By Mark Lutz
Up-to-date for either Python 3.4 and 2.7, this handy pocket consultant is the right on-the-job speedy reference. You’ll locate concise, need-to-know info on Python kinds and statements, distinctive procedure names, integrated services and exceptions, universal ordinary library modules, and different famous Python instruments. The convenient index allows you to pinpoint precisely what you need.
Written via Mark Lutz—widely famous because the world’s best Python trainer—Python Pocket Reference is a perfect significant other to O’Reilly’s vintage Python tutorials, Learning Python and Programming Python, additionally written by means of Mark.
This 5th variation covers:
• integrated item kinds, together with numbers, lists, dictionaries, and more
• Statements and syntax for growing and processing objects
• services and modules for structuring and reusing code
• Python’s object-oriented programming tools
• integrated capabilities, exceptions, and attributes
• particular operator overloading methods
• well-known ordinary library modules and extensions
• Command-line thoughts and improvement tools
• Python idioms and hints
• The Python SQL Database API
Read or Download Python Pocket Reference (5th Edition) PDF
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Additional resources for Python Pocket Reference (5th Edition)
Example text
If count is passed, the first count oc‐ currences are replaced. join(x). splitlines([keepends]) Splits string S on line breaks, returning lines list. The result does not retain line break characters unless keepends is true. format_map(mapping) See section “String formatting”. format(**M), but M is not copied. capitalize() Capitalizes the first character of string S, and lowercases its other characters. expandtabs([tabsize]) Replaces tabs in string S with tabsize spaces (default is 8). strip([chars]) Removes leading and trailing whitespace from string S (or characters in chars if passed).
L = list('spam') Creates a list of all items in any iterable, by calling the type constructor function. L = [x ** 2 for x in range(9)] Creates a list by collecting expression results during itera‐ tion (list comprehension). append(X) Inserts the single object X at the end of L, changing the list in-place. extend(I) Inserts each item in any iterable I at the end of L in-place (like an in-place +). Similar to L[len(L):] = I. Hint: use L[:0] = I to prepend all items in I. sort(key=None, reverse=False) Sorts L in-place, in ascending order by default.
The re‐ sult of 'a' + u'bc' is u'abc'). S. ASCII data (and raise an error for non-ASCII characters). The built-in str() and unicode() func‐ tions can be used to convert between normal and Unicode strings, and the encode() and decode() string methods apply and undo Unicode encodings. X’s built-in open() function files. Lists Lists are mutable (changeable) sequences of object references ac‐ cessed by offset (position). Literals and creation List literals are written as a comma-separated series of values en‐ closed in square brackets, and various operations construct lists dynamically: 46 | Python Pocket Reference [] An empty list.