python2.7 - Execution order of python function or class code

The question has been modified. Let’s look at Example 3 first. For simple control statements, {code...} We all...

From [Pythondiscussion group] 2017-06-12 09:25:49 0  1  874

python - matplotlib pie how to set alpha

matplotlib.pyplot.bar has the alpha parameter, but it seems that an error will be reported when using it in pi...

From [Pythondiscussion group] 2017-06-12 09:25:48 0  1  1153

Artificial Intelligence - python machine learning medical data how to learn

There is a recent project that involves the analysis and deep learning of medical data. It requires the use of...

From [Pythondiscussion group] 2017-06-12 09:25:45 0  1  1123

python - When calling a method polymorphically, bound method is displayed...

class Programer(object): {code...} class BackendProgramer(Programer): {code...} def intro(f): {code...} if __n...

From [Pythondiscussion group] 2017-06-12 09:25:43 0  1  958

python - How to combine data from two different pages in scrapy and store them together

1 For example, there is a blog list page a, to get the article list 2 and a blog content details page b, to ge...

From [Pythondiscussion group] 2017-06-12 09:25:36 0  1  894

python - About global variables in Flask

Q: I watched a simple tutorial on Flask, but there is a question I don’t understand. Will the global variables...

From [Pythondiscussion group] 2017-06-12 09:25:35 0  1  1160

python3.x - When using pymysql to insert data in python, an error occurs when the data is an alphabetic string.

In python3, pymysql is used to insert data. The code is as follows {code...} and the result is the following e...

From [Pythondiscussion group] 2017-06-12 09:25:33 0  1  1126

Push messages - Is there any third-party service provider for cloud push with python interface? ?

I need a free third-party push service platform that can provide python interfaces and documentation. Please r...

From [Pythondiscussion group] 2017-06-12 09:25:31 0  4  946

python-pyqt multi-threading problem is really not very clear. . Solve. .

{Code...} The error message is as follows: `QObject: Cannot create children for a parent that is in a differen...

From [Pythondiscussion group] 2017-06-12 09:25:21 0  2  1031

python - Error when using login_user in flask-login?

flask-login is used for login verification in flask. The following is the User model: {code...} This is the fo...

From [Pythondiscussion group] 2017-06-12 09:25:19 0  1  1024

Jinja2 template syntax macro error - Stack Overflow

{Code...} Macros are used in the jinja2 template syntax, but an error is reported. The problem is that the nam...

From [Pythondiscussion group] 2017-06-12 09:25:17 0  1  1008

python - openpyxl reads xlsx files and generates data into a dictionary. Is there a problem with Chinese encoding?

The following code implements reading the data in 1.XLSX, saving all the data in the dictionary my_data, and t...

From [Pythondiscussion group] 2017-06-12 09:25:15 0  2  1274

python - Get just inserted data id in sqlalchemy?

{Code...} How to get the id of the data just inserted? ps:q_insert returns <sqlalchemy.engine.base.Resu...

From [Pythondiscussion group] 2017-06-12 09:25:12 0  2  1194

Using python3's smtplib library to send emails keeps returning the message that the email cannot be sent. What is the reason?

According to the online tutorial for sending emails using Python 3, when running Jupyter, a message indicating...

From [Pythondiscussion group] 2017-06-12 09:25:11 0  2  1114

May I ask why in Python, when I use a for loop to assign a value to a nested list, it is always calculated based on the final value of i?

There are two examples, the first one is as follows, {code...} At this time, a=[3,4,5,6,7] and the second one ...

From [Pythondiscussion group] 2017-06-12 09:25:09 0  3  1013