您好，我想咨询阅读python语言参考手册时遇到的相关问题，
我在这个网址https://docs.python.org/zh-cn/3/bugs.html
看到该邮箱地址，不知道是否可以用来咨询此类问题？或请推荐咨询的渠道。
《python语言参考手册》--数据模型章节--静态方法对象：
“避免函数对象转换为方法对象”是指在实例对象在获取属性时，避免类中定义的方法（即：函数对象）转换为实例方法么？
为什么在python中，会设置这种在类中将用户定义的函数封装起来从而防止其转换为实例方法，这种封装一般应用在哪些情况下呢？
Hello, I would like to consult related issues encountered when reading the python language reference manual,
I am at this URL https://docs.python.org/zh-cn/3/bugs.html
Seeing the email address, I wonder if it can be used to consult such questions? Or please recommend a channel for consultation.
"Python Language Reference Manual"-Data Model Chapter-Static Method Object:
"Avoid converting function objects into method objects" refers to avoiding the methods defined in the class (ie: function objects) from being converted into instance methods when the instance object gets properties?
Why is it set up in python to encapsulate user-defined functions in a class to prevent them from being converted into instance methods? In what situations is this encapsulation generally used?
Hello -
I wish to bring to your kind notice a bug in Python.
Given any matrix X. While trying to compute the CoVariance matrix of that
matrix X, Python does NOT compute the CoVarianceof the given matrix X.
Instead, Python comptes the CoVariance of the Transpose of the given matrix
X.
This appears to be a bug in Python.
Please refer to the below website for a given matrix and what the result
should be after the computation of it's CoVariance. And I have provided a
screenshot of what Python is returning.
https://www.itl.nist.gov/div898/handbook/pmc/section5/pmc541.htm
Please let me know if you have any questions.
Regards,
Prakash
In section 6.4 of the tutorial:
Yet another variation is to import the desired function or variable directly:
fromsound.effects.echoimportechofilter
Again, this loads the submodule echo, but this makes its function echofilter() directly available
I think the last sentence of the describtion should be:
Again, this doesn't load the submodule echo, but this makes its function echofilter() directly available
Thanks and Best Regards,
Andy.
I was going through the "Logging Cookbook" article, following perfectly...
until the section entitled "Dealing with handlers that block" attributed to
writer Vinay Sajip <vinay_sajip at red-dove dot com>.
I skimmed his discussion and figured that I could look at the code to
figure out which imports that he did not include in the code because
everything was making perfect sense.
Apparently one of the imports required was the code snippet for a module
recently above... yet there is no link in the doc to take me to a simple
article explaining how to take a module code and create a import module in
the article.
Thus, the Logging Cookbook became immediately IRRELEVANT in being a
reference article without having experience or knowledge in creating Python
modules.
Yes, I am working on a complex project for myself. and am ramping up as
quickly as I can, yet with a total of about 3 years managing python scripts
similar to DOS BAT files, I have no experience creating importable modules
in Python.
Doing this complex project, I plan on designing MANY custom personal import
modules for myself, yet that has not become a required skill yet.
**Thus** to make the "Logging Cookbook** more useful, there should probably
be a link to a quick appendix article by Vijay describing how to create an
importable module from his long description about "Dealing with handlers
that block"... or after he presented the code for the module.
I still have a lot of the article to read and was REALLY enjoying the
coding knowledge that I was getting about the topic of logging... yet at
this point in the article, there is a MAJOR requirement in
knowledge which could be a simple appendix to the article, omitted from the
learning process.
Thank you for addressing this issue. I came to this Python document
"Logging Cookbook" from IDLE reading Python documentation, and doing a
search for "logging". I am not really sure if I am reading an online
article or a downloaded file with online links in the footer of the "help"
subsystem. Yet,, I am very disappointed that Vijay's awesome article has a
stopping point where I cannot use the information presented because I do
not possess the knowledge and am not directed to a place to get the
knowledge.
Thank you for your attention to this problem that only needs a short
appendix or attachment at the bottom of the article... or a link to
"Creating local/private Modules Cookbook. ;)
--
--
Barry Smith
c *in process*
c *unavailable* -> 864-999-9076
e bnsmith002(a)gmail.com
w1 https://bit.ly/3drRKmL
w2 http://bit.ly/l8QJup
logging.handlers.SMTPHandler only uses the 'secure' argument when credentials are specified. https://docs.python.org/3/library/logging.handlers.html#logging.handlers.SM… says:
"To specify the use of a secure protocol (TLS), pass in a tuple to the secure argument. This will only be used when authentication credentials are supplied."
The docstring confirms this, but I can't find an explanation of the intent behind this behaviour. Perhaps it would be a good idea to describe this as well.
Hello,
All the download links for python 3.8 (3.8.11) are returning 404. See :
https://docs.python.org/3.8/download.html .
It affects all formats and both packing methods.
I was able to get the documentation by manually changing the download URL
from 3.8.11 to 3.8.10.
To whom it may concern,
I was working with xml.dom.minidom to parse XML files but for memory usage
purposes (I'm currently working with ~10GB files) I had to change module
and I started using xml.dom.pulldom.
Since pulldom and minidom rely on the same data structures, the processing
functions used with minidom works perfectly also on the pulldom
implementation, but there's something wrong with pulldom behaviour.
As you can see below this is a simple for loop where I check the tagName
and proceed to get the attributes I want with the get_prjna function.
[image: code1.png]
[image: code2.png]
This function works perfectly with minidom, but with pulldom the data I get
are literally truncated. The first attribute in the first row is the key of
a dictionary and is in the format PRJ******, in the second row you can see
that the function just can't take a full string (taking only "PRJN"). This
happens
also with other data. The second element of the first row is in the format
"Illumina **Seq ****" and it's obvious that something is going wrong here,
because it just takes some truncated strings with random lenght. The last
element of the first row is "TRANSCRIPTOMIC" but again it takes incomplete
strings.
[image: result.png]
This is for make you understand how data are stored, in this example the
"PRJ******":
[image: source1.png]
And this is another data:
[image: source2.png]
Having used minidom until this morning, I can assure you that the *same* data
structure that you can see in the screen is well generated using minidom,
demonstrating that there's no trace of incomplete data.
I think this data loss happens when using the expandNode function, but I
just can't test it because the file are too large to print the content of
the expandend nodes.
To be as complete as possible, I tried something like:
if event == pulldom.START_ELEMENT and node.tagName == "STUDY" but this
error keeps happening.
Thanks in advance for the help and have a nice day!
