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Python package with CText C++ extension

Project description

CText

C++ Advanced text processing library

About

I have started to rewrite on Modern C++ some text processing routines and this is the result so far. CText can solve many complicated tasks that otherwise are taking too much time in C++, some of these like lines and words splitting are available on higher level languages like C#, Java and Python but not and in C++. But C++ gives much more control and except supporting the missing text functions CText also implements hundreds of optimized text routines. The library can be used to quickly solve various pre-processing problems for different NLP and ML tasks or just to practice Modern C++.

Please feel free to contact me for any questions, requests or even critics.

Features

  • Modern C++ Template library: You only need to include one header, very simple to use.
  • Unicode Support: - you can have both UNICODE and ANSI in the project.
  • Hundreds of optimized text processing methods: - Many standard and non-standard text processing operations are covered. I have a long TODO list with much more to add.
  • Clean and easy to understand code: - You can use CText to quickly start more complicated text processing applications and abstracting from the too many lower level details and optimizations.
  • Portable: I am using CText with VS2017/VS2019 and GCC 7.4 but it easily can be ported to other platforms.
  • Stand alone: CText do not depends on any other libraries, the only requirments are C++11 and STL
  • Scalable: All text routines are easily to be extended further for all supported char types and platforms.

Build the CText Unit Test and Demo projects


To build the UnitTest project and the demos with CMake and Visual Studio:
open terminal in the folder \Apps and type
cmake .
Alternatively, you can load in VS2017 or later \Apps\CMakeLists.txt from File->Open->CMake.., after generates cache is completed, choose CMake->Build All


To compile with GCC in Debug or Rlease:
cmake -D CMAKE_BUILD_TYPE=Release .
cmake -D CMAKE_BUILD_TYPE=Debug .

This will build a console application that runs the Unit Tests.

Also there is a Visual Studio solution (CText.sln) with all projects. Run UnitTests project first to see if all tests pass.

Examples

For all examples how to use CText please see the Unit Test project.

Sort lines in a text file

// this example reads a text file and sorts all lines in alphabeta order.
#include <iostream>
#include "../CTEXT/CText.h"
#include "tchar_utils.h"

int main()
{    
    const char* input_name = "/Unsorted.txt";
    const char* output_name = "/Sorted.txt";

    CText pathIn = getcwd(0, 0);
    CText pathOut = pathIn;
    pathIn += input_name;
    pathOut += output_name;

    CText str;
    if(!str.readFile(pathIn.str()))
    {
        std::cerr << "Error, can not open file: " << pathIn << std::endl;
        return 0;
    }
    str.linesSort();
    str.writeFile(pathOut.str(), CText::ENCODING_ASCII);

    return 0;
}

Replace words

    CText s = _T("The quick brown fox jumps over the lazy dog");
    s.replace(_T("brown"), _T("red"));
    cout << s << endl;

Output:

   The quick red fox jumps over the lazy dog 
    CText s = _T("The quick brown fox jumps over the lazy dog");
    const CText::Char* words[] = {_T("quick"), _T("fox"), _T("dog")};
    s.replaceAny(words, 3, _T('-'));
    cout << s << endl;

Output:

   The ----- brown --- jumps over the lazy ---     
    CText s = _T("The quick brown fox jumps over the lazy dog");
    s.replaceAny({_T("fox"), _T("dog")}, {_T("dog"), _T("fox")});
    cout << s << endl;
    CText s = _T("The quick brown Fox jumps over the lazy Dog");
    s.replaceAny({_T("fox"), _T("dog")}, {_T("dog"), _T("fox")}, false);
    cout << s << endl;

Output:

   The quick brown dog jumps over the lazy fox   
   CText s = _T("The quick brown fox jumps over the lazy dog");
   const CText::Char* words[] = {_T("quick"), _T("fox"), _T("dog")};
   s.replaceAny(words, 3, _T("****"));
   cout << s << endl;

Output:

   The **** brown **** jumps over the lazy ****  

Remove words, blocks and characters

   CText s = _T("This is a monkey job!");
   s.remove(_T("monkey"));
   s.reduceChain(' ');
   cout << s << endl;

Output:

   This is a job!
   CText s = _T("Text containing <several> [blocks] separated by {brackets}");
   s.removeBlocks(_T("<[{"), _T(">]}"));
   s.reduceChain(' ');
   s.trim()
   cout << s << endl;

Output:

   Text containing separated by
   s = _T("one and two or three and five");
   s.removeAny({_T("or"), _T("and")});
   s.reduceChain(' ');
   cout << s << endl;

Output:

   one two three five

File paths

CText filepath = _T("D:\\Folder\\SubFolder\\TEXT\\File.dat");
cout << filepath.getExtension() << endl;
cout << filepath.getFileName() << endl;
cout << filepath.getDir() << endl;
filepath.replaceExtension(_T(".bin"));
cout << filepath << endl;
filepath.removeExtension();
cout << filepath << endl;
filepath.replaceExtension(_T(".dat"));
cout << filepath << endl;
filepath.replaceFileName(_T("File2"));
cout << filepath << endl;
filepath.addToFileName(_T("_mask"));
cout << filepath << endl;
filepath.replaceLastFolder(_T("Temp"));
cout << filepath << endl;
filepath.removeAfterSlash();
cout << filepath << endl;

Output

.dat
File.dat
D:\Folder\SubFolder\TEXT\
D:\Folder\SubFolder\TEXT\File.bin
D:\Folder\SubFolder\TEXT\File
D:\Folder\SubFolder\TEXT\File.dat
D:\Folder\SubFolder\TEXT\File2.dat
D:\Folder\SubFolder\TEXT\File2_mask.dat
D:\Folder\SubFolder\Temp\File2_mask.dat
D:\Folder\SubFolder\Temp
CText path1(_T("C:\\Temp"));
CText path2(_T("..\\Folder"));
path1.pathCombine(path2.str());
cout << path1 << endl;

Output

C:\\Folder

Split and collection routines

    CText s = _T("The quick  brown fox jumps  over the lazy dog");
    vector<CText> words;
    if(s.split(words) < 9)
        cout << "Error!" << endl ;
    for(auto& s : words)
        cout << s << endl;
   CText s = _T("The,quick,brown,fox,jumps,over,the,lazy,dog");
   vector<std::string> words;
   if(s.split(words,false,_T(",")) != 9)
      cout << "Error!" << endl ;
   for(auto& s : words)
      cout << s << endl;

Output:

The
quick
brown
fox
jumps
over
the
lazy
dog
    CText s = "Line 1\r\nLine 2\n\nLine 3\n";
    vector<std::string> lines;
    s.collectLines(lines);
    for(auto& s : lines)
      cout << s << endl;

Output:

Line 1
Line 2
Line 3

Read sentences from text file

#include <iostream>
#include "../CTEXT/CText.h"
#include "tchar_utils.h"

int main()
{    
    const char* input_name = "/Columbus.txt";
    const char* output_name = "/Columbus_Sentences.txt";

    CText pathIn = getcwd(0, 0);
    CText pathOut = pathIn;
    pathIn += input_name;
    pathOut += output_name;

    CText str;
    if(!str.readFile(pathIn.str()))
    {
        std::cerr << "Error, can not open file: " << pathIn << std::endl;
        return 0;
    }
    std::vector<CText> sentences;

    str.collectSentences(sentences);

    str.fromArray(sentences, _T("\n\n") );

    str.writeFile(pathOut.str(), CText::ENCODING_UTF8);

    return 0;
}

Count characters and words

CText s = _T("12345678909678543213");
map<CText::Char, int> freq;
s.countChars(freq);
CText s = _T("Nory was a Catholic because her mother was a Catholic, and Nory’s mother was a Catholic because her father was a Catholic, and her father was a Catholic because his mother was a Catholic, or had been.");
std::multimap<int, CText, std::greater<int> > freq;
s.countWordFrequencies(freq);
s.fromMap(freq);
cout << s;

Output:

Catholic 6
a 6
was 6
because 3
her 3
mother 3
and 2
father 2
Nory 1
Nory's 1
been 1
had 1
his 1
or 1

Conversion routines

CText s = _T("1 2 3 4 5 6 7 8 9");
vector<int> v;
s.toArray<int>(v);

Output:

{1,2,3,4,5,6,7,8,9}
CText s = _T("1,2,3,4,5,6,7,8,9");
vector<int> v;
s.toArray<int>(v, _T(','));

Output:

{1,2,3,4,5,6,7,8,9}
CText s = _T("1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8,9.9");
vector<double> v;
s.toArray<double>(v, _T(','));

Output:

{1.1,2.2,3.3,4.4,5.5,6.6,7.7,8.8,9.9}

From hexadecimal numbers array:

CText s = _T("0A 1E 2A 1B");
vector<int> v;
s.toArray<int>(v, _T(' '), true);

Output:

{10, 30, 42, 27}
CText s = _T("1a:2b:3c:4d:5e:6f");
vector<int> v;
s.toArray<int>(v, _T(':'), true);

Output:

{26, 43, 60, 77, 94, 111}

Without separator:

CText s = _T("0A1E2A1B");
s.toArray<int>(v, 0, true);

Output:

{10, 30, 42, 27}
Convert hex to chars string 
CText s = _T("48 65 6C 6C 6F 20 57 6F 72 6C 64");
std::vector<int> bytes;
s.toChars<int>(bytes, true);
s.fromChars<int>(bytes);
cout << s << endl;

Output:

Hello World

Parse numerical matrix:

std::vector<std::vector<int>> m;
CText s = _T("1 2 3\n4 5 6\n7 8 9");
s.toMatrix<int>(m, _T(' '));

Output:

{
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9},
};

Highlight words

Following will make bold all words starting with "Col", "Spa","Isa", ending to "an"), "as" or containing "pe" or "sea":

vector<CText> start = {_T("Col"), _T("Spa"), _T("Isa")};
vector<CText> end = {_T("an"), _T("as")};
vector<CText> contain = {_T("pe"), _T("sea")};
str.wordsEnclose(_T("<b>"), _T("</b>"), &start, &end, &contain);

Portugal had been the main European power interested in pursuing trade routes overseas. Their next-door neighbors, Castile (predecessor of Spain) had been somewhat slower to begin exploring the Atlantic because of the bigger land area it had to re-conquer (the Reconquista) from the Moors. It was not until the late 15th century, following the dynastic union of the Crowns of Castile and Aragon and the completion of the Reconquista, that the unified crowns of what would become Spain (although countries still legally existing) emerged and became fully committed to looking for new trade routes and colonies overseas. In 1492 the joint rulers conquered the Moorish kingdom of Granada, which had been providing Castile with African goods through tribute. Columbus had previously failed to convince King John II of Portugal to fund his exploration of a western route, but the new king and queen of the re-conquered Spain decided to fund Columbus's expedition in hopes of bypassing Portugal's lock on Africa and the Indian Ocean, reaching Asia by traveling west Columbus was granted an audience with them; on May 1, 1489, he presented his plans to Queen Isabella, who referred them to a committee. They pronounced the idea impractical, and advised the monarchs not to support the proposed venture

Python

To install CText:

pip install ctextlib

To use CText in Python script:

from ctextlib import CTextA as text
a = text("Hello World")
print(a)

Python methods reference:

addToFileName

a = text("C:\\Temp\\Temp2\\File.bmp")
a.addToFileName("_mask")
print(a)
C:\Temp\Temp2\File_mask.bmp

append

a = text("Hello ")
a.append("World")
Hello World
a = text("123")
a.append('4',4)
1234444
a = text("")
a.append(['Hello', ' ', 'World'])
Hello World

appendRange

a = text()
a.appendRange('a','z').appendRange('0','9')
abcdefghijklmnopqrstuvwxyz0123456789

between

a = text('The quick brown fox jumps over the lazy dog')
a.between('q','d')
print(a)
uick brown fox jumps over the lazy
a = text('The quick brown fox jumps over the lazy dog')
a.between('quick','lazy')
print(a)
 brown fox jumps over the

contain

a = text('The quick brown fox jumps over the lazy dog')
if a.contain('quick') :
    print("contain 'quick'")
contain 'quick'

Case-incensitive

a = text('The quick brown fox jumps over the lazy dog')
if a.contain('Quick', False) :
    print("contain 'quick'")
contain 'quick'
a = text('The quick brown fox jumps over the lazy dog')
if a.contain(['slow','fast','quick']):
    print("contain 'quick'")
contain 'quick'

containAny

a = text('Hello World')
a.containAny('abcd')
True

containOnly

a = text('4365767')
a.containOnly('0123456789')
True

convertToHex

a = text("Hello World")
a.convertToHex()
print(a)
48 65 6C 6C 6F 20 57 6F 72 6C 64

count

a = text('The quick brown fox jumps over the lazy dog')
a.count('the', False)
2

countWordFrequencies

from ctextlib import CTextA as text
a = text("The quick brown fox jumps over the lazy dog")
a.countWordFrequencies(False)
[(2, 'the'), (1, 'brown'), (1, 'dog'), (1, 'fox'), (1, 'jumps'), (1, 'lazy'), (1, 'over'), (1, 'quick')]

cutAfterFirst

s = text('The quick brown fox jumps over the lazy dog')
a.cutAfterFirst('o')
The quick br

cutAfterLast

s = text('The quick brown fox jumps over the lazy dog')
a.cutAfterLast('o')
The quick brown fox jumps over the lazy d

cutBeforeFirst

s = text('The quick brown fox jumps over the lazy dog')
a.cutBeforeFirst('o')
own fox jumps over the lazy dog

cutEnds

s = text('The quick brown fox jumps over the lazy dog')
a.cutEnds(4)
quick brown fox jumps over the lazy

cutLeft

s = text("Hello World")
s.cutLeft(6)
World

cutRight

s = text("Hello World")
s.cutRight(6)
Hello

enclose

a = text("Hello World")
a.enclose('<','>')
<Hello World>

endsWith

a = text("Hello World")
if a.endsWith('World'):
    print("ends with 'World'")
ends with 'World'

With case-insensitive search:

a = text("Hello World")
if a.endsWith('world', False):
    print("ends with 'world'")
ends with 'world'

endsWithAny

if(a.endsWithAny(['cat','dog'])):
    print('end to animal...')
end to animal...

erase

a = text('The quick brown fox jumps over the lazy dog')
a.erase(8, 10)
print(a)
The quicx jumps over the lazy dog

equal

a = text()
a.equal('A',10)
AAAAAAAAAA

find

a = text('The quick brown fox jumps over the lazy dog')
a.find('brown')
'brown fox jumps over the lazy dog'

With case-incensitive search:

a = text('The quick brown fox jumps over the lazy dog')
a.find('Brown', False)
'brown fox jumps over the lazy dog'

fromArray

a = text()
a.fromArray([1,2,3,4])
print(a)
1 2 3 4
a = text()
a.fromArray([1,2,3,4], '|')
print(a)
1|2|3|4
a = text()
a.fromArray([1,2,3,4], '')
print(a)
1234

Array of floats

a = text()
a.fromArray([1.1,2.2,3.3,4.4])
print(a)
1.1 2.2 3.3 4.4

Array of strings

a = text()
a.fromArray(['hello','world'])
print(a)
hello world
import numpy as np
a = text()
a.fromArray(np.array(["hello","world"]))
print(a)
hello world

fromArrayAsHex

a = text()
a.fromArrayAsHex([10,20,30,40])
print(a)
0A 14 1E 28

Use without separator

a.fromArrayAsHex([10,20,30,40],2,'')
print(a)
0A141E28
a = text()
a.fromArrayAsHex([1000,2000,3000,4000])
print(a)
3E8 7D0 BB8 FA0
a = text()
a.fromArrayAsHex([1000,2000,3000,4000], 4, ',')
print(a)
03E8,07D0,0BB8,0FA0

fromBinary

a = text()
a.fromBinary(12345)
print(a)
00000000000000000011000000111001

fromDouble

a = text()
a.fromDouble(3.333338478)
print(a)
a.fromDouble(3.33989, 4)
print(a)
a.fromDouble(3.333338478, 10)
3.333338
3.3399
3.3333384780

fromHex

a = text()
a.fromHex(1234567)
a.fromHex('a')
0012D687
61

fromInteger

a = text()
a.fromInteger(358764)
print(a)
358764

fromMatrix

from ctextlib import CTextA as text
import numpy as np
x = np.array([[10, 20, 30], [40, 50, 60]])
a = text()
a.fromMatrix(x)
print(a)
10 20 30
40 50 60
from ctextlib import CTextA as text
import numpy as np
x = np.array([[10, 20, 30], [40, 50, 60]])
a = text()
a.fromMatrix(x, ',')
10,20,30
40,50,60

fromMatrixAsHex

from ctextlib import CTextA as text
import numpy as np
x = np.array([[10, 20, 30], [40, 50, 60]])
a = text()
a.fromMatrixAsHex(x)
print(a)
0A 14 1E
28 32 3C
from ctextlib import CTextA as text
import numpy as np
x = np.array([[1000, 2000, 3000], [4000, 5000, 6000]])
a = text()
a.fromMatrixAsHex(x,4)
print(a)
03E8 07D0 0BB8
0FA0 1388 1770

getDir

a = text("D:\\Folder\\SubFolder\\TEXT\\file.dat")
a.getDir()
D:\Folder\SubFolder\TEXT\

getExtension

a = text("D:\\Folder\\SubFolder\\TEXT\\file.dat")
a.getExtension()
'.dat'

getFileName

a = text("D:\\Folder\\SubFolder\\TEXT\\file.dat")
a.getFileName()
'file.dat'

hash

s.hash()
9257130453210036571

indexOf

a = text("The quick brown fox jumps over the lazy dog.")
a.indexOf("brown")
10

indexOfAny

a = text("The quick brown fox jumps over the lazy dog.")
a.indexOfAny(["fox", "dog"])
16

indexOfAny

a = text("The quick brown fox jumps over the lazy dog.")
a.indexOfAny("abc")
7

insert

a = text("abc")
a.insert(1,'d',2)
addbc
a = text("The quick jumps over the lazy dog.")
a.insert(10,"fox ")
The quick fox jumps over the lazy dog.

insertAtBegin
insertAtEnd

a = text("Hello")
a.insertAtBegin("<begin>")
a.insertAtEnd("</begin>")
<begin>abc</begin>

isAlpha

a = text("Abcd")
a.isAlpha()
True

isBinary

a = text("01111011100001")
a.isBinary()
True

isEmpty

a = text()
a.isEmpty()
True

isHexNumber

a = text("12AB56FE")
a.isHexNumber()
True

isNumber

a = text("123456")
a.isNumber()
True

isLower

a = text("hello world")
a.isLower()
True

isUpper

a = text("HELLO WORLD")
a.isUpper()
True

isPalindrome

a = text("racecar")
a.isPalindrome()
True

keep

s = text("Hello World").keep(3,5)
lo Wo

keepLeft

a = text("The quick jumps over the lazy dog.")
a.keepLeft(10)
The quick

keepRight

a = text("The quick jumps over the lazy dog.")
a.keepRight(10)
 lazy dog.

lastIndexOf

s = text("Hello World")
s.lastIndexOf('l')
9

lines

a = text("L1\nL2\n\nL3\nL4\n  \n\nL5")
a.lines()
['L1', 'L2', 'L3', 'L4', 'L5']

linesCount

a = text("L1\nL2\n\nL3\nL4\n  \n\nL5")
a.linesCount()
7

linesRemoveEmpty

a = text("L1\nL2\n\nL3\nL4\n  \n\nL5")
a.linesRemoveEmpty()
print(a)
L1
L2
L3
L4
L5

Several per line methods
linesAppend
linesInsertAtBegin
linesSort
linesPaddRight
linesTrim
Example of opening a text file, sort all lines, and save it with another name

from ctextlib import CTextA as text
s = text()
s.readFile('Unordered.txt')
s.linesSort()
s.writeFile('Sorted_python.txt')

limit

s = text("Hello World")
s.limit(6)
Hello

lower

s = text("Hello World")
s.lower()
hello world

makeUnique

a = text()
a.appendRange('a','z').appendRange('a','z')
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
a.makeUnique()
print(a)
abcdefghijklmnopqrstuvwxyz

mid

a = text("Hello World").mid(3)
lo Wo

nextLine

# Example of iterating all lines
from ctextlib import CTextA as text
a = text("Line1\nLine2\nLine3")
line = text()
pos = 0
while(pos >= 0):
    pos = a.nextLine(pos,line)
    print(line)
Line1
Line2
Line3

nextWord

# Example of iterating all words
from ctextlib import CTextA as text
a = text('The quick brown fox jumps over the lazy dog')
word = text()
pos = 0
while(pos >= 0):
    pos = a.nextWord(pos,word)
    print(word)
The
quick
brown
fox
jumps
over
the
lazy
dog

paddLeft

s = text("Abra")
s.paddLeft('.', 16)
............Abra

paddRight

s = text("Abra")
s.paddRight('.', 16)
Abra............

pathCombine

a = text("C:\\Temp")
a.pathCombine("..\\Folder")
C:\Folder

quote

a = text("Hello")
a.quote()
"Hello"

random

a = text()
a.random()
"P1kAlMiG2Kb7FzP5"
a.sort()
"1257AFGKMPPbiklz"
a.shuffle()
"k2lF7KAPG5M1Pzbi"
a.random(32)
P1kAlMiG2Kb7FzP5tM1QBI6DSS92c31A

randomAlpha

s = text()
s.randomAlpha()
IkEffmzNiMKKASVW

randomNumber

s = text()
s.randomNumber()
3892795431
s.randomNumber(32)
33341138742779319865028602486509

readFile

# demontrates how to read a whole text file
from ctextlib import CTextA as text
a = text()
a.readFile('test.txt')
print(a)
Hello World

regexMatch

s = text("+336587890078")
if(s.regexMatch("(\\+|-)?[[:digit:]]+")):
    print("it is a number")
it is a number

regexLines

animals.txt
------------
Cat
Dog
Giraffe
Lion
Llama
Monkey
Mouse
Parrot
Poodle
Scorpion
Snake
Weasel
# collect all lines starting with given characters
from ctextlib import CTextA as text
a = text()
a.readFile("animals.txt")
a.regexLines("^[A-G][a-z]+")
['Cat', 'Dog', 'Giraffe']

regexReplace

from ctextlib import CTextA as text
a = text("there is sub-sequence in the sub-way string")
a.regexReplace("\\b(sub)([^ ]*)", "sub-$2")
there is sub--sequence in the sub--way string

regexSearch

# collect all words using regex
from ctextlib import CTextA as text
a = text("The quick brown fox jumps over the lazy dog")
a.regexSearch("\\w+")
'The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog']

regexWords

# collect all words starting with given characters
from ctextlib import CTextA as text
a = text("The quick brown fox jumps over the lazy dog")
a.regexWords("^[a-n][a-z]+")
['brown', 'fox', 'jumps', 'lazy', 'dog']   

remove

a = text('we few, we happy few, we band of brothers.')
a.remove('we')
a.reduceChain()
a.trim()
few happy few band of brothers

removeAny

from ctextlib import CTextA as text
a = text('The quick brown fox jumps over the lazy dog')
a.removeAny(['brown','quick','lazy'])
a.reduceChain()
The fox jumps over the dog

removeExtension

a = text("D:\\Folder\\SubFolder\\TEXT\\File.dat")
a.removeExtension()
D:\Folder\SubFolder\TEXT\File

removeFileName

a = text("D:\\Folder\\SubFolder\\TEXT\\File.dat")
a.removeFileName()
D:\Folder\SubFolder\TEXT\

removeWhileBegins

a = text("Some text ending with something")
a.removeWhileBegins("Some text ")
print(a)
ending with something

removeWhileEnds

a = text("Some text ending with something")
a.removeWhileEnds(" something")
print(a)
Some text ending with

replace

a = text("The quick brown fox jumps over the lazy dog")
a.replace("fox", "cat")
print(a)
The quick brown cat jumps over the lazy dog
a = text("The quick brown fox jumps over the lazy dog")
a.replace(["fox", "cat","dog","quick"], "-")
The ----- brown --- jumps over the lazy ---

replaceAny

a = text("The quick brown fox jumps over the lazy dog")
a.replaceAny(["fox", "cat","dog"], "***")
print(a)
The quick brown *** jumps over the lazy ***
a = text("The quick brown fox jumps over the lazy dog")
a.replaceAny(["fox", "dog"], ["dog", "fox"])
The quick brown dog jumps over the lazy fox

reverse

a = text("Hello")
a.reverse()
olleH

right

a = text("Hello World")
a.right(5)
World

rotate

a = text("Hello World")
a.rotateLeft(2)
a.rotateRight(4)

Output

llo WorldHe
ldHello Wor

split

# by default split uses the standard separators (" \t\r\n")
a = text("The quick brown fox jumps over the lazy dog")
a.split()
['The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog']
# split can be used with any list of separator characters
a = text("The quick, brown....fox,,, ,jumps over,the  lazy.dog")
a.split(",. ")
['The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog']

toBinary

bOk = False
a = text("100001")
a.toBinaryNumber(bOk)
33

toHexNumber

bOk = False
a = text("1E1E")
a.toHexNumber(bOk)
7710

trim

a = text(" \t\n   lazy dog  \t\n   ")
a.trim()
lazy dog
a = text("000000000000101")
a.trimLeft("0")
101
a = ("101000000000000")
a.trimRight('0')
101
a = text("0000000101000000000")
a.trim("0")
101

upper

s = text("Hello World")
s.upper()
HELLO WORLD

words

a = text("The quick brown fox jumps over the lazy dog")
a.words()
['The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog']
a = text("The|quick|brown|fox|jumps|over|the|lazy|dog")
a.words('|')
['The', 'quick', 'brown', 'fox', 'jumps', 'over', 'the', 'lazy', 'dog']

wordsCapitalize

a = text("The quick brown fox jumps over the lazy dog")
a.wordsCapitalize()
The Quick Brown Fox Jumps Over The Lazy Dog

wordsCount

a = text('The quick brown fox jumps over the lazy dog')
a.wordsCount()
9

wordsEnclose

a = text("The quick brown fox jumps over the lazy dog")
a.wordsEnclose('[',']')
[The] [quick] [brown] [fox] [jumps] [over] [the] [lazy] [dog]

wordsReverse

a = text("The quick brown fox jumps over the lazy dog")
a.wordsReverse()
ehT kciuq nworb xof spmuj revo eht yzal god

wordsSort

a = text('The quick brown fox jumps over the lazy dog')
a.wordsSort()

Output

The brown dog fox jumps lazy over quick the

writeFile

# demontrates how to read a whole text file
from ctextlib import CTextA as text
a = text("Hello World")
a.writeFile('test.txt')
print(a)

UNICODE for Python

Python is using UTF8 as strings representation. When using Python texts containing non-English Unicode characters it is recommended to use the Unicode version of CText as demonstrated below:

# demonstrate text processing of Swedish unicode text
from ctextlib import CTextU as text
s = text('Den snabbbruna räven hoppar över den lata hunden')
>>> s.cutBeforeFirst('ö')
över den lata hunden
# demonstrate text processing of Russian unicode text
from ctextlib import CTextU as text
s = text('Быстрая коричневая лиса прыгает на ленивую собаку')
s.cutAfterLast('ы')
Быстрая коричневая лиса пр
# demonstrate text processing of Czech unicode text
from ctextlib import CTextU as text
s = text('Rychlá hnědá liška skočí přes líného psa')
s.cutAfterFirst('á', True)
Rychlá
# demonstrate text processing of Greek unicode text
from ctextlib import CTextU as text
s = text('Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί')
s.cutAfterFirst('έ', True)
Η γρήγορη καφέ
# demonstrate text processing of Armenian unicode text
from ctextlib import CTextU as text
s = text('Արագ շագանակագույն աղվեսը ցատկում է ծույլ շան վրա')
s.cutBeforeFirst('է')
է ծույլ շան վրա
# demonstrate text processing of Georgian unicode text
from ctextlib import CTextU as text
s = text('სწრაფი ყავისფერი მელა გადაბმულია ზარმაცი ძაღლი')
s.cutBeforeFirst('მ')
მელა გადაბმულია ზარმაცი ძაღლი

For the full type help(text).

TODO List

  • More methods for words,lines,sentences and complex expressions: There are lots more methods that can be added to support diferent NLP and lexical tasks.
  • Further improve containers abstraction: CText needs more convertion routines to/from STL and other containers and generic data structures.
  • Regular Expressions: - Partial or full support to regular expressions.
  • Other char types: - Character types like char_32 can be also supported
  • Mini Text Editor: - This is a text editor based on CText that I plan to port on Modern C++.
  • Export to Python: - I want to export CText library to Python-3
  • Performance Test: - Add performance tests comparing with STL string.

Project details


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