an introduction of python decorators

compare apply(apply_async) and map(map_async) in multiprocessing.Pool

compare multiprocessing.Process v.s. threading.Thread

为了自动给blog备份，我把blog放在dropbox里面，这样主机和vmware上的ubuntu_dl机器可以同步，而且dropbox在线还有一份，这样不同意丢了。即使不小心删掉也会有online的备份。

可是一个问题是老是会出现git的error,比如

hhh@ubuntu:~/Dropbox/blog/output$ git commit -m "test"
error: object file .git/objects/d2/f4c036db03671b6d859b137e4ccdc06383fb14 is empty
error: object file .git/objects/d2/f4c036db03671b6d859b137e4ccdc06383fb14 is empty
fatal: loose object d2f4c036db03671b6d859b137e4ccdc06383fb14 (stored in .git/objects/d2/f4c036db03671b6d859b137e4ccdc06383fb14) is corrupt

hhh@ubuntu:~/Dropbox ...

an introduction and summary of multiprocessing/threads in python

an introduction of closure in python nested function

add tabs(QTabWidget) to print the data and the models.

from the previous file, now to use widgets and structure the code.

to show how to read in the csv file, create comboBox from the columns in the read in data, slice data with conditions from the comboBox and at last, plot the selected subset data to compare.

figure out the errors in running cx_freeze