python - The distributed operation of pyspider is successful, and 2 slaves are running, but the time is not shortened?

1 master, 2 slaves, under the virtual machine ubuntu, the configuration is as follows: master's config.json: {...

From [Pythondiscussion group] 2017-06-28 09:22:42 0  1  1039

python - Can I execute the source statement using pyhive?

cursor.execute("source '/home/hadoop/create_table.sql'") execution result {code...} The above error ...

From [Pythondiscussion group] 2017-06-28 09:22:35 0  1  1683

python - How can I optimize the speed of pandas' read_sql?

My needs require data query and correlation between multiple databases, so I chose to use pandas, read the dat...

From [Pythondiscussion group] 2017-06-28 09:22:30 0  1  2288

Python extract domain name from URL

How to extract domain name from URL in Python? URLs have various formats as follows: Input: {code...} Output: ...

From [Pythondiscussion group] 2017-06-28 09:22:24 0  2  883

selenium - Ask about Python crawler tool

1) What I want to capture are fans of a certain star on Instagram. 2) The Instagram PC site uses a lot of js r...

From [Pythondiscussion group] 2017-06-28 09:22:20 0  1  1057

How sklearn trains large-scale data sets - Stack Overflow

Question 1: Now I have more than 400,000 pieces of data. I need to use some kind of machine learning classific...

From [Pythondiscussion group] 2017-06-28 09:22:17 0  3  1168

python - Crawling WeChat public account articles requires entering verification code

The request is normal at first. If there are too many requests, this web page will be returned, prompting for ...

From [Pythondiscussion group] 2017-06-28 09:22:11 0  3  9684

aiohttp is installed in python3, but the import still fails when entering python3.

The virtual machine environment is Ubuntu - 64-bit pip is installed under python3. When using pip to install a...

From [Pythondiscussion group] 2017-06-28 09:22:08 0  2  1075

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  1168

python redis list insertion speed is too slow

{Code...} This kind of execution efficiency is terrible. You need to wait dozens of seconds for the insertion ...

From [Pythondiscussion group] 2017-06-28 09:21:58 0  1  1372

Python novice asked about parameters that cannot be found

The code is as follows: {Code...} Execution results: My question: The program prompts that new_name cannot be ...

From [Pythondiscussion group] 2017-06-22 11:53:02 0  3  783

Python newbie about the failure of methods in classes to obtain variables

The code is as follows: {code...} Execution results: My question: I have passed in 2 values, one haha ​​and on...

From [Pythondiscussion group] 2017-06-22 11:53:00 0  4  881

python - Why does lxml.etree automatically add plus</i>?

I am learning lxml. The code is as follows: {code...} The output is as follows: {code...} I mainly don’t under...

From [Pythondiscussion group] 2017-06-22 11:52:40 0  1  809

python3.x - Problem with Python not operator

{Code...} {Code...} As above, False will be calculated as 0 when operated directly. When using the logical ope...

From [Pythondiscussion group] 2017-06-22 11:52:39 0  3  1350

Python novice is learning to read by himself and encounters something he doesn't understand

As shown in the picture, I have been learning python by myself recently. When I read books, I often see this k...

From [Pythondiscussion group] 2017-06-22 11:52:38 0  3  1022