python - How to select multiple fields in postgresql and only deduplicate one of the fields

Select distinct name, age returns columns with different names and ages. I want to get results like lily 23pet...

From [Pythondiscussion group] 2017-05-24 11:35:12 0  1  1125

Python global variable release?

Global variables need to be used in the project to store a large amount of data. This project will generally n...

From [Pythondiscussion group] 2017-05-24 11:35:10 0  2  666

Why is it recommended to use isinstance instead of type for instance checking in python?

http://codingpy.com/article/p... Instance check: Use isinstance(a, C) instead of type(a) is C`. But generally ...

From [Pythondiscussion group] 2017-05-24 11:35:09 0  2  869

python - pandas groups by column A and column B, and averages column C. How to generate a dataframe of columns A, B, and C?

{Code...} This groups df, but how to turn df into a dataframe with columns A, B, and C? Thanks

From [Pythondiscussion group] 2017-05-24 11:35:08 0  2  799

After writing the python module, how to write the documentation?

I'm a newbie and have never published a python program before. Recently, the teacher asked me to write two sma...

From [Pythondiscussion group] 2017-05-24 11:35:07 0  3  634

python3.x - python lxml cannot find the text of sub-tags whose first tag has a link and does not have a content tag?

The first situation: there is a link in the tag {code...} The second situation: the tag above the requested te...

From [Pythondiscussion group] 2017-05-24 11:35:06 0  1  595

python - When writing a crawler, there is no csrf token in the source code. How to obtain it?

When writing a crawler to crawl AliExpress, I saw the csrf token in NTEWROK's POST, but how do I get the csrf ...

From [Pythondiscussion group] 2017-05-24 11:35:05 0  2  806

Python pyinstaller fails to run on other computers after packaging

OS: win7 64-bit Python: 3.5.3 32-bit pyinstaller: 3.2.1 Package a program written in pyqt5 using the -Fw and -...

From [Pythondiscussion group] 2017-05-24 11:35:04 0  2  1144

python - tweepy library connects to Twitter API and reports errors

Environment: python 2.7.10 tweepy:3.5.0 Error: tweepy.error.TweepError: Failed to send request: [SSL: UNKNOWN_...

From [Pythondiscussion group] 2017-05-24 11:35:03 0  1  914

Equivalent writing of code.co_kwonlyargcount in Python2

Suppose there is a piece of code like this: {code...} For Python3, we can get the keyword argument to be 0 thr...

From [Pythondiscussion group] 2017-05-24 11:35:02 0  2  676

Basic questions for python beginners about while loop

Title: Use python to print all even numbers within 100. The first code section: {code...} Code execution resul...

From [Pythondiscussion group] 2017-05-24 11:35:01 0  2  513

Regular expression - python regular matching cookie problem in http package

Please ask how to use python regular or shell regular to match the cookie value in the http package {code...} ...

From [Pythondiscussion group] 2017-05-24 11:35:00 0  1  658

python3.x - python3.5 uses pyinstaller to package and reports an error that libpython3.5mu.so.1.0 and other files cannot be found. Solution?

I got an error when trying to use pyinstaller to package a python program on a Linux host. The important infor...

From [Pythondiscussion group] 2017-05-24 11:34:59 0  1  1383

requests - Questions about downloading files in Python

After clicking the download button on the "http://www.chinadrugtrials.or..." page, a DOC file will b...

From [Pythondiscussion group] 2017-05-24 11:34:58 0  1  717

python - Problem about saving the return information of paramiko's stdout.read() to txt

The return text of the sentence self.rz.setText(str(stdout.read())) is as shown in the figure: there is a newl...

From [Pythondiscussion group] 2017-05-24 11:34:54 0  1  818