution found for %s' % req
>>>> pip.exceptions.DistributionNotFound: No matching distribution found
>>>> for pvapy
>>> On 6/17/19 9:58 PM, Siniša Veseli via Tech-talk wrote:
>>>> Hello,
>>>>
>>>> The "pvaccess" python module is part of pvapy, which you should be 
>>>> able
>>>> to get via conda or pip.
>>>>
>>>> What was the problem with your pvapy pip install?
>>>>
>>>> Thanks,
>>>>
>>>> Sinisa
>>>>
>>>> On 6/17/19 12:05 PM, Florian Feldbauer via Tech-talk wrote:
>>>>> Hey Kay and David,
>>>>>
>>>>> during the EPICS7 training at the collaboration meeting, we were 
>>>>> using
>>>>> a PVA client written in python.
>>>>> This client imports the module "pvaccess".
>>>>>
>>>>> For a small project I wanted to write my own PVA client in python, 
>>>>> but
>>>>> I cannot find this library.
>>>>> Using `pip search pvaccess` I found a module called p4p 
>>>>> (maintained by
>>>>> David?) instead.
>>>>> Googeling I found also pvapy which I could not install via pip.
>>>>>
>>>>> Are there any recommendations which module to use?
>>>>>
>>>>> In case it matters: My environment is Debian Stretch with Base 
>>>>> 7.0.2.2.
>>>>>
>>>>> Best regards,
>>>>> Florian
>>>>>
-- 
Siniša Veseli
Scientific Software Engineering & Data Management
Advanced Photon Source
Argonne National Laboratory
sveseli@anl.gov
(630)252-9182