python-2.7

问题 I want know if there is a elegant method for looking if a value that continually changes in a while loop can be checked and stop the while loop if the value stops change and remains the same. For example: Value = 0 while True: value changes everytime (if value still the same break) 回答1: How about this way? BTW: Fix your typo error while is not While in python. value = 0 while True: old_value, value = value, way_to_new_value if value == old_value: break 回答2: previous = None current = object()

问题 How do I make zsh on a mac use python 2.7.6 which I have in my /usr/local/bin/python instead of python 2.7.5 which is in /usr/bin/python? (without needing to type /usr/local/bin/python before the script I want to run). My path setting on .zprofile is: # Setting PATH for Python 2.7 # The orginal version is saved in .zprofile.pysave PATH="/Library/Frameworks/Python.framework/Versions/2.7/bin:${PATH}" export PATH 回答1: Set: export PATH="/usr/local/bin:$PATH" in your ~/.zshrc file. 来源： https:/

问题 I have the following matrices: A.toarray() array([[0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0], ..., [0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0], [0, 0, 0, ..., 0, 0, 0]], dtype=int64) type(A) scipy.sparse.csr.csr_matrix A.shape (878049, 942) And matrix B: B array([2248, 2248, 2248, ..., 0, 0, 0]) type(B) numpy.ndarray B.shape (878049,) I would like to column stack A and B in C, I tried the folowing: C = sparse.column_stack([A,B]) Then: /usr/local/lib/python3

问题 The following code works in Python 2.7, to dynamically inject local variables into a function scope: myvars = {"var": 123} def func(): exec("") locals().update(myvars) print(var) func() # assert "var" not in globals() It's a bit subtle, but the presence of an exec statement indicates to the compiler that the local namespace may be modified. In the reference implementation, it will transform the lookup of the name "locals" from a LOAD_GLOBAL op into a LOAD_NAME op, enabling addition to the

问题 I created a numpy array as follows: import numpy as np names = np.array(['NAME_1', 'NAME_2', 'NAME_3']) floats = np.array([ 0.1234 , 0.5678 , 0.9123 ]) ab = np.zeros(names.size, dtype=[('var1', 'U6'), ('var2', float)]) ab['var1'] = names ab['var2'] = floats The values in ab are shown below: array([(u'NAME_1', 0.1234), (u'NAME_2', 0.5678), (u'NAME_3', 0.9123)], dtype=[('var1', '<U6'), ('var2', '<f8')]) When I try to save ab as a .csv file using savetxt() command, np.savetxt('D:\test.csv',ab

问题 I am currently trying to run a .py file but in a loop. Just for a test I am using I = 0 while I<10: os.pause(10) open(home/Tyler/desktop/test.py) I = I + 1 I am sure this is a very simple question but I can't figure this one out. I would also like to add in the very end of this I have to make this run infinitely and let it run for some other things. 回答1: There are a few reasons why your code isn't working: Incorrect indentation (this may just be how you copied it on to StackOverflow though).

问题 I am currently trying to run a .py file but in a loop. Just for a test I am using I = 0 while I<10: os.pause(10) open(home/Tyler/desktop/test.py) I = I + 1 I am sure this is a very simple question but I can't figure this one out. I would also like to add in the very end of this I have to make this run infinitely and let it run for some other things. 回答1: There are a few reasons why your code isn't working: Incorrect indentation (this may just be how you copied it on to StackOverflow though).

问题 I'm trying to install pygame in my python 2.7. I do it in this python because for some reason if I try to install pip in python 3.7 it won't work. From the terminal I entered: sudo pip install pygame And supposedly I installed it well, but when I try to do the import it tells me: Traceback (most recent call last): File "example.py", line 1, in <module> import pygame ImportError: No module named pygame if i try to do again sudo pip install pygame : Requirement already satisfied: pygame in

问题 For example, Suppose the word "happy" is given, I want to generate other forms of happy such as happiness, happily... etc. I have read some other previous questions on Stackoverflow and NLTK references. However, there are only POS tagging, morph just like identifying the grammatical form of certain words within sentences, not generating a list of different words. Is there anyone who bumped into similar issues? Thank you. 回答1: This type of information is included in the Lemma class of NLTK's

问题 I am working on a Online Judge code checker.My code uses multi-threading in python 2.7.The same program on my local machine (i core 3 RAM 4GB) evaluates about 1000 submisions in 1 minute 10 seconds. But when I run it on ec2 micro instance(about 600 MB RAM) it takes about 40 minutes(It gets slow for some random seconds).To know the reason I broke down things. First this is how my evaluator works: I have a main program worker.py , which creates multiple threads The main thread pulls submissions