# Example module for Online Python Tutor # Philip Guo # 2013-08-03 # To get the Online Python Tutor backend to import this custom module, # add its filename ('htmlexample_module') to the CUSTOM_MODULE_IMPORTS # tuple in pg_logger.py # To see an example of this module at work, write the following code in # http://pythontutor.com/visualize.html ''' from htmlexample_module import ColorTable t = ColorTable(3, 4) t.set_color(0, 0, 'red') t.render_HTML() t.set_color(1, 1, 'green') t.render_HTML() t.set_color(2, 2, 'blue') t.render_HTML() for i in range(3): for j in range(4): t.set_color(i, j, 'gray') t.render_HTML() ''' # defines a simple table where you can set colors for individual rows and columns class ColorTable: def __init__(self, num_rows, num_columns): self.num_rows = num_rows self.num_columns = num_columns # create a 2D matrix of empty strings self.table = [] for i in range(self.num_rows): new_lst = ['' for e in range(self.num_columns)] self.table.append(new_lst) # color must be a legal HTML color string def set_color(self, row, column, color): assert 0 <= row < self.num_rows assert 0 <= column < self.num_columns self.table[row][column] = color # call this function whenever you want to render this table in HTML def render_HTML(self): # incrementally build up an HTML table string html_string = '