How can I make sure my constraint can operate mathematically with the LpVariable? Question: I am trying to use the pulb libraries classes to solve a LP-Problem. I am having problems implementing the constraint into my code. After importing the relevant classes and reading from my CSV file I wrote: prob = pulp.LpProblem("Optimal Number of …
TypeError: unsupported operand type(s) for -: 'list' and 'list' Question: I am trying to implement the Naive Gauss and getting the unsupported operand type error on execution. Output: execfile(filename, namespace) File “/media/zax/MYLINUXLIVE/A0N-.py”, line 26, in <module> print Naive_Gauss([[2,3],[4,5]],[[6],[7]]) File “/media/zax/MYLINUXLIVE/A0N-.py”, line 20, in Naive_Gauss b[row] = b[row]-xmult*b[column] TypeError: unsupported operand type(s) for -: ‘list’ and …
Why do 'and' & 'or' return operands in Python? Question: I’m going through the LPTHW and I came across something I cannot understand. When will it ever be the case that you want your boolean and or or to return something other than the boolean? The LPTHW text states that all languages like python have …
Bad operand type for unary +: 'str' Question: I cannot figure out a problem I am having with code written in Python 2.7. I am converting the references to ints, but I keep getting a type exception bad operand type for unary +: ‘str’. Can anyone assist? import urllib2 import time import datetime stocksToPull = …
