Python Lists - Part I Cheat Sheet

A Programming › Python cheat sheet in English by Nouha_Thabet

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A list is a collection which is ordered and changeable. In Python lists are written with square brackets.

RYB_color = ["Red","Yellow","Blue"] 
 print(RYB_color) 
 >>>['Red','Yellow','Blue']

`RYB_Secondary = ["Red","Yellow","Blue","Orange","Green","Purple"] Example 1 print(RYB_Secondary[1:5] >>>['Yellow','Blue','Orange','Green']`
Note: Index 5 is not included.
`Example 2 print(RYB_Secondary[-5:-2] >>>['Yellow','Blue','Orange','Green']`
Note: Index -2 is not included.
`Example 3 print(RYB_Secondary[:5] >>>['Red','Yellow','Blue','Orange','Green']`
Note: By leaving out the start value, the range will start at the first item.
`Example 4 print(RYB_Secondary[1:] >>>['Yellow','Blue','Orange','Green','Purple']`
Note: By leaving out the end value, the range will go on to the end of the list.

RYB_color = ["Red","Yellow","Blue"] 
 print(len(RYB_color)) 
 >>> 3

RYB_color = ["Red","Yellow","Blue"] 
 RYB_color[1] = "Green"
 print(RYB_color) 
 >>>['Red','Green','Blue']

`RYB_color = ["Red","Yellow","Blue"]`
Using the `append()` method to append an item in the and of the list.
`RYB_color.append("White") >>> ['Red','Yellow','Blue','White']`
Use the `insert()` method to add an item at the specified index.
`RYB_color.insert(2,"White") >>> ['Red','Yellow','White','Blue']`

`RYB_color = ["Red","Yellow","Blue"]`
`RYB_color.remove("Yellow")`	`#remove the item "Yellow"`
`RYB_color.pop()`	`#remove the indicated index or the last item if index not specified. In this case the item "Blue" will be removed`
`del RYB_color[1]`	`#remove the item "Yellow"`
`del RYB_color`	`#delete the whole list`
`RYB_color.clear()`	`#return an empty list`

RYB_color = ["Red","Yellow",Blue"] 
 if "Yellow" in RYB_color: 
      print("Yes")

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