asked    Madge     2018-10-22       python       78 view        1 Answer

[SOLVED] SyntaxError: multiple statements found while compiling a single statement [Real Python Rookie]

  1 Answer  

        answered    Berton     2018-10-22      

i-- doesn't work in python. -- is no existing operator. You could use i -= 1 for example.





Your Answer





 2018-10-22         Glenn

How to get elapsed time with system.time?

Is there a way to get just the numerical value of elapsed time from system.time?I want to measure the elapsed time of a bunch of functions I wrote. I call those functions like this:time_f1 <- system.time({ function_1(x,y,z) and some other stuff})time_f2 <- system.time({ function_2(x,y,z) and some other stuff})...time_f1 and the other measured times are objects of type proc_time and I have to extract the elapsed time.Is there a possibility to directly get only the numerical value of the elapsed times, so i can store them in a vector like this:time_f[1] <- system...
 r                     1 answers                     62 view
 2018-10-22         Leo

Rotate transformation on matplotlib axis in subplot

I am trying to create a four-panel figure where the bottom-left panel contains a scatter plot, and the other three panels contain histograms. The top-left will be a standard histogram across the x-dimension of the scatter, the bottom-right will be a 90° rotated histogram for the y-dimension. Both of these are easy to do in matplotlib.I am running into problems with the third histogram, which is to be a 45° rotated plot in the top-right of the figure giving the distribution of the differences between the x and y points. I have made such figures before by manually rotating an...
 python                     1 answers                     61 view
 2018-10-22         Jill

How to `update_all` based on a subquery in Rails

I'm trying to achieve something pretty simple in PostgreSQL the Rails way.Say you have a User model with 3 columns id, cached_segment, cached_step.Say you already have a complex query that calculates segment and query on the fly, encapsulated in a scope User.decorate_with_segment_and_step. This returns an ActiveRecord relation, same as User, but with 3 additional columns:id cached_segment cached_step segment step cache_invalid1 NULL NULL segment_1 step_1 TRUE2 segment_1 step_2 segment_1 step_2 FALSE3 ...The SQL I would like to gen...
 ruby-on-rails                     1 answers                     63 view