The new version of Pandas uses the following interface to load Excel files: but what if I don’t know the sheets that are available? For example, I am working with excel files that the following sheets Data 1, Data 2 …, Data N, foo, bar but I don’t know N a priori. Is there any way to get the…
Tag: python
How to execute raw SQL in Flask-SQLAlchemy app
How do you execute raw SQL in SQLAlchemy? I have a python web app that runs on flask and interfaces to the database through SQLAlchemy. I need a way to run the raw SQL. The query involves multiple table joins along with Inline views. I’ve tried: But I keep getting gateway errors. Answer Have you tried: …
in Numpy, how to zip two 2-D arrays?
For example I have 2 arrays How can I zip a and b so I get ? Answer You can use dstack: If you must have tuples: For Python 3+ you need to expand the zip iterator object. Please note that this is horribly inefficient:
How to create multiple frames in python through For Loop?
I am working on GUI programming of python using Tkinter. I am creating 4 frames(Frame1, Frame2, Frame3 and Frame4) in my Tkinter Root Window by using the below code: The same thing I want to do using a for loop to make my code readable as in my real code the frames are around 12. I am trying the below
format strings and named arguments in Python
Case 1: It will give KeyError: ‘arg1′ because I didn’t pass the named arguments. Case 2: Now it will work properly because I passed the named arguments. And it prints ’10 20’ Case 3: And, If I pass wrong name it will show KeyError: ‘arg1’ But, Case 4: If I pass the na…
Setting Cell Formats with xlwt format strings
I’ve looked around for several different xlwt formats for cells, but I can’t find a comprehensive list. Excel provides the following options for cell content formatting: (general, number, currency, accounting, date, time, percentage, fraction, scientific, text, special, custom) Obviously custom is…
Simplest method to call a function from keypress in python(3)
I have a python application in which a function runs in a recursive loop and prints updated info to the terminal with each cycle around the loop, all is good until I try to stop this recursion. It does not stop until the terminal window is closed or the application is killed (control-c is pressed) however I a…
How to exit pdb and allow program to continue?
I’m using the pdb module to debug a program. I’d like to understand how I can exit pdb and allow the program to continue onward to completion. The program is computationally expensive to run, so I don’t want to exit without the script attempting to complete. continue doesn’t seems to w…
i18n_patterns: How come some user are accessing /en-us/ where what I have is /en/
I am using i18n_patterns for my URL and yesterday when I launched the live site I noticed through Google Analytics many people are accessing http://www.example.com/**en-us**/ instead of http://www.example.com/**en**/. I do not have http://www.example.com/**en-us**/ link anywhere on my site. Personally, when I…
Python Requests: Hook or no Hook?
I ‘.get’ a request and process the response like: After reading the package’s docs, I saw that there is a hook functionality which would permit me to do: My questions: When should I use hooks? Or, why should I use hooks? I wish to initiate an object (a parser) after a request’s respons…