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python - SQLAlchemy中模糊查詢，如何like多個關鍵字

比如需要找出u_name中既有“三”又有“貓”的記錄：SQL原生語句如下： {代碼...} 請問這個如何在 SQLAlchemy 中實現(xiàn)呢

From [Pythondiscussion group] 2017-04-17 17:53:02 0  2  1231

python中有沒有像java中的jstack命令

最近有個應用中用到了多線程執(zhí)行某個任務，但是程序有時候就不動，排查出原因就是開啟的新線程卡在哪里了，但是又不知道原因。在jvm中可以jstack pid導出當前進程的所有vm線程狀態(tài)，請問在python在有這個功能嗎，....

From [Pythondiscussion group] 2017-04-17 13:04:00 0  3  1231

python - Merge multiple lists into a dictionary

I have simplified the original problem and hope you can help me. I have 2 lists of equal length: idlist = [id1...

From [Pythondiscussion group] 2017-06-28 09:22:02 0  4  1228

Come help the children!

Create a dictionary by counting the frequency of words in "Simple is better than complex.Complex is bette...

From [Pythondiscussion group] 2020-04-22 09:42:26 0  1  1226

python - flask-sqlalchemy怎么操作postgresql中不同schema（默認是public）

1.現(xiàn)在我的postgresql中有多個schema現(xiàn)在使用sqlalchemy中URIpostgresql://postgres:111111@127.0.0.1:5432/db連接上的數(shù)據(jù)庫中默認是在public這個...

From [Pythondiscussion group] 2017-04-17 17:39:22 0  2  1225

Using TensorFlow to create a logistic regression model training results are nan

In TensorFlow, I want to create a logistic regression model with the following cost function: The screenshot o...

From [Pythondiscussion group] 2017-06-28 09:23:45 0  1  1224

python - Can I add specified modules using pyinstaller?

Now I only know that -F compresses the py script into one script. How to compress the entire directory into a ...

From [Pythondiscussion group] 2017-06-12 09:26:11 0  1  1224

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  1224

python - Using pip to install numpy shows satisfied. In the 2.6 sitepackage, how to install it separately for 2.7?

As the title says, every time I want to use centos, I use 2.7, but it turns out that 2.7 is not available, and...

From [Pythondiscussion group] 2017-06-12 09:22:46 0  4  1224

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  1223

python - Scrapy simulated login encounters 404 problem

I use Python to simulate logging into a website, but I keep encountering 404 problems. Please give me some gui...

From [Pythondiscussion group] 2017-05-18 11:01:22 0  1  1223

python - Does @property decorator affect check_password_hash?

Use flask to learn to make a blog. The code is as follows: {code...} When running, open the login page and ent...

From [Pythondiscussion group] 2017-05-18 11:01:09 0  2  1223

Algorithm - python ahocorasick reads text from a local file and performs keyword matching, but the matching fails

Use Python+pyahocorasick to match keywords, which are probably between 10-20 Chinese characters. The text used...

From [Pythondiscussion group] 2017-05-18 10:47:50 0  1  1223

python 如何實現(xiàn)并行查找關鍵字所在的行？

我有幾十萬個關鍵字放在文件4.txt中，想提取文件3.txt中含有關鍵字的行，保存到文件5.txt中.文件3有200萬行，我使用下面的代碼可以實現(xiàn)我的要求，但是非常慢，一個下午還沒運行完，誰有快一點的方法？使用并行改.....

From [Pythondiscussion group] 2017-04-17 17:45:22 0  3  1223

python - Flask 項目中，怎樣設置時區(qū)？

django 中，設置好時區(qū) Time Zone，就不用再去操心時間的轉換問題了。 但是在 Flask 中，就沒有這種配置了。 So，怎樣解決？

From [Pythondiscussion group] 2017-04-17 13:43:40 0  3  1221