Difference between revisions of "Object and Data Structure Basics"
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| Line 3: | Line 3: | ||
len(mylist) # get length of list | len(mylist) # get length of list | ||
Result 3 | Result 3 | ||
Get part of a list (Slicing) | '''Get part of a list (Slicing)''' | ||
mylist[1:] gets from index one to the end | mylist[1:] gets from index one to the end | ||
result 1,2,3 | result 1,2,3 | ||
Concatenate list | '''Concatenate list''' | ||
another_list = [5,6] | another_list = [5,6] | ||
newlist = mylist + anohter_list | newlist = mylist + anohter_list | ||
result ['string', 1,2,3,5,6] | result ['string', 1,2,3,5,6] | ||
Add an item to the end of a list | '''Add an item to the end of a list''' | ||
newlist.append('hello') | newlist.append('hello') | ||
'''Remove item from list''' | |||
newlist.pop() # will pop last item | |||
newlist.pop(0) # will pop index item 0 | |||
''' Sort and Reverse''' | |||
newlist.sort() # sort list in place, which means you have to call newlist again to get the sorted results. you cannot do x = newlist.sort() becasue it will return nothing | |||
Revision as of 21:29, 2 January 2019
List
mylist= ['string', 1,2,3] len(mylist) # get length of list Result 3
Get part of a list (Slicing)
mylist[1:] gets from index one to the end result 1,2,3
Concatenate list
another_list = [5,6] newlist = mylist + anohter_list result ['string', 1,2,3,5,6]
Add an item to the end of a list
newlist.append('hello')
Remove item from list
newlist.pop() # will pop last item newlist.pop(0) # will pop index item 0
Sort and Reverse
newlist.sort() # sort list in place, which means you have to call newlist again to get the sorted results. you cannot do x = newlist.sort() becasue it will return nothing