python-3.5

Here is a complete simple working example import multiprocessing as mp import time import random class Foo: def __init__(self): # some expensive set up function in the real code self.x = 2 print('initializing') def run(self, y): time.sleep(random.random() / 10.) return self.x + y def f(y): foo = Foo() return foo.run(y) def main(): pool = mp.Pool(4) for result in pool.map(f, range(10)): print(result) pool.close() pool.join() if __name__ == '__main__': main() How can I modify it so Foo is only initialized once by each worker, not every task? Basically I want the init called 4 times, not 10. I am

First there are questions on this forum very similar to this one but trust me none matches so no duplicating please. I have encountered two methods of linear regression using scikit's sklearn and I am failing to understand the difference between the two, especially where in first code there's a method train_test_split() called while in the other one directly fit method is called. I am studying with multiple resources and this single issue is very confusing to me. First which uses SVR X = np.array(df.drop(['label'], 1)) X = preprocessing.scale(X) y = np.array(df['label']) X_train, X_test, y

Well, looking around here there are tons of questions about how to correctly installing virtualenvwrapper on Mac. I really tried all of them but for no avail. I've noticed the previous questions don't have the configuration like my computer, so here it is: Mac OS Sierra 10.12 Python3.5.2 installed from python.org installer for Mac OS This installation puts Python3.5.2 in this path: /Library/Frameworks/Python.framework/Versions/3.5/bin/python3 I've run python3 get-pip.py command to install pip correctly, as I think sudo pip3 virtualenvwrapper to be sure all settings will be done as they should

And I'd like to specifically achieve that with the try catch construct. This related question suggests that I can do: try: open(fileName, 'wb+') except: print("File already opened!") raise However, it doesn't work me. I can open the same file multiple times without any problem: fileObj1 = open(fileName, 'wb+') fileObj2 = open(fileName, 'wb+') Is it because I have Python 3.5? Or because I'm using Raspbian ? Thanks for the help! atayenel You open the same file but assign them to different variables. What you should do is: fileobj=open(filename,"wb+") if not fileobj.closed: print("file is already

I've just started to learn Python but I already ran into troubles. I have a simple script with just one command: #!/usr/bin/env python3 print("Příliš žluťoučký kůň úpěl ďábelské ódy.") # Text in Czech When I try to run this script: python3 hello.py I get this message: Traceback (most recent call last): File "hello.py", line 2, in <module> print("P\u0159\xedli\u0161 \u017elu\u0165ou\u010dk\xfd k\u016fn \xfap\u011bl \u010f\xe1belsk\xe9 \xf3dy.") UnicodeEncodeError: 'ascii' codec can't encode characters in position 1-2: ordinal not in range(128) I am using Kubuntu 16.04 and Python 3.5.2. When I

I cannot manage to import statsmodels.api correctly when i do that I have this error: File "/home/mlv/.local/lib/python3.5/site-packages/statsmodels/tsa/statespace/tools.py", line 59, in set_mode from . import (_representation, _kalman_filter, _kalman_smoother, ImportError: cannot import name '_representation' I already try to re-install or update it, that does not change. plese i need help =) Please see the github report for more detail. It turns out that statsmodels is dependent upon several packages being installed before it so that it can key on them to compile its own modules. I don't