Python sets a value change statement, why doesn't it work?

I want to set some data in the file to the original value, and set the missing value to 0, but the final resul...

From [Pythondiscussion group] 2017-06-28 09:25:55 0  1  859

python - pycharm is installed with ideavim. After selecting it, pressing the delete key in the upper right corner changes to the ← key and cannot be deleted.

After selecting a piece of code, pressing the delete key will not delete it, but move it one position to the l...

From [Pythondiscussion group] 2017-06-28 09:25:52 0  2  1481

python - Scrapy's spider is convenient for running and debugging in the IDE

I have many spiders, so I can’t manually create a debugger (scrapy crawl spider_name) every time I debug. I th...

From [Pythondiscussion group] 2017-06-28 09:25:49 0  2  1336

python - How to use a crawler to crawl images from web pages in batches?

As shown in the picture, it is troublesome to view and load pictures through the network and right-click to sa...

From [Pythondiscussion group] 2017-06-28 09:25:48 0  3  1250

python3.x - Why can't python find the module even after setting the .pth file?

My python is version 3.5.2. I have a helloworld.py module, which has a show function that outputs "Hello ...

From [Pythondiscussion group] 2017-06-28 09:25:47 0  2  1080

python - There is not much data in each row, but the overall data has 7303 rows. When reading each row, why is the display too large?

Why is Too Big to print? original data displayed during debugging?

From [Pythondiscussion group] 2017-06-28 09:25:44 0  1  1095

python - Questions about crawling images?

Today's crawlers generally parse images from HTML, but the problem is that some image paths are written in JS....

From [Pythondiscussion group] 2017-06-28 09:25:40 0  2  1085

Web crawler - python crawler, the data to be crawled is not in the source code of the web page, how to deal with it?

I want to capture the scores of live broadcast events: live broadcast links, but I can only capture the date, ...

From [Pythondiscussion group] 2017-06-28 09:25:38 0  2  1930

python - How to change a text file's CR newlines to LF newlines?

How to change the CR newline character of a text file to the LF newline character

From [Pythondiscussion group] 2017-06-28 09:25:37 0  2  1453

Python gets the status code of the HTTP request (200, 404, etc.)

Python gets the status code of the HTTP request (200, 404, etc.) without accessing the entire page source code...

From [Pythondiscussion group] 2017-06-28 09:25:31 0  2  1186

file - Python how to read the file content and write it back to the original file after modification

How Python reads the file content and writes it back to the original file after modification

From [Pythondiscussion group] 2017-06-28 09:25:30 0  1  1278

python - Is there any way to get all the links in the network when the browser opens the web page?

Is there any way?

From [Pythondiscussion group] 2017-06-28 09:25:29 0  1  1029

How to count the number of files in a certain folder in Python

I have a folder /tmp, how do I know the number of files under it {code...} The result is all the files and fol...

From [Pythondiscussion group] 2017-06-28 09:25:27 0  1  1216

python - response about restful api

I just started to get involved with the web, and I don’t know much about common sense. Want to ask. An API onl...

From [Pythondiscussion group] 2017-06-28 09:25:24 0  5  967

macos - cannot source activate python27 - Stack Overflow

I used conda to install version 2.7 of Python (the original version was version 3.6), but when I used source a...

From [Pythondiscussion group] 2017-06-28 09:25:21 0  1  1458