Home
Q&A
Education
Technology
Credit
General
Health
Insurance
Questions
Ask a Question
Python equivalent of select * from a where account_id in (select account_id from b)
Home
Education
Python equivalent of select * from a where...
asked
Jan 18, 2022
in
Education
by
JackTerrance
I am from an SQL background was looking for the best way of doing this. c = a.account_id.isin(b.account_id).astype(bool) a[c] Is the above method efficient way? Select the correct answer from above options
python
data-science
1
Answer
0
votes
answered
Jan 18, 2022
by
JackTerrance
Best answer
Yes, it is, but we can put them into one row, and you do not need to convert isin output as bool since it is already bool type. a[a.account_id.isin(b.account_id)] Learn Python for Data Science Course to improve your technical knowledge.
Related questions
0
votes
Q: Select only the bottom continuous rows where specific value is present Pandas
I have the below data frame lst = [['A',1],['B',0],['C',1],['D',0],['E',1],['F',1],['G',1]] ... give all val with 1. df[df.val == 1] Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Python Dataframe select last n rows based on present value condition
I have this dataframe and trying to select the last n (=2) rows if the present value is True so I code as ... , I should select 50,40 Select the correct answer from above options...
asked
Jan 8, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Where can I learn Python for Data Science?
Can anyone tell me where can I learn Python for Data Science? Select the correct answer from above options...
asked
Jan 11, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: How to add values from two dataframes according to the persons in first column? Python Pandas
I have 2 data frames df1 Name 2010 2011 0 Jack 25 35 1 Jill 15 20 df2 Name 2010 2011 0 Berry 45 25 1 ... used the code df1.add(df2) Select the correct answer from above options...
asked
Jan 18, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Count the latest same values from column python
I have data like this: id a b c d 1 y y z z 2 y z y y 3 y y y y I want to count the value of "y" ... 1 2 2 1 3 4 Can anyone help me? Select the correct answer from above options...
asked
Jan 9, 2022
in
Education
by
JackTerrance
python
data-science
0
votes
Q: Python Implementation of OPTICS (Clustering) Algorithm
I'm looking for a decent implementation of the OPTICS algorithm in Python. I will use it to form density-based ... to that cluster. Select the correct answer from above options...
asked
Jan 28, 2022
in
Education
by
JackTerrance
machine-learning
artificial-intelligence
neural-network
data-science
python
0
votes
Q: Combine two columns of text in dataframe in pandas/python
I have a 20 x 4000 dataframe in python using pandas. Two of these columns are named Year and quarter. I'd ... anyone help with that? Select the correct answer from above options...
asked
Jan 28, 2022
in
Education
by
JackTerrance
pandas
machine-learning
python
data-science
0
votes
Q: Python- Saving files for each loop results
I want to save files for each result from the loop. For example, I wrote the code but it only saves one file ... do I modify my code? Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Using regex to find first bracketed content in Python 3
Here is my sample string: [true, {"name": "NameofItem", "amount": "1", "price": 100, "sellerName": " ... seem to make that work. Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: How to correct an arithmetic error in python [duplicate]
Hi, I am a relatively new programmer and my teacher gave us this problem to fix. Thing is, I have no idea ... wrong with this problem? Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Python replace 1.0 and 0.0 with True and False in dataframe
I have a big data frame. I want to replace float 1.0 and 0.0 with the true and false. My code: import pandas ... to do it in one line. Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Why Python is better than R for Data Science?
Can anyone tell me why Python is better than R for Data Science? Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
rprogramming
0
votes
Q: Why Python is used in Data Science?
Can anyone tell me why Python is used in Data Science? Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Is Python necessary for Data Science?
Can anyone tell me whether Python is necessary for Data Science? Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
0
votes
Q: Is Python good for Data Science?
Can anyone tell me whether Python is good for Data Science? Select the correct answer from above options...
asked
Jan 19, 2022
in
Education
by
JackTerrance
data-science
python
...