pq | line Protobuf parser with Kafka support | Parser library
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kandi X-RAY | pq Summary
a command-line Protobuf parser with Kafka support and JSON output
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QUESTION
I have three .snappy.parquet
files stored in an s3 bucket, I tried to use pandas.read_parquet()
but it only work when I specify one single parquet file, e.g: df = pandas.read_parquet("s3://bucketname/xxx.snappy.parquet")
, but if I don't specify the filename df = pandas.read_parquet("s3://bucketname")
, this won't work and it gave me error: Seek before start of file
.
I did a lot of reading, then I found this page
it suggests that we can use pyarrow
to read multiple parquet files, so here's what I tried:
ANSWER
Answered 2021-Jun-15 at 13:59You have a column with a "struct type" and you want to flatten it. To do so call flatten before calling to_pandas
QUESTION
I would like to check if the text of a variable contains some geographical reference. I have created a dictionary with all the municipalities I'm interested in. My goal would be to have a dummy variable capturing whether the text of the variable includes any word included in the dictionary. Can you help me with that? I know it isprobably very easy but I'm struggling to do it.
This is my MWE
...ANSWER
Answered 2021-Jun-14 at 08:34You don't need to create your dictionary from the corpus - instead, create a single dictionary entry for your locality list, and look that up to generate a count of each locality. You can then count them by compiling the dfm, and then converting the feature of that dictionary key into a logical to get the vector you want.
QUESTION
All three lines below compiled, are there any differences? If not, is it a good Java practice to always stick to the first one as it has the least amount of code?
...ANSWER
Answered 2021-Jun-13 at 21:40It is totally equivalent rows (see diamond):
QUESTION
I came across this:
...ANSWER
Answered 2021-Jun-13 at 20:19template using PQ = priority_queue;
QUESTION
I am trying to filter pyarrow data with pyarrow.dataset. I want to add a dynamic way to add to the expressions.
...ANSWER
Answered 2021-Jun-10 at 07:28You can use operator.and_
to have the functional equivalent of the &
operator. And then with functools.reduce
it can be recursively applied on a list of expressions.
Using your three example expressions:
QUESTION
while working on a Go web-app project (for learning), i have encounterd the following issue:
at the begining, everything was alright. i imported packages from the standart library, used them in the code and everyting worked. up to the moment when i have tried to import the pq driver for postgresql.
the actions that i did in detail: the folder with the project files inside: notes.
project is in the directory: C:\Users\david\go\src\github.com\davidkuch\notes
when starting, i run the command: go mod init.
i imported the standart package "database/sql".
to download the package i used: go get "github.com/lib/pq"
after that- go mod tidy
but the compiler says:could not import {package-name} no required module provides package {package-name}
i tried to read through the docs of the related topics, but couldn't find where i did a mistake. the same happens for another package i have tried to install from github.
can anyone point out where i should be looking to find the problem? as the compiler says that he "cannot find", i made a lot of effort checking namings and paths. but i see the package exactly in the path i try to import from. to be more precise:
after some hours of trying to fix that by myself, i ask You for some help or explanation of what is happening.
thank you!
...ANSWER
Answered 2021-Jun-08 at 15:31project is in the directory:
C:\Users\david\go\src\github.com\davidkuch\notes
You dont need to do that. Just make a folder like: C:\Users\david\notes
.
Then make C:\Users\david\notes\main.go
:
QUESTION
I have written code to read the same parquet file using c++ and using python. The time taken to read the file is much less for python than in c++, but as generally we know, execution in c++ is faster than in python. I have attached the code here -
...ANSWER
Answered 2021-Jun-06 at 06:53It is likely that the Python module is bound to functions compiled in a language such as c++ or using cython. The implementation of the python module may thus have better performance, depending on how it reads from the file or processes data.
QUESTION
I have one dataframe -
...ANSWER
Answered 2021-Jun-06 at 18:35Try:
QUESTION
I created a "TitleDetails" view below and I'd like to stack that titleDetails view into another reusable view. There are no errors thrown for the TitleDetails constraints. I'd just like to stack 2 TitleDetails views into a new view.
However, when I do the constraints it appears I need the Y position for height, however the height of titleDetails should be determined by its contents and the space between the two is constrained as well. So I'm not seeing where the ambiguity is coming from.
...ANSWER
Answered 2021-Jun-04 at 13:21What you've shown would be very easy to implement via code, rather than XIB files.
However, the reason you're getting the ambiguity is because interface builder cannot determine the intrinsic height as you have designed it.
IF your current implementation gives you the desired layout at run-time, you can get rid of the "ambiguous" errors / warnings by giving your top TitleDetails
view a "Placeholder" intrinsic height.
Select the view, and then in the Size Inspector pane:
QUESTION
So I am designing what should be a simple view.
This is how I want it to be, with the title taking up only the horizontal space that it needs. However, when I set the number of lines for the Details view to 0 so that it can be multiple lines, or when I do the same for the title label, I automatically get this:
I do like using a Stack View for these labels, because it seems the most natural choice to account for dynamic text. All that I would have to do when the text gets larger is change the axis to vertical. I have already set the hugging priority of the title label to 252 and I have already set a proportionate widths constraint so that the details will have a greater or equal width to the title.
So there is no ambiguity for the widths of the labels
the title label width should equal the width of its contents, until the contents reach the point that they would exceed the width of the details label, then word wrap.
The details label should should have a width equal to its contents as well, until it would exceed the bounds allowed by the higher priority hugging on the left and the trailing constraint on the right, then it should word wrap.
Here is my xib as an xml source code
...ANSWER
Answered 2021-Jun-02 at 01:30If you set the content hugging priority of the left label to 1000 (Required), it works.
There might be something with a very high priority in the stack view that is stopping the label from hugging its content.
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