Understanding Python Functions Through Examples
This content provides insight into Python functions through code examples. It covers topics like checking for square grids and concatenating elements in a list. The explanation with images simplifies complex concepts and helps in understanding these functions effectively.
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CSc CSc 120 120 Introduction to Computer Programming II Introduction to Computer Programming II CODE EXAMPLES 01
def grid_is_square(arglist): length= len(arglist) i = 0 for i in range(length): x = 0 if arglist[i][x] == arglist[x][i]: return True elif arglist[i][x] != arglist[x][i]: return False 3
if BoolExpr: x = True else: x = False def grid_is_square(arglist): length= len(arglist) i = 0 for i in range(length): x = 0 if arglist[i][x] == arglist[x][i]: return True elif arglist[i][x] != arglist[x][i]: return False is equivalent to: x = BoolExpr 4
def grid_is_square(arglist): length= len(arglist) i = 0 for i in range(length): x = 0 return arglist[i][x] == arglist[x][i] Simplifying out the Boolean expression makes the bug in the code easier to see 5
def grid_is_square(arglist): length= len(arglist) i = 0 for i in range(length): x = 0 return arglist[i][x] == arglist[x][i] this initialization has no effect 6
def grid_is_square(arglist): length= len(arglist) i = 0 for i in range(length): x = 0 return arglist[i][x] == arglist[x][i] we don't need this 7
def grid_is_square(arglist): length= len(arglist) for i in range(length): return arglist[i][0] == arglist[0][i] returns on the first iteration 8
def concat_elements(list, startpos, stoppos): result = "" if (startpos < 0): startpos = 0 if (stoppos > len(list)): stoppos = len(list) if (startpos > stoppos): return '' a = list[startpos:stoppos+1] result = ''.join(a) return result 10
def concat_elements(list, startpos, stoppos): result = "" if (startpos < 0): startpos = 0 if (stoppos > len(list)): stoppos = len(list) if (startpos > stoppos): return '' a = list[startpos:stoppos+1] result = ''.join(a) startpos = max(startpos, 0) stoppos = min(stoppos, len(list)) return result 11
def concat_elements(list, startpos, stoppos): result = "" startpos = max(startpos,0) stoppos = min(stoppos, len(list))) This is not really needed if (startpos > stoppos): return '' a = list[startpos:stoppos+1] result = ''.join(a) return result 12
def concat_elements(list, startpos, stoppos): new = "" for i in range (max(0, startpos), min( len(list), stoppos + 1)): new += list [i] return new 13
