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python - Scrapy uses xpath to report errors in Chinese

Problem Description {Code...} Error: ValueError: All strings must be XML compatible: Unicode or ASCII, no NULL...

From [Pythondiscussion group] 2017-06-30 09:55:44 0  2  1582

Function in python for loop can only be run once?

{code...}

From [Pythondiscussion group] 2017-06-30 09:55:41 0  2  1186

dict - Error when writing dic to txt in Python: a bytes-like object is required, not 'str'

{Code...} PyCharm runs and reports the following error: {Code...} Traceback (most recent call last):File "...

From [Pythondiscussion group] 2017-06-30 09:55:31 0  2  1680

python - How to add multiple database support in flask and display the query results on the page in a table?

As shown in the picture, what I want to achieve is the effect as shown above. Select different databases throu...

From [Pythondiscussion group] 2017-06-30 09:55:24 0  1  1137

python - Django encountered problems operating the database and could not query the updated data

I changed the attribute of question_text and saved it, then added the __str__() method and then queried all Qu...

From [Pythondiscussion group] 2017-06-30 09:55:15 0  2  979

PC access has become a mobile address problem#python#scrapy

Use scrapy to crawl Himalaya and crawl the PC address. The response of the entry link is fine, but the subsequ...

From [Pythondiscussion group] 2017-06-30 09:55:13 0  2  1190

python - scrapy captures duplicate content of CNKI response

Traversing the url {code...} that requests page turning, the response request is successful, but the content i...

From [Pythondiscussion group] 2017-06-30 09:55:07 0  3  1069

[Python Newbie] Asked about importing nested packages

Let’s first look at the directory structure of my package: The outermost package is named Msgnew, which contai...

From [Pythondiscussion group] 2017-06-30 09:54:57 0  2  916

python - How to do port monitoring.

Windows, how to do something similar to phpstudy. If the port is killed, the light will turn red... If the por...

From [Pythondiscussion group] 2017-06-30 09:54:51 0  1  1182

Python - How to match each word of a text to a word in another text and the value corresponding to that word?

Text ttt.txt content: president said would bill program loan farmers corn committee department agriculture usd...

From [Pythondiscussion group] 2017-06-30 09:54:38 0  1  1192

python - If I need to display other fields on the Django page, should I change the data table structure and add a field? Or search and add it in the view function, and then display it in tem.

If I need to display other fields on the Django page, should I change the data table structure and add a field...

From [Pythondiscussion group] 2017-06-30 09:54:23 0  1  1184

Python determines whether strings are equal?

Aren't word and key equal? Why not perform the print operation and jump directly to the superposition of i?

From [Pythondiscussion group] 2017-06-30 09:54:18 0  3  1218

python - Why can't I update the css in real time after writing it in flask?

The css code has been modified, but when I run the program and check the source code css content it is still a...

From [Pythondiscussion group] 2017-06-30 09:54:12 0  3  1311

What are some successful projects with Django?

Currently, one of the most successful projects using Django is Instagram, with 5 engineers leading 100 million...

From [Pythondiscussion group] 2017-06-30 09:54:00 0  3  1092

python - I often see the following style when using Pycharm. What does the red part in the parentheses mean?

As shown in the figure below: Why are uid_type and uid red?

From [Pythondiscussion group] 2017-06-30 09:53:47 0  2  1714