I want to output a list like:
operation1 = [ 'command\s+[0-9]+', ] Where the pattern [0-9]+ is to be dynamically filled.
So I wrote:
reg = { 'NUMBER' : '^[0-9]+$', } operation1 = [ 'command\s+'+str(reg[NUMBER]), ] print operation1 But i am getting an error:
Message File Name Line Position Traceback <module> <module1> 6 NameError: name 'NUMBER' is not defined Help needed! Thanks in advance.
it should be reg['NUMBER'], I guess. 'NUMBER' is not a variable
NUMBER should be a string:
reg['NUMBER'] You're using variable NUMBER, which is not defined. I think what you wanted to use is string 'NUMBER', like this:
>>> operation1 = ['command\s+[0-9]+',] >>> reg = {'NUMBER' : '^[0-9]+$'} >>> operation1 = [x + reg['NUMBER'] for x in operation1] >>> operation1 ['command\\s+[0-9]+^[0-9]+$'] You need to put the key in quotes (Perl allows not adding quotes, but not Python):
operation1 = [ 'command\s+'+str(reg['NUMBER']), ] You also don't need the call to str:
operation1 = [ 'command\s+'+reg['NUMBER'], ] You could even do this (although not related to the original question):
operation1 = [ 'command\s+{}'.format(reg['NUMBER']), ] 