Python Initialise a list to a specific length

Below show some tricks that you can play to create a list of certain size

 

 

 

 

 

def main():
    check(5, '''/path/to/CommandLine/CommandLine.exe''', ">null 2>&1")
#    for i, v in enumerate(initializeList(5)):
#        print "i: {0}, v: {1}" % (i, v)
    for i, v in enumerate(initializeList(5, value = None)):
        print "{0}:{1}".format(i, v)
    for i, v in enumerate(initializeList2(5, value = None)):
        print "{0}:{1}".format(i, v)


def initializeList(size, value=None):
#    l = [None] * size
    l = []
    for i in range(size):
        l.append(value)
    return l
    
def initializeList2(size, value=None):
    return [value] * size; 

 

 

So in a nutshell, they are two ways that you can create and initalize a list with a fixed size, 

 

 

• with the * operator on list (which is to create duplicate the list n times)
• create an empty list and stack things onto it