encode converts a unicode object to a string object. But here you have invoked it on a string object (because you don’t have the u). So python has to convert the string to a unicode object first. So it does the equivalent of But the decode fails because the string isn’t valid ascii. That’s why you get a complaint about not being able to … Read more
In list[first:last], last is not included. The 10th element is ls[9], in ls[0:10] there isn’t ls[10].
If you really want to handle with HTTP using Python, I highly recommend Requests: HTTP for Humans. The POST quickstart adapted to your question is:
It means not equal to. It was taken from ABC (python’s predecessor) see here: x < y, x <= y, x >= y, x > y, x = y, x <> y, 0 <= d < 10 Order tests (<> means ‘not equals’) I believe ABC took it from Pascal, a language Guido began programming with. It has now been removed in … Read more
The right answer (using Python 2.7 and later, since check_output() was introduced then) is: To demonstrate, here are my two programs: py2.py: py3.py: Running it: Here’s what’s wrong with each of your versions: First, str(‘python py2.py’) is exactly the same thing as ‘python py2.py’—you’re taking a str, and calling str to convert it to an str. This makes the code harder to read, longer, … Read more
The problem here is that the + operator has (at least) two different meanings in Python: for numeric types, it means “add the numbers together”: … and for sequence types, it means “concatenate the sequences”: As a rule, Python doesn’t implicitly convert objects from one type to another1 in order to make operations “make sense”, because that would … Read more
The right answer (using Python 2.7 and later, since check_output() was introduced then) is: To demonstrate, here are my two programs: py2.py: py3.py: Running it: Here’s what’s wrong with each of your versions: First, str(‘python py2.py’) is exactly the same thing as ‘python py2.py’—you’re taking a str, and calling str to convert it to an str. This makes the code harder to read, longer, … Read more
You need to use one of the following commands. Which one depends on what OS and software you have and use. easy_install mysql-python (mix os) pip install mysql-python (mix os/ python 2) pip install mysqlclient (mix os/ python 3) apt-get install python-mysqldb (Linux Ubuntu, …) cd /usr/ports/databases/py-MySQLdb && make install clean (FreeBSD) yum install MySQL-python (Linux Fedora, CentOS …) For Windows, … Read more
I am using Python version 2.5.4 and install MySQL version 5.0 and Django. Django is working fine with Python, but not MySQL. I am using it in Windows Vista.
writelines expects an iterable of strings write expects a single string. line1 + “\n” + line2 merges those strings together into a single string before passing it to write. Note that if you have many lines, you may want to use “\n”.join(list_of_lines).