# Lab 7


def asteriskLine(len):
    ''' Non-recursive version of asteriskLine; provided in lab notes '''
    return '*' * len


# ------------------------------------
# Task 1
# ------------------------------------
def asteriskTriangle(len):
    ''' Prints inverted triangles composed of successilvely shorter lines of * '''
    if len > 0:
       print asteriskLine(len)
       asteriskTriangle(len - 1)

# Tests:
#asteriskTriangle(5)


# ------------------------------------
# Task 2
# ------------------------------------
def peaks(height, width):
    ''' Draws sideways peaks that contain 2 * height number of lines,
    with width initial number of asterisks per line '''
    if height > 0:
        print '<' + asteriskLine(width)
        peaks(height-1, width+3)
        print asteriskLine(width) + '>'

# Tests:
# peaks(5,5)


# ------------------------------------
# Bonus functions, provided FYI
# ------------------------------------
def lineSymbol(len, symbol):
    ''' More robust version of asteriskLine '''
    return symbol * len


def lineSymbolV2(len,symbol):
    ''' Recursive version, just included for fun '''
    if len == 1:
       return symbol
    else:
       partialLine = lineSymbol(len-1,symbol)
       return symbol + partialLine


def triangleSymbol(len, sym):
    if len > 0:
       print lineSymbol(len, sym)
       triangleSymbol(len-1, sym)


def asteriskLineV2(len):
    ''' Recursive version of asteriskLine, just included for fun '''
    if len <= 0:
       return ""
    else:
       if len == 1:
           return "*"
       else:
          partialLine = asteriskLine(len-1)
          return "*" + partialLine