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  1. #!/usr/bin/env python2
  2.  
  3. """
  4. grph.py
  5.  
  6. LICENSING: PUBLIC DOMAIN
  7.  
  8. Peace... -George
  9. """
  10.  
  11. #_____________________________________________________________________________
  12. # Imports
  13. #
  14. from math import sin, cos, tan
  15. import os
  16. import sys
  17.  
  18. #_____________________________________________________________________________
  19. # Functions
  20. #
  21. def fprintf(fstream, fmt, *args):
  22.     """
  23.     Emulate C's fprintf() function.
  24.     """
  25.     fmt %= args
  26.     fstream.write(fmt)
  27.     return len(fmt)
  28.  
  29. def plot(x_expression, xmin, xmax, ymin, ymax):
  30.     """
  31.     plot(str, int, int, int, int) -> str
  32.  
  33.     Return a string representation of a graph of x_expression.
  34.  
  35.     BUGS:
  36.     - The graph is inverted.
  37.     - Zero Divison Error when expressions like `1/x` are passed as
  38.       x_expression.
  39.     """
  40.     return '\n'.join(
  41.             ''.join((
  42.         lambda x,y: 'o' if round(eval(x_expression)) == y else (
  43.                     ' ' if y != 0 and x != 0 else (
  44.                     '|' if y != 0 and x == 0 else (
  45.                     '-' if y == 0 and x != 0 else
  46.                     '+' ))))
  47.                 (x,y)
  48.         for x in xrange(xmax, xmin-1, -1))
  49.         for y in xrange(ymax, ymin-1, -1))
  50.  
  51. #_____________________________________________________________________________
  52. # Main function
  53. # 
  54. def main():
  55.     x_expression = raw_input("f(x) = ")
  56.     fprintf(sys.stdout, "\nGraph of f(x) = %s\n%s\n", 
  57.             x_expression,
  58.             plot(x_expression, -10, 10, -10, 10))
  59.     return 0
  60.  
  61. if __name__ == '__main__':
  62.     main()
  63.  
  64.  
Success #stdin #stdout 0.03s 4720KB
comments (?)
stdin
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x + 3
stdout
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f(x) = 
Graph of f(x) = x + 3
   o      |          
    o     |          
     o    |          
      o   |          
       o  |          
        o |          
         o|          
          o          
          |o         
          | o        
----------+--o-------
          |   o      
          |    o     
          |     o    
          |      o   
          |       o  
          |        o 
          |         o
          |          
          |          
          |
https://ideone.com/ezTVc
language:
Python (cpython 2.7.16)
created:
14 years ago
visibility:
public

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