By Alex Martelli
This booklet deals Python programmers one position to appear once they need assistance remembering or interpreting the syntax of this open resource language and its many strong yet scantily documented modules. This complete reference consultant makes it effortless to seem up the main often wanted information--not as regards to the Python language itself, but additionally the main often used components of the normal library and an important third-party extensions. Ask any Python aficionado and you may pay attention that Python programmers have all of it: a chic object-oriented language with readable and maintainable syntax, that enables for simple integration with parts in C, C++, Java, or C#, and an immense selection of precoded general library and third-party extension modules. furthermore, Python is simple to profit, but strong adequate to tackle the main bold programming demanding situations. yet what Python programmers used to lack is a concise and transparent reference source, with the right degree of steering in how most sensible to take advantage of Python's nice strength. Python in a Nutshell fills this desire. Python in a Nutshell, moment variation covers greater than the language itself; it additionally offers with the main often used components of the normal library, and the most well-liked and critical 3rd get together extensions. Revised and improved for Python 2.5, this booklet now comprises the gory info of Python's new subprocess module and breaking information approximately Microsoft's new IronPython undertaking. Our "Nutshell" layout suits Python completely by way of featuring the highlights of crucial modules and features in its common library, which conceal over ninety% of your sensible programming wishes. This publication contains: A fast moving educational at the syntax of the Python language a proof of object-oriented programming in Python assurance of iterators, turbines, exceptions, modules, programs, strings, and normal expressions a brief reference for Python's integrated kinds and features and key modules Reference fabric on vital third-party extensions, akin to Numeric and Tkinter information regarding extending and embedding Python Python in a Nutshell presents an excellent, no-nonsense speedy connection with info that programmers depend on the main. This booklet will instantly earn its position in any Python programmer's library. compliment for the 1st version: "In a nutshell, Python in a Nutshell serves one fundamental target: to behave as an instantly available aim for the Python language. actual, you will get lots of the comparable middle info that's offered in the covers of this quantity on-line, yet it will normally be damaged into a number of documents, and possibly missing the examples or the precise syntax description essential to actually comprehend a command." --Richard Cobbett, Linux structure "O'Reilly has a number of strong books, of which Python in a Nutshell via Alex Martelli is among the most sensible for supplying you with a few concept of what Python is ready and the way to do precious issues with it." --Jerry Pournelle, Byte journal
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Extra resources for Python in a Nutshell, Second Edition (In a Nutshell (O'Reilly))
Simple statements A simple statement is one that contains no other statements. A simple statement lies entirely within a logical line. As in other languages, you may place more than one simple statement on a single logical line, with a semicolon (;) as the separator. However, one statement per line is the usual Python style, and makes programs more readable. Any expression can stand on its own as a simple statement (I'll discuss expressions in detail in "Expressions and Operators" on page 50). The interactive interpreter shows the result of an expression statement you enter at the prompt (>>>) and binds the result to a variable named _ (a single underscore).
Integer numbers Integer literals can be decimal, octal, or hexadecimal. A decimal literal is represented by a sequence of digits in which the first nonzero. To denote an octal literal, use 0 followed by a sequence of octal digits (0 to 7). To indicate a hexadecimal literal, use followed by a sequence of hexadecimal digits (0 to 9 and A to F, in either upper- or lowercase). , when the result would not fit within the range of plain integer However, you may choose to terminate any kind of integer literal with a letter L (or l) to explicitly denote a long integer.
Com for up-to-date information. Part II: Core Python Language and Built-ins Chapter 4, The Python Language Chapter 5, Object-Oriented Python Chapter 6, Exceptions Part II: Core Python Language and Built-ins 43 44 Part II: Core Python Language and Built-ins Chapter 7, Modules Chapter 8, Core Built-ins Chapter 9, Strings and Regular Expressions Chapter 4. The Python Language This chapter is a quick guide to the Python language. To learn Python from scratch, I suggest you start with Learning Python, by Mark Lutz and David Ascher (O'Reilly).