Download The Python Quick Syntax Reference by Gregory Walters PDF

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By Gregory Walters

The Python quickly Syntax Reference is the «go to» e-book that includes a simple to learn and useguide to Python programming and improvement. This condensed code and syntaxreference offers the Python language in a well-organized structure designed tobe used time and again.
You wont locate jargon, bloated samples, case reviews, or heritage of hi Worldand laptop concept during this convenient reference. This Python syntax reference ispacked with priceless details and is a must have for any Python developer.

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L = [1,2,3,4,5,6,7] >>>l[3] 4 L[x1:x2] Slice of list L from index position x1 to x2 (zero-based). >>> l = [1,2,3,4,5,6,7] >>> l[2:4] [3, 4] 52 CHAPTER 6 ■ Data Structures del(L[x]) Removes the item from list L at index position x (zero-based). >>> l = ['F', 'E', 'D', 'C', 'B', 'A'] >>> del(l[2]) >>> l ['F', 'E', 'C', 'B', 'A'] List Methods The following methods are available to lists. append(x) Append the value in x to a list. extend(L) Append a list to another list. In the following example, l is modified, l2 is not.

Suffix can be a tuple of suffixes to search for. expandtabs([tabsize]) Returns a copy of the string with all tabs replaced by one or more space characters. Default tab size is 8. In the following example, the “\t” character equates to a tab character. find(substring[,start[,end]]) Returns the index of the first instance of substring is located within the string. Returns -1 if sub is not found. Index is zero-based. The start and end parameters allow you to narrow the find. format(*args,**kwargs) Returns a string that is formatted using a formatting operation.

Format, but the mapping parameter is used directly and not copied to a dictionary. In the following example, there are two items that will be substituted in the string, one {vocation} and the other {location}. We have created a class called Helper, which expects a dictionary key/value pair. If the key/value pair is provided, then we get that value. If not, the __missing__ routine is called and the key is returned. format_map routine, each key in the format function definition is sent into the Helper class.

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