#-------------------------------------------------------------------------------# Name: module1# Purpose:## Author: penglaixy## Created: 11/08/2013# Copyright: (c) penglaixy 2013# Licence: <your licence>#-------------------------------------------------------------------------------import sysimport randomimport stringdef test(did_pass): ''''' print the result of a test ''' linenum = sys._getframe(1).f_lineno if did_pass: msg = 'Test at line {0} ok'.format(linenum) else: msg = 'Test at line {0} failed'.format(linenum) print msgdef add_vectors(u, v): new_list=[] if len(u) != len(v): print "Parameter error!" for i in range(len(u)): new_list.append(u[i]+v[i]) return new_listdef scalar_mult(s, v): new_list = [] for item in v: new_list.append(s*item) return new_listdef dot_product(u, v): total = 0 if len(u) != len(v): print "Parameter error!" for i in range(len(u)): total += u[i]*v[i] return totaldef cross_product(u, v): ''' a×b=(aybz-azby)i+(azbx-axbz)j+(axby-aybx)k ''' new_list = [] if len(u) != 3 or len(v) != 3: print "Parameter error!" new_list.append(u[1]*v[2] - u[2]*v[1]) new_list.append(u[2]*v[0] - u[0]*v[2]) new_list.append(u[0]*v[1] - u[1]*v[0]) return new_listdef replace_str(str, old, new): while True: index = str.find(old) if -1 != index: str = str[:index] + new + str[(index + len(old)):] else: break return strdef replace(s, old, new): list_str = s.split() new_list = [] for str in list_str: new_list.append(replace_str(str,old, new)) return " ".join(new_list) passdef swap(x,y): print("before swap statement: x:", x, "y:", y) (x,y) = (y,x) x[1] = "hello" y[1] = "world" print("after swap statement: x:", x, "y:", y)def test_suite(): ''''' Run the suite of tests for code in this module ''' test(add_vectors([1,1], [1,1]) == [2,2]) test(add_vectors([1,2], [1,4]) == [2,6]) test(add_vectors([1,2,1], [1,4,3]) == [2,6,4]) test(scalar_mult(5, [1,2]) == [5, 10]) test(scalar_mult(3, [1,0,-1]) == [3, 0, -3]) test(scalar_mult(7, [3, 0, 5, 11, 2]) == [21, 0, 35, 77, 14]) test(dot_product([1,1],[1,1]) == 2) test(dot_product([1, 2],[1,4]) == 9) test(dot_product([1,2,1],[1,4,3]) == 12) test(cross_product([1,2,3],[4,5,6]) == [-3, 6, -3]) test(cross_product([2,3,4],[2,3,4]) == [0,0,0]) test(replace("Mississippi",'i','II') == 'MIIssIIssIIppII') s = "I love spom! Spom is my favorite food. Spom, spom, yum!" test(replace(s,'om','am') == "I love spam! Spam is my favorite food. Spam, spam, yum!") test(replace(s,'o', 'a') == "I lave spam! Spam is my favarite faad. Spam, spam, yum!") passdef main(): test_suite() a = ["This", "is", "fun"] b = [2,3,4] print("before swap statement: a:", a, "b:", b) swap(a,b) print("after swap statement: a:", a, "b:", b)if __name__ == '__main__': main()
