Object and Data Structure Basics - Revision history

Bacchas at 16:19, 1 September 2020

2020-09-01T16:19:38Z

← Older revision		Revision as of 16:19, 1 September 2020
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	output {1,2.3}		output {1,2.3}
	==[[#top\|Back To Top]] - [[Python\|Category]]==		==[[#top\|Back To Top]] - [[Python\|Category]]==
			[[Category:Python]]

2020-03-12T19:40:07Z

← Older revision		Revision as of 19:40, 12 March 2020
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	set(mylist) # will return only the unique values		set(mylist) # will return only the unique values
	output {1,2.3}		output {1,2.3}
			==[[#top\|Back To Top]] - [[Python\|Category]]==

2019-01-04T16:50:01Z

Sets

← Older revision		Revision as of 16:50, 4 January 2019
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	==Sets==		==Sets==
	Sets are unordered collections of unique elements, meaning there can only be one representative of the same object		Sets are unordered collections of unique elements, meaning there can only be one representative of the same object
			myset = set()
			myset.add(1)
			mylist = [1,1,1,2,2,3,3]
			set(mylist) # will return only the unique values
			output {1,2.3}

2019-01-03T21:42:54Z

← Older revision		Revision as of 21:42, 3 January 2019
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	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		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
	numlist.reverse() # reverse in place		numlist.reverse() # reverse in place
	~~==Tuples==~~
	~~Tuples are immutable~~
	~~t=(1,2,3)~~
	~~len(t)~~
	~~t[0]~~
	~~t.count(1) # will count the amount of time 1 appears~~
	~~t.index(1) # will return the first index that 1 occors~~

	==Dictionaries==		==Dictionaries==
	'''Has key value pairs'''		'''Has key value pairs'''
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	mydict2['k2'][2]		mydict2['k2'][2]
	mydict2['k3']['insidekey']		mydict2['k3']['insidekey']
	Add to ~~dictonary~~		Add to dictionary
	mydict2['k4'] = 300		mydict2['k4'] = 300
	List all keys in dictionary		List all keys in dictionary
	mydict2.keys()		mydict2.keys()
	List all values in ~~distionary~~		List all values in dictionary
	dict2.values()		dict2.values()
	List both items and keys		List both items and keys
	dict2.items()		dict2.items()
			==Tuples==
			Tuples are immutable
			t=(1,2,3)
			len(t)
			t[0]
			t.count(1) # will count the amount of time 1 appears
			t.index(1) # will return the first index that 1 occurs

			==Sets==
			Sets are unordered collections of unique elements, meaning there can only be one representative of the same object

2019-01-03T21:38:55Z

List

← Older revision		Revision as of 21:38, 3 January 2019
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	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		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
	numlist.reverse() # reverse in place		numlist.reverse() # reverse in place
			==Tuples==
			Tuples are immutable
			t=(1,2,3)
			len(t)
			t[0]
			t.count(1) # will count the amount of time 1 appears
			t.index(1) # will return the first index that 1 occors

	==Dictionaries==		==Dictionaries==
	'''Has key value pairs'''		'''Has key value pairs'''

2019-01-03T21:31:28Z

Dictionaries

← Older revision		Revision as of 21:31, 3 January 2019
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	Add to dictonary		Add to dictonary
	mydict2['k4'] = 300		mydict2['k4'] = 300
			List all keys in dictionary
			mydict2.keys()
			List all values in distionary
			dict2.values()
			List both items and keys
			dict2.items()

2019-01-03T01:57:42Z

Dictionaries

2019-01-03T01:51:23Z

Dictionaries

2019-01-02T22:01:22Z

Dictionaries

← Older revision		Revision as of 22:01, 2 January 2019
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	numlist.reverse() # reverse in place		numlist.reverse() # reverse in place
	==Dictionaries==		==Dictionaries==
			'''Has key value pairs'''
			mydict = {'key1':'value1', 'key2':'value2'}

2019-01-02T21:34:49Z

← Older revision		Revision as of 21:34, 2 January 2019
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	''' Sort and Reverse'''		''' 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		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
			numlist.reverse() # reverse in place
			==Dictionaries==