Kelvin's tech-box

Topic

python

A collection of 7 issues

Common sorting algorithms

Algorithm measurement Asymptotic analysis is used to measure the efficienty and accuracy of algrithms.It refers to computing the running time of any operation in mathmatical units of computation. Algrithm types: Best case: Minimum time required for execution Average case: Average time required for execution Wrost case: Maxinum time required

Python PDB Debug

Python PDB Debug Install the pdb lib sudo pip install ipdb Set the breakpoint import ipdb; ipdb.set_trace() Manual - “import pdb” or “import ipdb as pdb“, then “pdb.set_trace()“ - n (next) - ENTER (repeat previous) - q (quit) - p <variable> (print value) -

python Segmentation fault on MacOSX 10.9

After upgrade to Mac OSX 10.9, when run the python interpreter it raises following issue: Segmentation fault: 11 fixing by referring to: http://bugs.python.org/file32324/patch_readline_issue_18458.sh

Python env issue on Mac (Mountain Lion)

Today I have python issue after upgrading to the Moutain Lion. I want to create a new virtual python evironment with virtualenv, but I got this error: Traceback (most recent call last): File "/Library/Python/2.7/site-packages/pip-1.2-py2.7.egg/pip/ basecommand.py", line 106, in

Install PIL on Ubuntu

Sometimes it's hard to install PIL on ubuntu, here are the tips to help fixing the install issue: Install the build dependencies sudo apt-get build-dep python-imaging Symlink the libraries: sudo ln -s /usr/lib/uname -i-linux-gnu/libfreetype.so /usr/lib/ sudo ln -s /usr/lib/uname -i-linux-gnu/libjpeg.

How to fix error when install Fabric

Installing collected packages: pycrypto, paramiko Running setup.py install for pycrypto warning: GMP library not found; Not building Crypto.PublicKey._fastmath. building 'Crypto.Hash.MD2' extension gcc-4.2 -fno-strict-aliasing -fno-common -dynamic -fwrapv -Wall -Wstrict-prototypes -DENABLE_DTRACE -arch i386 -arch ppc -arch x86_64 -pipe -std=c99 -O3 -fomit-frame-pointer

MySQLdb missing image error from PyCharm IDE when django sync

Solution: You can set the environment used by launchd (and, by extension, anything started from Spotlight) with launchctl setenv. For example to set the path: launchctl setenv PATH /opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin Or if you want to set up your path in