List Comprehension || Python Tutorial || Learn Python Programming

𝙎𝙩𝙖𝙮 𝙞𝙣 𝙩𝙝𝙚 𝙡𝙤𝙤𝙥 𝙄𝙉𝙁𝙄𝙉𝙄𝙏𝙀𝙇𝙔: snu.socratica.com/python A list comprehension is a way to construct a list in Python using a single line of code. The pattern of creating an empty list, setting up a for loop, and then using several if-then clauses to determine which data should appear in the list can all be done in a single line in Python.
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[@SustainedFuture]

For those of you playing along at home: If you're enjoying these tutorials as much as I am but dislike typing in long lists and tuples as much as I do, here are the data sets for your cut-and-paste pleasure. Extra typos provided free of charge. movies1 = ["Star Wars", "Gandhi", "Casablanca", "Shawshank Redemption", "Toy Story", "Gone With the Wind", "Citizen Kane", "It's a Wonderful Life", "The Wizard of Oz", "Gattaca", "Rear Window", "Ghost Busters", "To Kill a Mockingbird", "Good Will Hunting", "2001: A Space Odyssey", "Raiders of the Lost Ark", "Groundhog Day", "Close Encounters of the Third Kind"] movies2 = [("Citizen Kane", 1941), ("Spirited Away", 2001), ("It's a Wonderful Life", 1946), ("Gattica",1997), ("No Country for Old Men",2007), ("Rear Window",1954), ("The Lord of the Rings: The Fellowship of the Ring", 2001), ("Groundhog Day", 1993), ("Close Encounters of the Third Kind", 1977), ("The Royal Tenenbaums", 2001), ("The Aviator", 2004), ("Raiders of the Lost Ark", 1981)]

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The double asterisk "**" is used for exponents because in general purpose programming the circumflex or caret "^" was already taken for "start of line" in file parsing, eg regex and for the bit-wise OR operator in C. Old languages didn't have any exp operator because it isn't/wasn't a primitive hardware operation in most CPUs thus exponentiation is provided via a libraries or custom functions. More semantically speaking in various syntax that use the circumflex or caret "^" such as LaTex or MathJacks it actually represents a shift to superscript not necessarily exponentiation (in turn superscript when used with a number is what formally means exponent, but superscript is also used for sigma style sum notation and integral notations.) In addition Python borrows heavily from C conventions and part of the advantage of Python is that it can interact with C more cleanly than many other languages. No need to reinvent the wheel or create mental syntax switching problems for the developer using both languages or simply using regex syntax.

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Never understood List comprehension in a better way before this :) Thanks

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