Whenever I call ElementTree.tostring(e), I get the following error message: Is there any other way to convert an ElementTree object into an XML string? TraceBack: Answer Element objects have no .getroot() method. Drop that call, and the .tostring() call works: You only need to use .getroot() if you have an El…
Tag: python
TypeError: unsupported operand type(s) for /: ‘str’ and ‘str’
whenever i run this program i get this what can i do to divide pyc by tpy? Answer By turning them into integers instead: In python 3, the input() function returns a string. Always. This is a change from Python 2; the raw_input() function was renamed to input().
How do I retrieve a username with Python keyring?
I have a Mercurial keyring on my Windows 7 machine. I am using the Python keyring library to get user credentials from the Mercurial keyring. I can retrieve the password for a given username with: Is there a similar function to retrieve the username? Answer You are expected to have stored the username somewhe…
How do I update/upgrade pip itself from inside my virtual environment?
I’m able to update pip-managed packages, but how do I update pip itself? According to pip –version, I currently have pip 1.1 installed in my virtualenv and I want to update to the latest version. What’s the command for that? Do I need to use distribute or is there a native pip or virtualenv …
python regex get first part of an email address
I am quite new to python and regex and I was wondering how to extract the first part of an email address upto the domain name. So for example if: I would like the regex result to be (taking into account all “sorts” of email ids i.e including numbers etc..): I get the idea of regex – as in I
Using python’s eval() vs. ast.literal_eval()
I have a situation with some code where eval() came up as a possible solution. Now I have never had to use eval() before but, I have come across plenty of information about the potential danger it can cause. That said, I’m very wary about using it. My situation is that I have input being given by a user…
Flask 302 error code when using flask.redirect
I have this code https://github.com/italomaia/flask-empty/blob/master/src/0.8/main.py and I wrote at the end of the file: If I run this code, I get 302 server error (ERR_TOO_MANY_REDIRECTS), but if I change this line return redirect(url_for(‘login’)) by return ‘Hello!’ it works without…
Using cat command in Python for printing
In the Linux kernel, I can send a file to the printer using the following command From what I understand, this redirects the contents in file.txt into the printing location. I tried using the following command I thought this command would achieve the same thing, but it gave me a “Permission Denied”…
Passing an integer by reference in Python
How can I pass an integer by reference in Python? I want to modify the value of a variable that I am passing to the function. I have read that everything in Python is pass by value, but there has to be an easy trick. For example, in Java you could pass the reference types of Integer, Long, etc. How
What is the use of join() in threading?
I was studying the python threading and came across join(). The author told that if thread is in daemon mode then i need to use join() so that thread can finish itself before main thread terminates. but I have also seen him using t.join() even though t was not daemon example code is this i don’t know wh…