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String Methods

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. To get offline help with string methods you can input in a Python Interpreter:. As it sounds like, the string replace method will replace one character or a set of characters with another. S = 'light' s.replace('l','f') 'fight' s.replace('l','br') 'bright' s 'light' s = s.replace('li','bou') 'bought'. There are at times when you would want to replace x amount of the next encounters, not all. S = 'the great beyond of ...

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Lists

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. Lister = ['index0', 1, 2.1]. This creates a list. It has three indexes. Indexes will start at 0 and continue. Indexes are separated with commas. The first index of lister lister[0] is a string. The seconds index lister[1] is an integer. The third index lister[2] is a float. Lister = ['index0', 1, 2.1] lister ['index0', 1, 2.1] lister[0] 'index0' lister[1] 1 lister[2] 2.1 lister[-1] 2.1 lister[-2] 1. Comprehensions ar...

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. Your browser does not support the video tag.

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Indexing and Slicing

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. One of the most used features of Python is indexing and slicing. These are the acts of accessing the characters in the string by position, assuming you are doing it to a string. S = 'index' s 'index' s[0] 'i' s[-1] 'x'. The first index s[0] gets the item at offset 0 from the left, while s[-1] gets the item from offset 1 from the end. Slicing returns an entire section instead of one single item.

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List Methods

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. To get offline help with list methods you can input in a Python Interpreter:. The append() method will add an item to the end of the list. It will push onto the stack. Lister = [1,2] lister.append('test') lister [1, 2, 'test'] lister.append(3) lister [1, 2, 'test', 3]. In the same way append() adds one item, extend() will add numerous items. Lister [1, 2, 3] lister.insert(1, 'index1') lister [1, 'index1', 2, 3].

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com.

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Executing

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. How to Execute python code. There are 3 main ways to execute a python script. H3 Interactive Prompt A:link { COLOR: DodgerBlue /*The color of the link*/ } A:visited { COLOR: Lime /*The color of the visited link*/ } A:hover { COLOR: Snow /*The color of the mouseover or 'hover' link*/ } body{ color: white; background-image:url(image/dark spots.jpg); background-attachment:fixed; }. Each IDE is different in how you confi...

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Escape Sequences and Raw Strings

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Escape Sequences and Raw Strings. String Expressions and Formatting. Matthew J Page.com. The table of Escape Sequnces can be found on the Strings tab. Back slashes are used to allow special byte codes: Escape Sequences.The backslash " " and the following character(s) are replaced by a single character which has a binary value specified by the character(s). S = '1 n2 t3 n ' s '1 n2 t3 n ' print(s) 1 2 3 len(s) 7. Filer = open(r'C: new text.txt','w').