Stringio Python

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The following are code examples for showing how to use StringIO.StringIO.They are from open source Python projects. You can vote up the examples you like or vote down the ones you don't like.

Strings are amongst the most popular types in Python. We can create them simply by enclosing characters in quotes.

Python treats single quotes the same as double quotes. Creating strings is as simple as assigning a value to a variable.

For example −var1 = 'Hello World!' Var2 = 'Python Programming'Accessing Values in StringsPython does not support a character type; these are treated as strings of length one, thus also considered a substring.To access substrings, use the square brackets for slicing along with the index or indices to obtain your substring. For example −. #!/usr/bin/python3var1 = 'Hello World!'

Print ('Updated String:- ', var1:6 + 'Python')When the above code is executed, it produces the following result −Updated String:- Hello PythonEscape CharactersFollowing table is a list of escape or non-printable characters that can be represented with backslash notation.An escape character gets interpreted; in a single quoted as well as double quoted strings. #!/usr/bin/python3print ('My name is%s and weight is%d kg!' #!/usr/bin/python3parastr = 'this is a long string that is made up ofseveral lines and non-printable characters such asTAB ( t ) and they will show up that way when displayed.NEWLINEs within the string, whether explicitly given likethis within the brackets n , or just a NEWLINE withinthe variable assignment will also show up.' 'print (parastr)When the above code is executed, it produces the following result. Note how every single special character has been converted to its printed form, right down to the last NEWLINE at the end of the string between the 'up.'

Stringio

And closing triple quotes. Also note that NEWLINEs occur either with an explicit carriage return at the end of a line or its escape code (n) −this is a long string that is made up ofseveral lines and non-printable characters such asTAB ( ) and they will show up that way when displayed.NEWLINEs within the string, whether explicitly given likethis within the brackets , or just a NEWLINE withinthe variable assignment will also show up.Raw strings do not treat the backslash as a special character at all. Every character you put into a raw string stays the way you wrote it −. #!/usr/bin/python3print (r'C:nowhere')When the above code is executed, it produces the following result −C:nowhereUnicode StringIn Python 3, all strings are represented in Unicode.In Python 2 are stored internally as 8-bit ASCII, hence it is required to attach 'u' to make it Unicode. It is no longer necessary now. Built-in String MethodsPython includes the following built-in methods to manipulate strings − Sr.No.Methods & Description1Capitalizes first letter of string2Returns a string padded with fillchar with the original string centered to a total of width columns.3Counts how many times str occurs in string or in a substring of string if starting index beg and ending index end are given.4Decodes the string using the codec registered for encoding.

stringio

A stringio library for Go (like the python StringIO). Forked from https://code.google.com/p/go-stringio/ and updated for Go 1.0.3.

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Introduction

StringIO is a low level library to mimic file I/O operations against buffers (memory). Not like File, it does not touch the filesystem at all. Best suit for testing infrastructure. Cyborg 009 dvd complete. Most language's standard library provides something similar to facilitate the buffer orientated IO operations, and this is an implementation for Go language.

How to use

Its quite straightforward.

StringIO struct implements the following interfaces:

io.ReadWriter, io.Closer, io.Seeker, io.ReadAt, io.WriteAt.

Most File I/O operations are supported, though there are a few exceptions. In most case, the are either invalid or unnecessary given there is no filesystem semantics in StringIO at all. They are:

Fd() - A StringIO has no file descriptor. It doesn't need one, calling StringIO's Fd() function will return (-1, errors.New('invalid'))

Stat() - StringIO has no semantics of file stats. It makes no less to implement a fake stats() call at least for now.

Dir and permission related calls, such as Chown, Chmod, Mkdir, etc.. They are simply not unnecessary.

Linking/Renaming - Since StringIO has no filesystem representation, it makes no sense to implement linking and renaming at all, so no.

For more info, check out the test code. Most use cases for IO operations are tested and can be treated as examples.