130 lines
4 KiB
Python
130 lines
4 KiB
Python
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# Natural Language Toolkit: Word Finder
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#
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# Copyright (C) 2001-2018 NLTK Project
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# Author: Steven Bird <stevenbird1@gmail.com>
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# URL: <http://nltk.org/>
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# For license information, see LICENSE.TXT
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# Simplified from PHP version by Robert Klein <brathna@gmail.com>
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# http://fswordfinder.sourceforge.net/
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from __future__ import print_function
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import random
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# reverse a word with probability 0.5
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def revword(word):
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if random.randint(1,2) == 1:
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return word[::-1]
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return word
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# try to insert word at position x,y; direction encoded in xf,yf
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def step(word, x, xf, y, yf, grid):
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for i in range(len(word)):
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if grid[xf(i)][yf(i)] != "" and grid[xf(i)][yf(i)] != word[i]:
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return False
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for i in range(len(word)):
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grid[xf(i)][yf(i)] = word[i]
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return True
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# try to insert word at position x,y, in direction dir
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def check(word, dir, x, y, grid, rows, cols):
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if dir==1:
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if x-len(word)<0 or y-len(word)<0:
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return False
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return step(word, x, lambda i:x-i, y, lambda i:y-i, grid)
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elif dir==2:
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if x-len(word)<0:
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return False
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return step(word, x, lambda i:x-i, y, lambda i:y, grid)
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elif dir==3:
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if x-len(word)<0 or y+(len(word)-1)>=cols:
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return False
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return step(word, x, lambda i:x-i, y, lambda i:y+i, grid)
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elif dir==4:
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if y-len(word)<0:
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return False
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return step(word, x, lambda i:x, y, lambda i:y-i, grid)
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def wordfinder(words, rows=20, cols=20, attempts=50,
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alph='ABCDEFGHIJKLMNOPQRSTUVWXYZ'):
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"""
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Attempt to arrange words into a letter-grid with the specified
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number of rows and columns. Try each word in several positions
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and directions, until it can be fitted into the grid, or the
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maximum number of allowable attempts is exceeded. Returns a tuple
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consisting of the grid and the words that were successfully
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placed.
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:param words: the list of words to be put into the grid
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:type words: list
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:param rows: the number of rows in the grid
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:type rows: int
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:param cols: the number of columns in the grid
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:type cols: int
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:param attempts: the number of times to attempt placing a word
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:type attempts: int
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:param alph: the alphabet, to be used for filling blank cells
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:type alph: list
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:rtype: tuple
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"""
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# place longer words first
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words = sorted(words, key=len, reverse=True)
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grid = [] # the letter grid
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used = [] # the words we used
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# initialize the grid
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for i in range(rows):
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grid.append([""] * cols)
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# try to place each word
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for word in words:
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word = word.strip().upper() # normalize
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save = word # keep a record of the word
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word = revword(word)
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for attempt in range(attempts):
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r = random.randint(0, len(word))
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dir = random.choice([1,2,3,4])
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x = random.randint(0,rows)
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y = random.randint(0,cols)
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if dir==1: x+=r; y+=r
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elif dir==2: x+=r
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elif dir==3: x+=r; y-=r
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elif dir==4: y+=r
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if 0<=x<rows and 0<=y<cols:
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if check(word, dir, x, y, grid, rows, cols):
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# used.append((save, dir, x, y, word))
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used.append(save)
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break
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# Fill up the remaining spaces
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for i in range(rows):
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for j in range(cols):
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if grid[i][j] == '':
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grid[i][j] = random.choice(alph)
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return grid, used
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def word_finder():
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from nltk.corpus import words
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wordlist = words.words()
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random.shuffle(wordlist)
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wordlist = wordlist[:200]
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wordlist = [w for w in wordlist if 3 <= len(w) <= 12]
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grid, used = wordfinder(wordlist)
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print("Word Finder\n")
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for i in range(len(grid)):
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for j in range(len(grid[i])):
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print(grid[i][j], end=' ')
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print()
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print()
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for i in range(len(used)):
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print("%d:" % (i+1), used[i])
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if __name__ == '__main__':
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word_finder()
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