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Lists, Functions, & Input/Output in Python. L445/L515. Autumn 2011. Lists. Python has a number of (compound) data types for combining other values, most notably lists a = ['hotel','motel',100]. • Lists are concatenated and sliced in the same way that strings are. >>> aa = ['word']. >>> bb = ['up']. >>> cc = aa + bb.
There are certain things you can do with all sequence types. These operations include indexing, slicing, adding, multiplying, and checking for membership. In addition, Python has built-in functions for finding the length of a sequence and for finding its largest and smallest elements. Python Lists. The list is a most versatile
An array expressed as a LIST in python: L = [ 23, 42, 60, 10, 54, 73]. L = [ 23, 42 len(array) function gives the length of the array. The statement Sort Method. L3 = [ 1, 14, 8, 6, 9]. L3.sort() print L3. [1, 6, 8, 9, 14 ]. Creating a List with all zero elements def makeL(size): mylist = [ ] for k in range(size): mylist.append(0) y pp. ( ).
The sequence can be any kind of sequence object or iterable, including tuples and generators. If you pass in another list, the list function makes a copy. Note that Python creates a single new list every time you execute the [] expression. No more, no less. And Python never creates a new list if you assign a list to a variable.
25 Jul 2014 Functions. Blocks of code that perform a specific task. In Python, a function is defined using the "def" keyword. We have already seen examples of functions. float(), dict(), list(), len() etc. math - sqrt(), floor(), ceil(), radians(), sin() open(), type() etc. localhost:8001/AdvPython.slides.html?print-pdf. 2 of 28.
14 Feb 2016 Built-in Functions. Python documentation lists 80 built-in functions at: docs.python.org/library/functions.html. Math functions: abs(x), round(x, n). Type conversion functions: bool(x), float(x), int(x), long(x), str(x). Input functions: raw_input(x), input(x). Miscellaneous: len(x), id(x)
18 Jun 2012 Release 3.2. Date June 18, 2012. While reference-index describes the exact syntax and semantics of the Python language, this library reference manual describes the standard library that is distributed with Python. It also describes some of the optional components that are commonly included in Python
16 Feb 2010 Otherwise, the list contains the object's attributes' names, the names of its class's attributes, and recursively of the attributes of its class's base classes. The resulting list is sorted alphabetically. For example: 2. Built-in Functions — Python v2.6.4 documentation docs.python.org/library/functions.html.
5 Jan 2008 How Long is a List? • The len() function takes a list as a parameter and returns the number of elements in the list. • Actually len() tells us the number of elements of any set or sequence. (i.e. such as a string) >>> greet = 'Hello Bob'. >>> print len(greet). 9. >>> x = [ 1, 2, 'joe', 99]. >>> print len(x). 4. >>>
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