http://stackoverflow.com/questions/986006/python-how-do-i-pass-a-variable-by-reference Question The Python documentation seems unclear about whether parameters are passed by reference or value, and the following code produces the unchanged value ‘Original’ class PassByReference:     def __init__(self):         self.variable = 'Original'         sel...阅读全文

Recently I need to calculate the time cost for some test cases running on Linux.  After searching online, I got an answer: using time.clock or time.time. And I did a sample test on Windows with time.clock which works well. But when running it under Linux. The result is totally different. My code as below which is quite simple by calling time.clock or time.time...阅读全文

Unlike other OOP language, such as C++/Java, which provides private access mechanism to prevent its constructor be accessed and then be instanced, Python doesn’t have such mechanism, i.e, “Private” instance variables that cannot be accessed except from inside an object don’t exist in Python. So how to implement Singleton in Python without “Private&...阅读全文

Below code is to get the current date and the following one month date, then covert them to a string. =====mydate.py===== import datetime today = datetime.datetime.now() nextMonth = today + datetime.timedelta( days=30 ) startDate = today.strftime(“%Y-%m-%d”) endDate = nextMonth.strftime(“%Y-%m-%d”) print startDate, endDate.   阅读全文

Today I’d like share several third-party python packages. 1. Py2Exe http://www.py2exe.org/ py2exe converts Python scripts into executable Windows programs, able to run without requiring a Python installation. The usage is quite simple, please refer to http://www.py2exe.org/index.cgi/Tutorial. 2.PyWin32 http://sourceforge.net/projects/pywin32/ Win32 API W...阅读全文