Initial data commit

Task/Matrix-digital-rain/Python/matrix-digital-rain.py

@@ -0,0 +1,95 @@
+import curses
+import random
+import time
+
+"""
+
+Based on C ncurses version
+
+http://rosettacode.org/wiki/Matrix_Digital_Rain#NCURSES_version
+
+"""
+
+"""
+Time between row updates in seconds
+Controls the speed of the digital rain effect.
+"""
+
+ROW_DELAY=.0001
+
+def get_rand_in_range(min, max):
+    return random.randrange(min,max+1)
+
+try:
+    # Characters to randomly appear in the rain sequence.
+    chars = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
+
+    total_chars = len(chars)
+
+    stdscr = curses.initscr()
+    curses.noecho()
+    curses.curs_set(False)
+
+    curses.start_color()
+    curses.init_pair(1, curses.COLOR_GREEN, curses.COLOR_BLACK)
+    stdscr.attron(curses.color_pair(1))
+
+    max_x = curses.COLS - 1
+    max_y = curses.LINES - 1
+
+
+    # Create arrays of columns based on screen width.
+
+    # Array containing the current row of each column.
+
+    columns_row = []
+
+    # Array containing the active status of each column.
+    # A column draws characters on a row when active.
+
+    columns_active = []
+
+    for i in range(max_x+1):
+        columns_row.append(-1)
+        columns_active.append(0)
+
+    while(True):
+        for i in range(max_x):
+            if columns_row[i] == -1:
+                # If a column is at the top row, pick a
+                # random starting row and active status.
+                columns_row[i] = get_rand_in_range(0, max_y)
+                columns_active[i] = get_rand_in_range(0, 1)
+
+        # Loop through columns and draw characters on rows
+
+        for i in range(max_x):
+            if columns_active[i] == 1:
+                # Draw a random character at this column's current row.
+                char_index = get_rand_in_range(0, total_chars-1)
+                #mvprintw(columns_row[i], i, "%c", chars[char_index])
+                stdscr.addstr(columns_row[i], i, chars[char_index])
+            else:
+                # Draw an empty character if the column is inactive.
+                #mvprintw(columns_row[i], i, " ");
+                stdscr.addstr(columns_row[i], i, " ");
+
+
+            columns_row[i]+=1
+
+            # When a column reaches the bottom row, reset to top.
+            if columns_row[i] >= max_y:
+                columns_row[i] = -1
+
+            # Randomly alternate the column's active status.
+            if get_rand_in_range(0, 1000) == 0:
+                if columns_active[i] == 0:
+                    columns_active[i] = 1
+                else:
+                    columns_active[i] = 0
+
+            time.sleep(ROW_DELAY)
+            stdscr.refresh()
+
+except KeyboardInterrupt as err:
+    curses.endwin()