 # Welcome to Problem Solving with Algorithms and Data Structures — Problem Solving with Algorithms and Data Structures Runestone Interactive Online Python Courses & Tutorials | LearnStreet Argument Is a value provided to a function when the function is called. This value is assigned to the corresponding parameter in the function. Syntax function_name(argument1, argument2, ...): #Function definition Example def sum(a,b): #a & b are two arguments in sum function s=a+b return s Assignment Assignment operator assigns the value to an object, it assigns from right to left. x = 10 # Integer value. x = "John" # String with double quote. x = 'Jack' # String with single quote.# String can be denoted by either a single quote or double quote.x = 45.50 #Float value. The type of a variable depends upon the value assigned. Bytecode Is an intermediate language for the Python Virtual Machine within the interpreter. Class A class is a construct that is used to create instances of itself – referred to as class instances, class objects, instance objects or simply objects. class Class_name: "class documents " #class definition includes data variables, methods, and class Output Code Comments Dictionary break

Learn Python - Free Interactive Python Tutorial Python Cost Model - 6.006 Wiki From 6.006 Wiki Python is a high-level programming language, with many powerful primitives. Analyzing the running time of a Python program requires an understanding of the cost of the various Python primitives. For example, in Python, you can write: where L, L1, and L2 are lists; the given statement computes L as the concatenation of the two input lists L1 and L2. Our goal in this section is to review various Python primitive operations, and to determine bounds and/or estimates on their running times. The Python implementation code base is here. Python Running Time Experiments and Discussion The running times for various-sized inputs were measured, and then a least-squares fit was used to find the coefficient for the high-order term in the running time. The least-squares fit was designed to minimize the sum of squares of relative error, using scipy.optimize.leastsq. The machine used was an IBM Thinkpad T43p with a 1.86GHz Pentium M processor and 1.5GB RAM. Cost of Python Integer Operations

Online Python Tutor - Learn programming by visualizing code execution - Vimperator Google Python Style Guide No whitespace inside parentheses, brackets or braces. No whitespace before a comma, semicolon, or colon. Do use whitespace after a comma, semicolon, or colon except at the end of the line. Yes: if x == 4: print x, y x, y = y, x No: if x == 4 : print x , y x , y = y , x No whitespace before the open paren/bracket that starts an argument list, indexing or slicing. Yes: dict['key'] = list[index] No: dict ['key'] = list [index] Surround binary operators with a single space on either side for assignment (=), comparisons (==, <, >, ! Don't use spaces around the '=' sign when used to indicate a keyword argument or a default parameter value. Yes: def complex(real, imag=0.0): return magic(r=real, i=imag) No: def complex(real, imag = 0.0): return magic(r = real, i = imag) Don't use spaces to vertically align tokens on consecutive lines, since it becomes a maintenance burden (applies to :, #, =, etc

s Python Class - Educational Materials Welcome to Google's Python Class -- this is a free class for people with a little bit of programming experience who want to learn Python. The class includes written materials, lecture videos, and lots of code exercises to practice Python coding. These materials are used within Google to introduce Python to people who have just a little programming experience. To get started, the Python sections are linked at the left -- Python Set Up to get Python installed on your machine, Python Introduction for an introduction to the language, and then Python Strings starts the coding material, leading to the first exercise. This material was created by Nick Parlante working in the engEDU group at Google. Tip: Check out the Python Google Code University Forum to ask and answer questions.

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