Software engineering facts, information, and skills categorized as Programming Languages
Python 3 - Django 2.x: ImportError: No module named 'django.core.urlresolvers' is a common error we get when we migrate from python 2.x to python 3.x and use latest Django > 2.0. the common error message looks like
How can we get the month name from the month number? For instance, if I have 3, I want to return march? Most simple method is to define a function that checks for the number and return name.
Perl is an object oriented language. Perl has packages(class) that could be instanciated and used. At first, we need to decide the file namefor the package ans the perl class name carries the file name. For example, a package
Student should be in the file
Student.pm. If it shouldbe called
Bright::Student, it should be saved as
Student.pm in a directory named
Bright. There is no formal relationship between directory name and modules. That is just grouping for convenience.
With Net:FTP for uplink and downlink file transfers, we may have problems with obtaining the same statistics that are provided by ftp when you perform a manual transfer, i.e file size, transfer duration and transfer speed in KBs. The easiest solution is to print the
$ftp->message; It contain some message. For example,
We often needto sort a list of dictionaries by calculated value. Python's sorted is very powerful so that it can do literally anything with custom key function Assume that we have a list of 20 students with their name and marks. Wedont have the total of their marksin the list. We want to sort them by rank, ie descending order of total marks.
Python provides a method
sorted which returns the sorted array and will not change the original array, where as
list.sort() with change the array in place.